DEPARTMENT OF LICENSING AND REGULATORY AFFAIRS  
DIRECTOR'S OFFICE  
CONSTRUCTION SAFETY STANDARDS  
(By authority conferred on the director of the department of licensing and regulatory  
affairs by sections 19 and 21 of 1974 PA 154, MCL 408.1019 and 408.1021, and  
Executive Reorganization Order Nos. 1996-2, 2003-1, 2008-4, and 2011-4, MCL,  
445.2001, 445.2011, 445.2025 and 445.2030)  
PART 26. STEEL ERECTION  
R 408.42601 Scope.  
Rule 2601. (1) This part sets forth requirements to protect employees from the  
hazards associated with steel erection activities involved in the construction,  
alteration, or repair of single  
structures where steel erection occurs.  
and  
multistory buildings, bridges, and other  
The requirements of this part apply to  
employers engaged in steel erection unless otherwise specified. This part does not  
apply to electrical transmission towers, communication and broadcast towers, or  
tanks. Examples of structures where steel erection may occur, include, but are not  
limited to, the following:  
(a) Single and multistory buildings.  
(b) Systems-engineered metal buildings.  
(c) Lift slab/tilt-up structures.  
(d) Energy exploration structures.  
(e) Energy production, transfer and storage structures, and facilities.  
(f) Auditoriums.  
(g) Malls.  
(h) Amphitheaters.  
(i) Stadiums.  
(j) Power plants.  
(k) Mills.  
(l) Chemical process structures.  
(m) Bridges.  
(n) Trestles.  
(o) Overpasses.  
(p) Underpasses.  
(q) Viaducts.  
(r) Aqueducts.  
(s) Aerospace facilities and structures.  
(t) Radar and communication structures.  
(u) Light towers.  
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(v) Signage.  
(w) Billboards.  
(x) Scoreboards.  
(y) Conveyor systems.  
(z) Conveyor supports and related framing.  
(aa) Stairways.  
(bb) Stair towers.  
(cc) Fire escapes.  
(dd) Draft curtains.  
(ee) Fire containment structures.  
(ff) Monorails.  
(gg) Aerialways.  
(hh) Catwalks.  
(ii) Curtain walls.  
(jj) Window walls.  
(kk) Store fronts.  
(ll) Elevator fronts.  
(mm) Entrances.  
(nn) Skylights.  
(oo) Metal roofs.  
(pp) Industrial structures.  
(qq) Hi-bay structures.  
(rr) Rail marine, and other transportation structures.  
(ss) Sound barriers.  
(tt) Water process and water containment structures.  
(uu) Air and cable-supported structures.  
(vv) Space frames.  
(ww) Geodesic domes.  
(xx) Canopies.  
(yy) Racks and rack support structures and frames.  
(zz) Platforms.  
(aaa) Walkways.  
(bbb) Balconies.  
(ccc) Atriums.  
(ddd) Penthouses.  
(eee) Car dumpers.  
(fff) Stackers/reclaimers.  
(ggg) Cranes and craneways.  
(hhh) Bins.  
(iii) Hoppers.  
(jjj) Ovens.  
(kkk) Furnaces.  
(lll) Stacks.  
(mmm) Amusement park structures and rides.  
(nnn) Artistic and monumental structures.  
(2) Steel erection activities include all of the following:  
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(a) Hoisting, laying out, placing, connecting,  
welding,  
burning, guying,  
bracing, bolting, plumbing, and rigging structural steel, steel joists, and metal  
buildings.  
(b) Installing metal decking, curtain walls, window walls, siding systems,  
miscellaneous metals, ornamental iron, and similar materials.  
(c) Moving point-to-point while performing the activities specified in this  
subrule.  
(3) All of the following activities are covered by this part when they occur during  
and are a part of steel erection activities:  
(a) Rigging.  
(b) Hoisting.  
(c) Laying out.  
(d) Placing.  
(e) Connecting.  
(f) Guying.  
(g) Bracing.  
(h) Dismantling.  
(i) Burning.  
(j) Welding.  
(k) Bolting.  
(l) Grinding.  
(m) Sealing.  
(n) Caulking.  
(o) All related activities for construction, alteration or repair of materials and  
assemblies such as any of the following:  
(i) Structural steel.  
(ii) Ferrous metals and alloys.  
(iii) Nonferrous metals and alloys.  
(iv) Glass.  
(v) Plastics and synthetic composite materials.  
(vi) Structural metal framing and related bracing and assemblies.  
(vii) Anchoring devices.  
(viii) Structural cabling.  
(ix) Cable stays.  
(x) Permanent and temporary bents and towers.  
(xi) Falsework for temporary supports of permanent steel members.  
(xii) Stone and other non-precast concrete architectural materials mounted on  
steel frames.  
(xiii) Safety systems for steel erection.  
(xiv) Steel and metal joists.  
(xv) Metal decking and raceway systems and accessories.  
(xvi) Metal roofing and accessories.  
(xvii) Metal siding.  
(xviii) Bridge flooring.  
(xix) Cold formed steel framing.  
(xx) Elevator beams.  
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(xxi) Grillage.  
(xxii) Shelf racks.  
(xxiii) Multipurpose supports.  
(xxiv) Crane rails and accessories.  
(xxv) Miscellaneous, architectural, and ornamental metals and metal work.  
(xxvi) Ladders.  
(xxvii) Railings.  
(xxviii) Handrails.  
(xxix) Fences and gates.  
(xxx) Gratings.  
(xxxi) Trench covers.  
(xxxii) Floor plates.  
(xxxiii) Castings.  
(xxxiv) Sheet metal fabrications.  
(xxxv) Metal panels and panel wall systems.  
(xxxvi) Louvers.  
(xxxvii) Column covers.  
(xxxviii) Enclosures and pockets.  
(xxxix) Stairs.  
(xl) Perforated metals.  
(xli) Ornamental iron work.  
(xlii) Expansion control, including bridge expansion joint assemblies.  
(xliii) Slide bearings.  
(xliv) Hydraulic structures.  
(xlv) Fascias.  
(xlvi) Soffit panels.  
(xlvii) Penthouse enclosures.  
(xlviii) Skylights.  
(xlix) Joint fillers.  
(l) Gaskets.  
(li) Sealants and seals.  
(lii) Doors.  
(liii) Windows.  
(liv) Hardware.  
(lv) Detention/security equipment and doors, windows, and hardware.  
(lvi) Conveying systems.  
(lvii) Building specialties.  
(lviii) Building equipment.  
(lix) Machinery and plant equipment, furnishings, and special construction.  
(4) The duties of controlling contractors under this part include,  
limited to, the duties specified in R 408.42608(1) and (3), R 408.42626(6), R  
408.42644(2), and R 408.42651(4).  
but are not  
History: 1954 ACS 78, Eff. Mar. 2, 1974; 1954 ACS 88, Eff. Sept. 16, 1976; 1954 ACS 100, Eff.  
Sept. 16, 1976; 1979 AC; 1985 AACS ; 2002 AACS; 2010 AACS.  
Page 4  
R 408.42602 Reference of standards.  
Rule 2602. (1) The following occupational safety and health administrative standards  
are referenced in this standard. Up to 5 copies of these standards may be obtained at no  
charge from the Michigan Department of Licensing and Regulatory Affairs, MIOSHA  
Standards Section, 7150 Harris Drive, P.O. Box 30643, Lansing, Michigan 48909-8143,  
the cost, at the time of adoption of these rules, is 4 cents per page.  
(a) Construction Safety Standard Part 10. “Lifting and Digging Equipment,”  
R 408.41001a to R 408.41099a.  
(b) Construction Safety Standard Part 28. “Personnel Hoisting in Steel Erection,”  
R 408.42801 to R 408.42809.  
(c) Construction Safety Standard Part 45. “Fall Protection,” R 408.44501 to  
R 408.44502.  
History: 2002 AAC; 2007 AACS; 2013 AACS.  
R 408.42604 Definitions; A to C.  
Rule 2604. (1) "Anchored bridging" means that the steel joist  
connected to a bridging terminus point.  
bridging is  
(2) "Bolted diagonal bridging" means diagonal bridging that is bolted to a steel joist  
or joists.  
(3) "Bridging clip" means a device that is attached to the steel joist to allow the  
bolting of the bridging to the steel joist.  
(4) "Bridging terminus point" means a wall, a beam, tandem joists, with all  
bridging installed and a horizontal truss in the plane of the top chord, or other element at  
an end or intermediate point or points of a line of bridging that provides an anchor  
point for the steel joist bridging.  
(5) "Choker" means a wire rope or synthetic fiber rigging assembly that is used to  
attach a load to a hoisting device.  
(6) "Cold forming" means the process of using press brakes, rolls, or other  
methods to shape steel into desired cross sections at room temperature.  
(7) "Column" means a load-carrying vertical member that is  
primary skeletal framing system. Columns do not include posts.  
part  
of the  
(8) "Competent person" means a person who is experienced and capable of  
identifying an existing or potential hazard in surroundings, or under working  
conditions, that are hazardous or dangerous to an employee and who has the authority  
and knowledge to take prompt corrective measures to eliminate the hazards.  
(9) "Connector" means an employee who, working with hoisting equipment, is  
placing and connecting structural members or components.  
(10) "Constructibility" means the ability to erect structural steel members in  
accordance with these rules without having to alter the overall structural design.  
(11) "Construction load, for joist erection," means any load other than the weight  
of the employee or employees, the joists, and the bridging bundle.  
(12) "Controlled decking zone (CDZ)" means an area in which certain work,  
for example, initial installation and placement of metal decking, may take place without  
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the use of guardrail systems, personal fall arrest systems, fall restraint systems, or  
safety net systems and in which access to the zone is controlled.  
(13) "Controlled load lowering" means lowering a load by means of a  
mechanical hoist drum device that allows a hoisted load to  
maximum control using the gear train or hydraulic components  
be  
lowered with  
of the hoist  
mechanism. Controlled load lowering requires the use of the hoist drive motor, rather  
than the load hoist brake, to lower the load.  
(14) "Controlling contractor" means a prime contractor, general contractor,  
construction manager, or any other legal entity that has the overall responsibility  
for the construction of the project--its planning, quality, and completion.  
(15) "Critical lift" means a lift that exceeds 75% of the rated capacity of the crane  
or derrick or that requires the use of more than 1 crane or derrick.  
History: 2002 AACS.  
R 408.42605 Definitions; D to M.  
Rule 2605. (1) "Decking hole" means a gap or void more than 2 inches (5.1 cm) in  
its least dimension and less than 12 inches (30.5 cm) in its greatest dimension in a floor,  
roof, or other walking/working surface. Pre-engineered holes in cellular decking for  
wires, cables, and the like are not included in this definition.  
(2) "Derrick floor" means an elevated floor of a building or structure that has been  
designated to receive hoisted pieces of steel before final placement.  
(3) "Double connection" means an attachment method where the connection point is  
intended for 2 pieces of steel that share common bolts on either side of a central piece.  
(4) "Double connection seat" means a structural attachment that, during the  
installation of a double connection, supports the first member while the second member is  
connected.  
(5) "Erection bridging" means the bolted diagonal bridging that is required to be  
installed before releasing the hoisting cables from the steel joists.  
(6) "Fall restraint system" means a fall protection system that prevents the user from  
falling any distance. The system is comprised of either a body belt or body harness,  
together with an anchorage, connectors, and other necessary equipment. The other  
components typically include a lanyard, and may also include a lifeline and other devices.  
(7) "Final interior perimeter" means the perimeter of a large permanent open space  
within a building such as an atrium or courtyard. This does not include openings for  
stairways, elevator shafts, and the like.  
(8) "Girt, in systems-engineered metal buildings" means a "Z" or "C" shaped  
member formed from sheet steel spanning between primary framing and supporting wall  
material.  
(9) "Headache ball" means a solid iron weight, usually spherical, used to keep the  
loadline taut and positioned above the hook.  
(10) "Hoisting equipment" means commercially manufactured lifting equipment  
designed to lift and position a load of known weight to a location at some known  
elevation and horizontal distance from the equipment's center of rotation. "Hoisting  
equipment" includes, but is not limited to, all of the following:  
(a) Cranes.  
Page 6  
(b) Derricks.  
(c) Tower cranes.  
(d) Barge-mounted derricks or cranes.  
(e) Gin poles.  
(f) Gantry hoist systems.  
A "come-a-long," that is, a mechanical device, usually consisting of a chain or cable  
attached at each end, that is used to facilitate movement of materials through leverage is  
not considered "hoisting equipment."  
(11) "Leading edge" means the unprotected side and edge of a floor, roof, or  
formwork for a floor or other walking/working surface, such as a deck, which changes  
location as additional floor, roof, decking, or formwork sections are placed, formed, or  
constructed.  
(12) "Metal decking" means a commercially manufactured, structural grade, cold-  
rolled metal panel formed into a series of parallel ribs. As used in this part, the term  
includes metal floor and roof decks, standing seam metal roofs, other metal roof systems,  
and other products, such as bar gratings, checker plate, expanded metal panels, and  
similar products. After installation and proper fastening, these decking materials serve a  
combination of functions, including, but not limited to, any of the following:  
(a) A structural element designed in combination with the structure to resist,  
distribute, and transfer loads, stiffen the structure, and provide a diaphragm action.  
(b) A walking/working surface.  
(c) A form for concrete slabs.  
(d) A support for roofing systems.  
(e) A finished floor or roof.  
(13) "Multiple lift rigging" means a rigging assembly manufactured by wire rope  
rigging suppliers that facilitates the attachment of up to 5 independent loads to the hoist  
rigging of a crane.  
History: 2002 AACS; 2007 AACS; 2014 AACS.  
R 408.42606 Definitions; O to U.  
Rule 2606. (1) "Opening" means a gap or void 12 inches (30.5 cm) or more in its  
least dimension in a floor, roof, or other walking/working surface.For the purposes of  
this part, skylights and smoke domes that do not meet the strength requirements of R  
408.42622(4), (5), (6), and (7) shall be regarded as openings.  
(2) "Permanent floor" means a structurally completed floor at any  
elevation, including slab on grade.  
level or  
(3) "Personal fall arrest system" means a system used to arrest an employee in  
a fall from a working level. A personal fall arrest system consists of an anchorage,  
connectors, a body harness, and may include a lanyard, deceleration device,  
lifeline, or suitable combination of these. The use of a body belt for fall arrest is  
prohibited.  
(4) "Plumbing up" means securing to obtain vertical alignment.  
(5) "Positioning device system" means a body belt or body harness rigged to allow  
an employee to be supported on an elevated, vertical surface, such as a wall or column,  
and work with both hands free while leaning.  
Page 7  
(6) "Post" means a structural member which has a longitudinal axis  
that is  
essentially vertical, and which either weighs 300 pounds or less and is axially loaded  
(a load presses down on the top end) or is not axially loaded, but is laterally restrained  
by the above member.  
mezzanines, and other substructures.  
(7) "Project structural engineer of record" means the  
Posts  
typically support stair landings, wall framing,  
registered, licensed  
professional who is responsible for the design of structural steel framing and whose seal  
appears on the structural contract documents.  
(8) "Purlin, in systems-engineered metal buildings," means a "Z" or "C" shaped  
member formed from sheet steel spanning between primary framing and supporting  
roof material.  
(9) "Qualified person" means an individual who, by possession of a recognized  
degree, certificate, or  
professional  
standing  
or  
by extensive knowledge,  
training, and experience, has successfully demonstrated the ability to solve or  
resolve problems relating to the subject matter, the work, or the project.  
(10) "Safety deck attachment" means an initial attachment that is used to secure  
an initially placed sheet of decking to keep proper alignment and bearing with  
structural support members.  
(11) "Shear connector" means headed steel studs, steel bars, steel lugs, and similar  
devices that are attached to a structural member for the purpose of achieving composite  
action with concrete.  
(12) "Steel erection" means the construction, alteration, or repair of steel  
buildings, bridges, and other structures, including the installation of metal decking and all  
planking used during the process of erection.  
(13) "Steel joist" means an open web, secondary load-carrying member which  
is 144 feet (43.9 m) or less, which is designed by the manufacturer, and which  
is used for the support of floors and roofs. This does not include structural steel trusses  
or cold-formed joists.  
(14) "Steel joist girder" means an open web, primary load-carrying member  
which is designed by the manufacturer and which is used for the support of floors  
and roofs. The term does not include structural steel trusses.  
(15) "Steel truss" means an open web member designed of structural steel  
components by the project structural engineer of record. For the purposes of this part,  
a steel truss is considered equivalent to a solid web structural member.  
(16) "Structural steel" means a steel member or a member made of a substitute  
material, such as, but not limited to, fiberglass, aluminum, or composite members.  
These members include, but are not limited to all of the following that are integrated  
with the structural steel framing of a building:  
(a) Steel joists.  
(b) Joist girders.  
(c) Purlins.  
(d) Columns.  
(e) Beams.  
(f) Trusses.  
(g) Splices.  
(h) Seats.  
Page 8  
(i) Metal decking.  
(j) Girts.  
(k) Bridging.  
(l) Cold-formed metal framing.  
(17) "Systems-engineered metal  
building"  
means  
a
metal, field-  
assembled building system consisting of framing, roof, and wall coverings.  
Typically, many of these components are cold-formed shapes. These individual parts  
are fabricated in 1 or more manufacturing facilities and shipped to the jobsite for  
assembly into the final structure. The engineering design of the system is normally  
the responsibility of the systems-engineered metal building manufacturer.  
(18) "Tank" means a container for holding gases, liquids, or solids.  
(19) "Unprotected sides and edges" means any side or edge,  
except at  
entrances to points of access, of a walking/working surface, for example, a floor, roof,  
ramp, or runway, where there is no wall or guardrail system not less than 39 inches (1.0  
m) high.  
History: 1954 ACS 100, Eff. Sept. 5, 1979; 1979 AC; 1985 AACS; 2002 AACS.  
R 408.42608 Site layout, erection plan, and construction sequence.  
Rule 2608. (1) Before authorizing the commencement of steel erection, the  
controlling contractor shall ensure that the steel erector is provided with the following  
written notifications:  
(a) The concrete in the footings, piers, and walls and the mortar in the masonry piers  
and walls has attained, on the basis of an appropriate ASTM standard test method of  
field-cured samples, either 75% of the intended minimum compressive design strength or  
sufficient strength to support the loads imposed during steel erection.  
(b) Any repairs, replacements, and modifications to the anchor bolts were conducted  
in accordance with R 408.42626(5) and (6).  
(2) A steel erection contractor shall not erect steel unless it has received written  
notification that the concrete in the footings, piers, and walls or the mortar in the masonry  
piers and walls has attained, on the basis of an appropriate ASTM standard test method of  
field-cured samples, either 75% of the intended minimum compressive design strength or  
sufficient strength to support the loads imposed during steel erection.  
(3) The controlling contractor shall ensure that both of the following are provided  
and maintained:  
(a) Adequate access roads into and through the site for the safe delivery and  
movement of derricks, cranes, trucks, other necessary equipment, and the material to be  
erected and means and methods for pedestrian and vehicular control. However, this  
requirement does not apply to roads outside of the construction site.  
(b) A firm, properly graded, drained area which is readily accessible to the work and  
which has adequate space for the safe storage of materials and the safe operation of the  
erector's equipment.  
(4) All hoisting operations in steel erection shall be preplanned to ensure that the  
requirements of R 408.42609(5) and (6) are met.  
(5) If an employer elects, due to conditions specific to the site, to develop alternate  
means and methods that provide employee protection in accordance with  
Page 9  
R 408.42609(4), R 408.42634(4), or R 408.42638(4), then a site-specific erection plan  
shall be developed by a qualified person and be available at the work site. Guidelines for  
establishing a site-specific erection plan are contained in appendix A.  
History: 2002 AACS; 2007 AACS; 2014 AACS.  
R 408.42609. Hoisting and rigging.  
Rule 2609. (1) All the provisions of Construction Safety Standard Part 10 “Lifting  
and Digging Equipment,” as referenced in R 408.42602 apply to hoisting and rigging.  
(2) The headache ball, hook or load shall not be used to transport personnel except  
as provided in subrule (3) of this rule.  
(3) Cranes or derricks may be used to hoist employees when work under this rule is  
being conducted, provided either of the following provisions is met:  
(a) All of the requirements of the Construction Safety Standard Part 10 “Lifting and  
Digging Equipment,” R 408.41021a, except for R 408.41021a(1), as referenced in  
R 408.42602.  
(b) All of the requirements of the Construction Safety Standard Part 28 “Personnel  
Hoisting in Steel Erection,” as referenced in R 408.42602.  
(4) Safety latches on hooks shall not be deactivated or made inoperable, except in  
either of the following situations:  
(a) When a qualified rigger has determined that the hoisting and placing of purlins and  
single joists can be performed more safely by doing so.  
(b) When equivalent protection is provided in a site-specific erection plan.  
(5) Routes for suspended loads shall be preplanned to ensure that no employee is  
required to work directly below a suspended load, except for the following employees:  
(a) Employees engaged in the initial connection of the steel.  
(b) Employees necessary for the hooking or unhooking of the load.  
(6) When working under suspended loads, all of the following criteria shall be met:  
(a) Materials being hoisted shall be rigged to prevent unintentional displacement.  
(b) Hooks with self-closing safety latches or their equivalent shall be used to prevent  
components from slipping out of the hook.  
(c) All loads shall be rigged by a qualified rigger.  
History: 1985 AACS; 2002 AACS; 2007 AACS; 2014 AACS.  
R 408.42610 Multiple lift rigging procedure.  
Rule 2610. (1) A multiple lift shall only be performed if all of the following  
criteria are met:  
(a) A multiple lift rigging assembly is used.  
(b) A maximum of 5 members are hoisted per lift.  
(c) Only beams and similar structural members are lifted.  
(d) All employees engaged in the multiple lift have been trained in multiple lift  
procedures in accordance with R 408.42655(1).  
(e) A crane shall not be used for a multiple lift where such use is contrary to the  
manufacturer's specifications and limitations.  
Page 10  
(2) Components of the multiple lift rigging assembly shall be specifically designed  
and assembled with a maximum capacity for total assembly and for each individual  
attachment point. This capacity, certified by the manufacturer or a qualified rigger,  
shall be based on the manufacturer's specifications with a 5 to 1 safety factor for all  
components.  
(3) The total load shall not exceed either of the following:  
(a) The rated capacity of the hoisting equipment specified in the hoisting  
equipment load charts.  
(b) The rigging capacity specified in the rigging rating chart.  
(4) The multiple lift rigging assembly shall be rigged with members attached at  
their center of gravity and maintained reasonably level, rigged from top down, and  
rigged not less than 7 feet (2.1 m) apart.  
(5) The members on the multiple lift rigging assembly shall be set from the  
bottom up.  
(6) Controlled load lowering shall be used whenever the load  
connectors.  
is  
over the  
History: 1985 AACS; 2002 AACS.  
R 408.42614 Structural steel assembly.  
Rule 2614. (1) Structural stability shall be maintained at all times during the  
erection process.  
Note to subrule (1): Federal Highway Administration (FHWA) regulations  
incorporate by reference a number of standards, policies, and standard specifications  
published by the American Association of State Highway and Transportation Officials  
(AASHTO) and other organizations.  
(See 23 CFR 625.4). Many of these  
incorporated provisions may be relevant to maintaining structural stability during the  
erection process. For instance, as of May 17, 2010, in many cases FHWA requires a  
Registered Engineer to prepare and seal working drawings for falsework used in  
highway bridge construction. (See AASHTO Specifications for Highway Bridges,  
Div. II, § 3.2.1, 15th edition, 1992, which FHWA incorporates by reference in 23 CFR  
625.4). FHWA also encourages compliance with AASHTO Specifications that the  
FHWA regulations do not currently incorporate  
by  
reference.  
(See  
(2) All of the following additional requirements shall apply for multistory  
structures:  
(a) The permanent floors shall be installed as the erection of structural members  
progresses, and there shall be not more than 8 stories between the erection floor and the  
uppermost permanent floor, except where the structural integrity is maintained as a result  
of the design.  
(b) There shall not be more than 4 floors or 48 feet (14.6 m), whichever is less, of  
unfinished bolting or welding above the foundation or uppermost permanently secured  
floor, except where the structural integrity is maintained as a result of the design.  
(c) A fully planked or decked floor or nets shall be maintained within 2 stories or  
30 feet (9.1 m), whichever is less, directly under any erection work being performed.  
Page 11  
History: 1985 AACS; 2002 AACS; 2010 AACS.  
R 408.42615 Rescinded.  
History: 1985 AACS; 2002 AACS.  
R 408.42616 Walking and working surfaces.  
Rule 2616. (1) Shear connectors, such as headed steel studs, steel bars, or steel lugs,  
reinforcing bars, deformed anchors, or threaded studs shall not be attached to the top  
flanges of beams, joists, or beam attachments so that they project vertically from or  
horizontally across the top flange of the member until after the metal decking or other  
walking/working surface has been installed.  
(2) If shear connectors are used in the construction of composite floors, roofs, and  
bridge decks, then employees shall lay out and install the shear connectors after the  
metal decking has been installed, using the metal decking as a working platform.  
Shear connectors shall not be installed from within a controlled decking zone (CDZ), as  
specified in R 408.42648(1)(g).  
(3) Slip resistance of skeletal structural steel. Workers shall not be permitted to  
walk the top surface of any structural steel member installed after July 18, 2006, that  
has been coated with paint or similar material, unless documentation or certification  
that the coating has achieved a minimum average slip resistance of .50 when measured  
with an English XL tribometer or equivalent tester on a wetted surface at a testing  
laboratory is provided. Such documentation or certification shall be based on the  
appropriate ASTM standard test method conducted by a laboratory capable of  
performing the test. The results shall be available at the site and to the steel erector.  
Appendix B references appropriate ASTM standard test methods that may be used to  
comply with this subrule.  
History: 2002 AACS; 2007 AACS.  
R 408.42617 Rescinded.  
History: 1985 AACS; 2002 AACS.  
R 408.42618 Plumbing-up.  
Rule 2618. (1) Turnbuckles and other apparatus used in plumbing up shall be  
accessible to the employees for adjustment and dismantling.  
Connections of the  
equipment used in plumbing up shall be secured. The turnbuckles shall be secured to  
prevent unwinding while under stress.  
(2) When deemed necessary by a competent person, plumbing-up equipment  
shall be installed in conjunction with the steel erection  
stability of the structure.  
process  
to ensure the  
Page 12  
(3) When used, plumbing-up equipment shall be in place and properly  
installed before the structure is loaded with construction material such as loads of joists,  
bundles of decking, or bundles of bridging.  
(4) Plumbing-up equipment shall be removed only with the approval of a  
competent person.  
History: 1985 AACS; 2002 AACS.  
R 408.42620 Metal decking and decking bundles.  
Rule 2620. (1) Bundle packaging and strapping shall not be used for hoisting  
unless specifically designed for that purpose.  
(2) If loose items such as dunnage, flashing, or other materials are placed on the  
top of metal decking bundles to be hoisted, such items shall be secured to the  
bundles.  
(3) Bundles of metal decking on joists shall be landed in accordance with R  
408.42638(4).  
(4) Metal decking bundles shall be landed on framing members so that enough  
support is provided to allow the bundles to be  
bundles from the supports.  
unbanded  
without dislodging the  
(5) At the end of the shift or when environmental or jobsite conditions  
require, metal decking shall be secured against displacement.  
History: 2002 AACS.  
R 408.42621 Rescinded.  
History: 1954 ACS 100, Eff. Sept. 5, 1979; 1979 AC; 1985 AACS; 2002 AACS.  
R 408.42622 Roof, holes and openings.  
Rule 2622. (1) Framed metal deck openings shall have structural members  
turned down to allow continuous deck installation, except where  
structural design constraints or constructibility.  
not allowed by  
(2) Roof and floor holes and openings shall be decked over. If hole or opening  
size, configuration, or other structural design does not allow openings to be decked  
over, such as with elevator shafts, stair wells, and the like, then employees  
shall be protected in accordance with R 408.42645(1).  
(3) Metal decking holes and openings shall not be cut until immediately  
before being permanently filled with the equipment or structure needed or intended to  
fulfill its specific use and  
which  
meets the strength requirements of R  
408.42622(4), (5), (6), and (7) or shall be immediately covered.  
(4) Covers for roof and floor openings shall be capable of supporting,  
without failure, twice the weight of the employees, equipment, and materials that may  
be imposed on the cover at any one time.  
Page 13  
(5) All covers shall be secured when installed to prevent accidental  
displacement by the wind, equipment, or employees.  
(6) All covers shall be painted with high-visibility paint or shall be marked with  
the word "hole" or "cover" to provide warning of the hazard.  
(7) Smoke dome or skylight fixtures that have been  
considered covers for the purpose of this rule unless they  
requirements of subrule (4) of this rule.  
installed  
meet the strength  
are not  
(8) Decking gaps around columns. Wire mesh, exterior plywood,  
or the  
equivalent, shall be installed around columns where planks or metal decking do not fit  
tightly. The materials used shall be of sufficient strength to provide fall protection  
for personnel and prevent objects from falling through.  
History: 2002 AACS.  
R 408.42623 Rescinded.  
History: 1985 AACS; 2002 AACS.  
R 408.42624 Rescinded.  
History: 1954 ACS 100, Eff. Sept. 5, 1979; 1979 AC; 2007 AACS.  
R 408.42625 Rescinded.  
History: 1954 ACS 100, Eff. Sept. 5, 1979; 1979 AC; 2007 AACS.  
R 408.42626 Column anchorage, erection stability, repair, replacement, and  
anchor rods (anchor bolts).  
Rule 2626. (1) All columns shall be anchored by a minimum of 4 anchor rods  
(anchor bolts).  
(2) Each column anchor rod, or anchor bolt assembly, including the column-to-base  
plate weld and the column foundation, shall be designed to resist a minimum eccentric  
gravity load of 300 pounds (136.2 kg) located 18 inches (.46 m) from the extreme outer  
face of the column in each direction at the top of the column shaft.  
(3) Columns shall be set on level finished floors, pre-grouted leveling plates,  
leveling nuts, or shim packs that are adequate to transfer the construction loads.  
(4) All columns shall be evaluated by a competent person to determine whether  
guying or bracing is needed. If guying or bracing is needed, then the employer shall have  
it installed.  
(5) Anchor rods (anchor bolts) shall not be repaired, replaced, or field-modified  
without the approval of the project structural engineer of record.  
(6) Before the erection of a column, the controlling contractor shall provide written  
notification to the steel erector if there has been any repair, replacement, or modification  
Page 14  
of the anchor rods, or anchor bolts, of that column.  
History: 2002 AACS; 2014 AACS.  
R 408.42628 Beams and columns; diagonal bracing; column splices; perimeter  
columns.  
Rule 2628. (1) During the final placing of solid web structural members, the load  
shall not be released from the hoisting line until the members are secured with not less  
than 2 bolts per connection, of the same size and strength as shown in the erection  
drawings, drawn up wrench-tight or the equivalent as specified by the project  
structural engineer of record, except as specified in subrule (3) of this rule.  
(2) A competent person shall determine if more than 2 bolts are necessary to ensure  
the stability of cantilevered members; if additional bolts are needed, they shall be  
installed.  
(3) Solid web structural members used as diagonal bracing shall be secured by at  
least 1 bolt per connection drawn up wrench-tight or the equivalent as specified by the  
project structural engineer of record.  
(4) Each column splice shall be designed to resist a minimum eccentric gravity  
load of 300 pounds (136.2 kg) located 18 inches (.46 m) from the extreme outer face  
of the column in each direction at the top of the column shaft.  
(5) Perimeter columns shall not be erected unless both of the following provisions  
are satisfied:  
(a) The perimeter columns extend a minimum of 48 inches (1.2 m) above the  
finished floor to permit installation of perimeter safety cables before erection of the  
next tier, except where constructability does not allow. (See appendix F)  
(b) The perimeter columns have holes or other devices in or attached to perimeter  
columns at 42 to 45 inches (107-114 cm) above the finished floor and the midpoint  
between the finished floor and the top cable to permit installation of perimeter safety  
cables required by R 408.42645(2), except where constructibility does not allow. (See  
appendix F)  
History: 2002 AACS; 2007 AACS.  
R 408.42629 Double connections.  
Rule 2629. (1) If 2 structural members on opposite sides of a column web, or a beam  
web over a column, are connected sharing common connection holes, then at least 1 bolt  
with its wrench-tight nut shall remain connected to the first member unless a shop-  
attached or field-attached seat or equivalent connection device is supplied with the  
member to secure the first member and prevent the column from being displaced (see  
appendix H for examples of equivalent connection devices).  
(2) If a seat or equivalent device is used, then the seat, or device, shall be designed  
to support the load during the double connection process. The seat or equivalent device  
shall be adequately bolted or welded to both a supporting member and the first member  
before the nuts on the shared bolts are removed to make the double connection.  
Page 15  
History: 2002 AACS; 2007 AACS; 2014 AACS.  
R 408.42630 Rescinded.  
History: 1985 AACS; 2002 AACS.  
R 408.42632 Rescinded.  
History: 1985 AACS; 2002 AACS.  
R 408.42634 Open web joists; field-bolted joists.  
Rule 2634. (1) Except as provided in subrule (2) of this rule, where steel joists are  
used and columns are not framed in at least 2 directions with solid web structural steel  
members, a steel joist shall be field-bolted at the column to provide lateral stability to  
the column during erection. For the installation of this joist all of the following  
provisions apply:  
(a) A vertical stabilizer plate shall be provided on each column for steel joists. The  
plate shall be a minimum of 6 inches by 6 inches (152 mm by 152 mm) and shall extend  
not less than 3 inches (76 mm) below the bottom chord of the joist with a 13/16-inch (21  
mm) hole to provide an attachment point for guying or plumbing cables.  
(b) The bottom chords of steel joists at columns shall be stabilized to prevent  
rotation during erection.  
(c) Hoisting cables shall not be released until the seat at each end of the steel joist is  
field-bolted, and each end of the bottom chord is restrained by the column stabilizer  
plate.  
(2) If constructability does not allow a steel joist to be installed at the column, then  
both of the following provisions apply:  
(a) An alternate means of stabilizing joists shall be installed on both sides near the  
column and the alternate means shall satisfy all of the following provisions:  
(i) Provide stability equivalent to subrule (1) of this rule.  
(ii) Be designed by a qualified person.  
(iii) Be shop-installed.  
(iv) Be included in the erection drawings.  
(b) Hoisting cables shall not be released until the seat at each end of the steel joist is  
field-bolted and the joist is stabilized.  
(3) If steel joists at or near columns span 60 feet (18.3 m) or less, then the joist shall  
be designed with sufficient strength to allow 1 employee to release the hoisting cable  
without the need for erection bridging.  
(4) If steel joists at or near columns span more than 60 feet (18.3 m), then the  
joists shall be set in tandem with all bridging installed, unless an alternative method of  
erection, which provides equivalent stability to the steel joist, is designed by a  
qualified person and is included in the site-specific erection plan.  
(5) A steel joist or steel joist girder shall not be placed on any support structure  
unless the structure is stabilized.  
Page 16  
(6) If steel joists are landed on a structure, then they shall be secured to prevent  
unintentional displacement before installation.  
(7) A modification that affects the strength of a steel joist or steel joist girder  
shall not be made without the approval of the project structural engineer of record.  
(8) Both of the following provisions apply to field-bolted joists:  
(a) Except for steel joists that have been preassembled into panels, connections  
of individual steel joists to steel structures in bays of 40 feet (12.2 m) or more shall be  
fabricated to allow for field-bolting during erection.  
(b) The connections specified in subdivision (a) of this subrule shall be field-bolted  
unless constructability does not allow.  
(9) Steel joists and steel joist girders shall not be used as anchorage points for a  
fall arrest system unless written approval to do so is obtained from a qualified person.  
(10) A bridging terminus point shall be established before bridging is installed.  
(See appendix C)  
History: 2002 AACS; 2007 AACS.  
R 408.42636 Steel joists; attachment; erection.  
Rule 2636. (1) Each end of "K" series steel joists shall be attached to the support  
structure with a minimum of 2 1/8-inch (3 mm) fillet welds 1 inch (25 mm) long or with  
2 1/2-inch (13 mm) bolts, or the equivalent.  
(2) Each end of "LH" and "DLH" series steel joists and steel joist girders shall be  
attached to the support structure with a minimum of 2 1/4-inch (6 mm) fillet welds 2  
inches (51 mm) long, or with 2 3/4-inch (19 mm) bolts, or the equivalent.  
(3) Except as provided in subrule (4) of this rule, each steel joist shall be attached to  
the support structure, at least at 1 end on both sides of the seat, immediately upon  
placement in the final erection position and before additional joists are placed.  
(4) Panels that have been preassembled from steel joists with bridging shall be  
attached to the structure at each corner before the hoisting cables are released.  
(5) Both sides of the seat of 1 end of each steel joist that requires bridging under  
tables A and B shall be attached to the support structure before hoisting cables are  
released.  
(6) For joists that are more than 60 feet long, both ends of the joist shall be  
attached as specified in this rule before the hoisting cables are released.  
(7) On steel joists that do not require erection bridging under tables A and B, only  
1 employee shall be allowed on the joist until all bridging is installed and anchored.  
Tables A and B read as follows:  
Table A–Erection Bridging for Short Span Joists  
Joist  
8L1  
Span  
NM  
NM  
23-0  
Joist  
Span  
40-0  
40-0  
36-0  
Joist  
Span  
22K10  
22K11  
24K4  
14KCS1 NM  
14KCS2 NM  
14KCS3 NM  
10K1  
12K1  
Page 17  
12K3  
12K5  
14K1  
14K3  
14K4  
14K6  
16K2  
16K3  
16K4  
16K5  
16K6  
16K7  
16K9  
18K3  
18K4  
18K5  
18K6  
18K7  
18K9  
18K10  
20K3  
20K4  
20K5  
20K6  
20K7  
20K9  
20K10  
22K4  
22K5  
22K6  
22K7  
22K9  
NM  
NM  
27-0  
NM  
NM  
NM  
29-0  
30-0  
32-0  
32-0  
NM  
NM  
NM  
31-0  
32-0  
33-0  
35-0  
NM  
NM  
NM  
32-0  
34-0  
34-0  
36-0  
39-0  
39-0  
NM  
34-0  
35-0  
36-0  
40-0  
40-0  
24K5  
24K6  
24K7  
24K8  
24K9  
24K10  
24K12  
26K5  
26K6  
26K7  
26K8  
26K9  
26K10  
26K12  
28K6  
28K7  
28K8  
28K9  
28K10  
28K12  
30K7  
30K8  
30K9  
30K10  
30K11  
30K12  
38-0  
39-0  
43-0  
43-0  
44-0  
NM  
16KCS2 NM  
16KCS3 NM  
16KCS4 NM  
16KCS5 NM  
18KCS2 35-0  
18KCS3 NM  
18KCS4 NM  
18KCS5 NM  
20KCS2 36-0  
20KCS3 39-0  
20KCS4 NM  
20KCS5 NM  
22KCS2 36-0  
22KCS3 40-0  
22KCS4 NM  
22KCS5 NM  
24KCS2 39-0  
24KCS3 44-0  
24KCS4 NM  
24KCS5 NM  
26KCS2 39-0  
26KCS3 44-0  
26KCS4 NM  
26KCS5 NM  
28KCS2 40-0  
28KCS3 45-0  
28KCS4 53-0  
28KCS5 53-0  
30KCS3 45-0  
30KCS4 54-0  
30KCS5 54-0  
NM  
38-0  
39-0  
43-0  
44-0  
45-0  
49-0  
NM  
40-0  
43-0  
44-0  
45-0  
49-0  
53-0  
44-0  
45-0  
45-0  
50-0  
52-0  
54-0  
10KCS1 NM  
10KCS2 NM  
10KCS3 NM  
12KCS1 NM  
12KCS2 NM  
12KCS3 NM  
Page 18  
NM = Not Mandatory  
Table B–Erection Bridging for Long Span Joists  
Joist  
Span  
Joist  
Span  
18LH02 33-0  
18LH03 NM  
18LH04 NM  
18LH05 NM  
18LH06 NM  
18LH07 NM  
18LH08 NM  
18LH09 NM  
28LH06 42-0  
28LH07 NM  
28LH08 NM  
28LH09 NM  
28LH10 NM  
28LH11 NM  
28LH12 NM  
28LH13 NM  
47-0  
32LH06  
through  
through  
through  
20LH02 33-0  
20LH03 38-0  
20LH04 NM  
20LH05 NM  
20LH06 NM  
20LH07 NM  
20LH08 NM  
20LH09 NM  
20LH10 NM  
60-0  
47-0  
32LH07  
60-0  
55-0  
32LH08  
60-0  
NM through 60-  
0
32LH09  
32LH10  
32LH11  
32LH12  
32LH13  
32LH14  
NM through 60-  
0
NM through 60-  
0
NM through 60-  
0
NM through 60-  
0
NM through 60-  
0
Page 19  
NM through 60-  
0
24LH03 35-0  
24LH04 39-0  
24LH05 40-0  
24LH06 45-0  
24LH07 NM  
24LH08 NM  
24LH09 NM  
24LH10 NM  
24LH11 NM  
28LH05 42-0  
32LH15  
36LH07  
36LH08  
36LH09  
36LH10  
36LH11  
36LH12  
36LH13  
36LH14  
36LH15  
47-0  
60-0  
through  
through  
through  
47-0  
60-0  
57-0  
60-0  
NM through 60-  
0
NM through 60-  
0
NM through 60-  
0
NM through 60-  
0
NM through 60-  
0
NM through 60-  
0
NM = Not Mandatory  
(8) Employees shall not be allowed on steel joists where the span of the steel joist  
is equal to or greater than the span shown in tables A and B, except in accordance with  
subrules (10), (11), (12), (13), (14), and (15) of this rule.  
(9) When permanent bridging terminus points cannot be used during erection,  
additional temporary bridging terminus points are required to provide stability. (See  
appendix C)  
(10) If the span of the steel joist is equal to or greater than the span shown in tables  
A and B, then all of the following provisions shall apply:  
(a) A row of bolted diagonal erection bridging shall be installed near the midspan of  
the steel joist.  
(b) Hoisting cables shall not be released until the bolted diagonal erection  
bridging specified in subdivision (a) of this subrule is installed and anchored.  
(c) Not more than 1 employee shall be allowed on spans of steel joist that is equal to  
or greater than the span shown in tables A and B, until all other bridging is installed and  
anchored.  
Page 20  
(11) If the span of the steel joist is not less than 60 feet (18.3 m) and not more than  
100 feet (30.5 m), then all of the following provisions shall apply:  
(a) All rows of bridging shall be bolted diagonal bridging.  
(b) Two rows of bolted diagonal erection bridging shall be installed near the third  
points of the steel joist.  
(c) Hoisting cables shall not be released until bolted diagonal erection bridging is  
installed and anchored.  
(d) Not more than 2 employees shall be allowed on spans of steel joist not less than  
60 feet and not more than 100 feet until all other bridging is installed and anchored.  
(12) If the span of the steel joist is not less than 100 feet (30.5 m) and not more than  
144 feet (43.9 m), then all of the following provisions shall apply:  
(a) All rows of bridging shall be bolted diagonal bridging.  
(b) Hoisting cables shall not be released until all bridging is installed and anchored.  
(c) Not more than 2 employees shall be allowed on spans of steel joist that are not  
less than 100 feet and not more than 144 feet until all bridging is installed and anchored.  
(13) For steel members spanning more than 144 feet (43.9 m), the erection methods  
used shall be in accordance with R 408.42628 and R 408.42629.  
(14) If any steel joist specified in subrules (6), (10), (11), and (12) of this rule is a  
bottom chord bearing joist, then a row of bolted diagonal bridging shall be provided  
near the supports. The bridging shall be installed and anchored before the hoisting  
cables are released.  
(15) If bolted diagonal erection bridging is required by this rule, then all the  
following provisions shall apply:  
(a) The bridging shall be indicated on the erection drawing.  
(b) The erection drawing shall be the exclusive indicator of the proper placement  
of the bridging.  
(c) Shop-installed bridging clips, or functional equivalents, shall be used where the  
bridging bolts to the steel joists.  
(d) If 2 pieces of bridging are attached to the steel joist by a common bolt, then  
the nut that secures the first piece of bridging shall not be removed from the bolt for  
the attachment of the second.  
(e) Bridging attachments shall not protrude above the top chord of the steel joist.  
History: 2002 AACS; 2007 AACS.  
R 408.42638 Landing and placing loads.  
Rule 2638. (1) During the construction period, an employer placing a load on steel  
joists shall ensure that the load is distributed so as not to exceed the carrying capacity  
of any steel joist.  
(2) Except for subrule (4) of this rule, a construction load is not allowed on the steel  
joists until all bridging is installed and anchored and all joist-bearing ends are  
attached.  
(3) The weight of a bundle of joist bridging is not more than a total of 1,000  
pounds (454 kg). A bundle of joist bridging shall be placed on a minimum of 3 steel  
joists that are secured at 1 end. The edge of the bridging bundle shall be positioned  
within 1 foot (.30 m) of the secured end.  
Page 21  
(4) A bundle of decking shall not be placed on steel joists until all bridging  
has been installed and anchored and all joist bearing ends attached, unless all of the  
following conditions are met:  
(a) The employer has first determined from a qualified person and  
documented in a site-specific erection plan that the structure or portion of the  
structure is capable of supporting the load.  
(b) The bundle of decking is placed on a minimum of 3 steel joists.  
(c) The joists supporting the bundle of decking are attached at both ends.  
(d) At least 1 row of bridging is installed and anchored.  
(e) The total weight of the bundle of decking is not more than 4,000 pounds  
(1816 kg).  
(f) Placement of the bundle of decking shall be in accordance with subrule (5)  
of this rule.  
(5) The edge of the construction load shall be placed within 1 foot (.30 m) of the  
bearing surface of the joist end.  
History: 2002 AACS.  
R 408.42640 Installation of metal decking.  
Rule 2640. (1) Except as provided in R 408.42648(1), metal decking shall be laid  
tightly and immediately secured upon placement to prevent accidental movement  
or displacement.  
(2) During initial placement, metal decking panels shall be placed to ensure full  
support by structural members.  
(3) Derrick floors. A derrick floor shall be fully decked or planked and the steel  
member connections completed to support the intended floor loading.  
(4) Temporary loads placed on a derrick floor shall be distributed over the  
underlying support members so as to prevent local overloading of the deck material.  
(5) Temporary flooring shall comply with all of the following provisions:  
(a) Consist of either wood planking which is not less than  
2
inches thick,  
undressed, full size or metal decking or grating of equivalent strength.  
(b) Cover the entire area, except for access openings.  
(c) Be secured against displacement.  
(d) Be capable of carrying the maximum intended working load.  
(6) Planking of temporary floors shall comply with both of the following  
provisions:  
(a) Extend beyond an end bearer not less than 6 inches nor more than 12 inches.  
(b) Overlap any intermediate bearer by a minimum of 12 inches. (See figure 1.)  
Figure 1 reads as follows:  
Page 22  
Figure for 408.42640  
(7) When gathering and stacking temporary floor planks, the planks shall be  
removed successively, working toward the last panel of the temporary floor so that the  
work is always done from the planked floor.  
(8) When gathering and stacking temporary floor planks from the last panel,  
employees assigned to such work shall be protected as specified in R 408.42645.  
History: 1985 AACS; 2002 AACS.  
R 408.42642 Rescinded.  
History: 1985 AACS; 2002 AACS.  
R 408.42643 Systems-engineered metal buildings.  
Rule 2643. (1) All of the requirements of this part apply to the erection of systems  
engineered metal buildings, except for R 408.42626, R 408.42634, R 408.42636, and  
R 408.42638.  
(2) Each structural column shall be anchored by a minimum of 4 anchor rods, or  
anchor bolts.  
(3) Rigid frames shall have 50% of their bolts or the number of bolts specified by  
the manufacturer, whichever is greater, installed and tightened on both sides of the web  
adjacent to each flange before the hoisting equipment is released.  
(4) Construction loads shall not be placed on any structural steel framework unless  
the framework is safely bolted, welded, or otherwise adequately secured.  
(5) In girt and eave strut-to-frame connections, when girts or eave struts share  
common connection holes, at least 1 bolt with its wrench-tight nut shall remain connected  
to the first member unless a manufacturer-supplied, field-attached seat or similar  
connection device is present to secure the first member so that the girt or eave strut is  
always secured against displacement.  
(6) Both ends of all steel joists or cold-formed joists shall be fully bolted or welded  
to the support structure before any of the following:  
(a) Releasing the hoisting cables.  
(b) Allowing an employee on the joists.  
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(c) Allowing any construction loads on the joists.  
(7) Purlins and girts shall not be used as an anchorage point for a fall arrest system  
unless written approval is obtained from a qualified person.  
(8) Purlins may only be used as a walking/working surface when installing safety  
systems, after all permanent bridging has been installed and fall protection is provided.  
(9) Construction loads may be placed only within a zone that is within 8 feet (2.5 m)  
of the centerline of the primary support member.  
History: 2002 AACS; 2014 AACS.  
R 408.42644 Falling object protection.  
Rule 2644. (1) Securing loose items aloft. All materials, equipment, and tools that are  
not in use while aloft shall be secured against accidental displacement.  
(2) Protection from falling objects other than materials being hoisted. The controlling  
contractor shall bar other construction processes below steel erection unless overhead  
protection for the employees below is provided.  
History: 2002 AACS; 2013 AACS.  
R 408.42645 Fall protection.  
Rule 2645. (1) Except as provided by subrule (3) of this rule, each employee  
engaged in a steel erection activity who is on a walking/working surface with an  
unprotected side or edge more than 15 feet (4.6 m) above a lower level shall be  
protected from fall hazards by guardrail systems, safety net systems, personal fall  
arrest systems, positioning device systems, or fall restraint systems.  
(2) Perimeter safety cables. On multistory structures, perimeter safety cables  
shall be installed at the final interior and exterior perimeters of the floors as soon  
as the metal decking has been installed.  
(3) Connectors and employees working in controlled decking zones  
protected from fall hazards as provided in R 408.42646 and R 408.42648.  
shall be  
History: 2002 AACS.  
R 408.42646 Connectors.  
Rule 2646. (1) Each connector shall be in compliance with  
following provisions:  
all  
of the  
(a) Be protected in accordance with R 408.42645(1) from fall hazards of more  
than 2 stories or 30 feet (9.1 m) above a lower level, whichever is less.  
(b) Have completed connector training in accordance with R 408.42655(2).  
(c) Be provided, at heights of more than 15 and up to 30 feet above a lower  
level, with a personal fall arrest system, positioning device system, or fall restraint  
system and wear the equipment necessary to be able to be tied off; or be provided with  
other means of protection from fall hazards in accordance with R 408.42645(1).  
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History: 2002 AACS.  
R 408.42648 Controlled decking zone (CDZ).  
Rule 2648. (1) A controlled decking zone may be established in that area of the  
structure of more than 15 and up to 30 feet above a lower level where metal decking is  
initially being installed and forms the leading edge of a work area. In each CDZ, all of  
the following provisions shall apply:  
(a) Each employee working at the leading edge in a CDZ shall be protected from  
fall hazards of more than 2 stories or 30 feet (9.1 m), whichever is less.  
(b) Access to a CDZ shall be limited to only those employees engaged in leading  
edge work.  
(c) The boundaries of a CDZ shall be designated and clearly marked. The CDZ  
shall not be more than 90 feet (27.4 m) wide and 90 (27.4 m) feet deep from any  
leading edge. The CDZ shall be marked by the use of control lines or the equivalent.  
Examples of acceptable procedures for demarcating CDZs can be found in appendix D.  
(d) Each employee working in a CDZ shall have completed CDZ training in  
accordance with R 408.42655(3).  
(e) Unsecured decking in a CDZ shall not be more than 3,000 square feet (914.4  
m2).  
(f) Safety deck attachments shall be performed in the CDZ from the leading edge  
back to the control line and shall have not less than 2 attachments for each metal decking  
panel.  
(g) Final deck attachments and installation of shear connectors shall not be  
performed in the CDZ.  
History: 2002 AACS; 2007 AACS.  
R 408.42650 Rescinded.  
History: 1985 AACS; 2002 AACS.  
R 408.42651 Criteria for fall protection equipment; custody of fall protection.  
Rule 2651. (1) Guardrail systems, safety net systems, personal fall arrest systems,  
positioning device systems and their components shall conform to the criteria in  
Construction Safety Standard Part 45 "Fall Protection," as referenced in R 408.42602.  
(See appendix G)  
(2) Fall arrest system components shall be used in fall restraint systems and shall  
conform to the criteria in Construction Safety Standard Part 45 "Fall Protection," as  
referenced in R 408.42602. (See appendix G) Either body belts or body harnesses shall  
be used in fall restraint systems.  
(3) Perimeter safety cables shall meet the criteria for guardrail systems in  
Construction Safety Standard Part 45 "Fall Protection," as referenced in R 408.42602.  
(See appendix G)  
(4) Fall protection provided by the steel erector shall remain in the area where steel  
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erection activity has been completed, to be used by other trades, only if the controlling  
contractor or its authorized representative has done both of the following:  
(a) Directed the steel erector to leave the fall protection in place.  
(b) Inspected and accepted control and responsibility of the fall protection before  
authorizing persons other than steel erectors to work in the area.  
History: 2002 AACS; 2007 AACS; 2014 AACS.  
R 408.42653 Training.  
Rule 2653. (1) Training personnel. Training required by this rule shall be  
provided by a qualified person or persons.  
(2) An employer shall provide a training program for all employees exposed to  
fall hazards. The program shall include training and instruction in all of the following  
areas:  
(a) The recognition and identification of fall hazards in the work area.  
(b) The use and operation of all of the following:  
(i) Guardrail systems, including perimeter safety cable systems.  
(ii) Personal fall arrest systems.  
(iii) Positioning device systems.  
(iv) Fall restraint systems.  
(v) Safety net systems.  
(vi) Other protection to be used.  
(c) The correct procedures for erecting,  
maintaining,  
disassembling, and  
inspecting the fall protection systems to be used.  
(d) The procedures to be followed to prevent falls to lower levels and through  
or into holes and openings in walking/working surfaces and walls.  
(e) The fall protection requirements of this part.  
History: 2002 AACS.  
R 408.42654 Rescinded.  
History: 1985 AACS; 2002 AACS.  
R 408.42655 Special training.  
Rule 2655. (1) An employer shall ensure that each employee who performs multiple  
lift rigging has been provided training in both of the following areas:  
(a) The nature of the hazards associated with multiple lifts.  
(b) The proper procedures and equipment to perform multiple lifts required by  
R 408.42610.  
(2) An employer shall ensure that each connector has been provided training in all of  
the following areas:  
(a) The nature of the hazards associated with connecting.  
(b) The establishment, access, proper connecting techniques, and work practices  
required by R 408.42629(1) and (2) and R 408.42646.  
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(c) Specific training on personnel hoisting as prescribed in Construction Safety  
Standard Part 28. "Personnel Hoisting in Steel Erection," as referenced in R 408.42602.  
(3) Where CDZs are being used, an employer shall assure that each employee has  
been provided training in both of the following areas:  
(a) The nature of the hazards associated with work within a controlled decking zone.  
(b) The establishment, access, proper installation techniques, and work practices  
required by R 408.42620, R 408.42622, R 408.42640, and R 408.42648.  
History: 2002 AACS; 2007 AACS; 2014 AACS.  
R 408.42656 Rescinded.  
History: 1985 AACS; 2002 AACS.  
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