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The New SENRAC Rule - PowerPoint PPT Presentation

The New SENRAC Rule For Steel Erection This Presentation Covers… Indiana Effective Dates… Indiana Component Requirements… Overview of the Subpart R Standards… Checklist of Required Documentations… Overview of Presentation. The new Subpart R .750 Scope – who is and is not covered.

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The new senrac rule l.jpg

The New SENRAC Rule

For Steel Erection

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This Presentation Covers…

  • Indiana Effective Dates…

  • Indiana Component Requirements…

  • Overview of the Subpart R Standards…

  • Checklist of Required Documentations…

  • Overview of Presentation.

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The new Subpart R

.750 Scope – who is and is not covered.

.751 Definitions. (as needed)

.752 Site layout, site specific erection plan and construction sequence.

.753 Hoisting and Rigging.

.754 Structural steel assembly.

.755 Column Anchorage.


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The new Subpart R.

.756 Beams and Columns.

.757 Open Web Steel Joists.

.758 Systems-engineered metal buildings.

.759 Falling object protection.

.760 Fall Protection.

.761 Training.

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Indiana Effective Dates…

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Indiana Register, Volume 25, Number 4, January 1, 2002INDIANA DEPARTMENT OF LABORNOTICE OF CHANGES INENFORCEMENT OF STEEL ERECTION REGULATIONSThe federal Occupational Safety and Health Administration, effective January 18, 2002, has revised the steel erectionregulations contained in 29 CFR 1926, Subpart R. Effective 60 days after January 18, 2002, on March 19, 2002, the IndianaDepartment of Labor will be enforcing those regulations in Indiana.A number of provisions in the final rule, 29 CFR 1926, Subpart R, address the safety of certain structural components and theseprovisions are known as “component requirements.” Component requirements contain requirements for structural components tohelp ensure that the structure can be erected safely…

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Component RequirementsThe new effective date, March 19, 2001, for the steel erection standards contained in 1926 Subpart R will be applied to thecomponent requirements in the following manner:(1) Where a building permit was obtained before the final rule was published on January 18, 2001, the component requirementslisted above will not apply to the work project.(2) If the steel erection work in question began on or before November 15, 2001, the component requirements of the final rule,listed above, will not be applied.

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("component requirements")

Contain requirements for these components to help ensure that the structure can be erected safely.

For example, there are provisions that prohibit shear connectors on members before they are erected (§ 1926.754(c)(1)(i)); require all columns to be anchored by a minimum of 4 anchor bolts, which must meet specified strength requirements (§ 1926.755(a)) (there is a comparable requirement for systems-engineered metal buildings, § 1926.758(b)); set requirements for double connections (§ 1926.756(c)(1)) (there is a comparable requirement for systems-engineered metal buildings § 1926.758(e)); require column splices to be at a specified height and meet a strength requirement (§ 1926.756(d)); require perimeter columns to have holes or other devices for perimeter safety cables (§ 1926.756(e)); in some instances require a vertical stabilizer plate to stabilize steel joists (§ 1926.757(a)(1)(i)); require certain joists to be strong enough to allow one employee to release the hoisting cable without the need for erection bridging (§ 1926.757(a)(3)), and require certain joists to be fabricated to allow for field bolting during erection (§ 1926.757(a)(8)(i)).

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Subpart R

Steel Erection

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What is SENRAC?







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Generally, Steel erection activities include working on or from structural steel, steel joists, or metal buildings!

Best Practice…See 750 (b)(1)&(2)

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This Subpart does not cover electrical transmission towers, communication and broadcast towers or tanks

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  • Site layout

  • Site-specific erection plan

  • Construction sequence…

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.752(a) Approval to begin steel erection - To be provided from the controlling contractor in writing.

Best Practice… Have Erector sign off & Keep a copy!

Notification requires…

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  • The concrete in the footings, piers and walls and the mortar in the masonry piers and walls must meet at least 75% minimum compressive strength. (or sufficient ASTM method)

    Best Practice… Maintain a copy from test lab.

    (2) Anchor bolts that have been repaired, replaced or modified must meet .755 (b).

    Best Practice… Maintain a copy from S.E.O.R.

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Steel Erector must receive written notification prior to start up!

.752(b) Commencement of steel erection…

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.752(c) Site layout…Controlling Contractor is responsible for…

(1) Adequate and safe access site roads for vehicular and pedestrian traffic

(2) Maintaining an adequate firm, graded and drained work and storage area

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.752(d) Pre-planning of overhead hoisting operations…

To ensure that the requirements of .753(d) (working under loads) are met

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.752(e)Site-specific erection plan – S.S.E.P.

A qualified person may develop alternate means and methods that provide employee protection Where employers elect…

Best Practice…See Appendix A.

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Qualified…One who, by possession of recognized degree, certificate, or professional standing, or who 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.

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Hoisting and Rigging…

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.753(a) All the provisions within subpart N apply except -.550(g)(2)“the use of a crane or derrick to hoist employees on a personnel platform is prohibited…”

Best Practice… Review .550(g)

(b) paragraphs (c) thru (e) of this section also apply…

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.753(c) General-(1) Pre-shift visual crane inspection…

(i) Cranes being used in steel erection activities shall be inspected prior to each shift by a competent person & observed during operation

At a minimum shall include the following...

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Competent Person…One who is capable of identifying existing and predictable hazards in the surroundings or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to correct them.

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(A) All control mechanisms for maladjustments

(B) Control and drive train for wear and contamination

(C) Safety Devices

(D) Pressurized lines

(E) Hooks and latches

(F) Wire rope reeving


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(G) Electrical

(H) Hydraulics

(I) Tires

(J) Proper ground conditions

(K) Leveling for the lift

(L) Leveling after each move and setup

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(ii) Competent person to access for deficiencies which are hazardous

(iii) Hazardous equipment shall be removed from service until corrected… Tagged?

(iv) The operator shall be responsible for those operations under the operator’s control. (stoppage and refusal)

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.753(c) (2) Rigging shall be inspected by a qualified rigger prior to each lift

(3) No headache ball, hook or load riding!

(4) Cranes or derricks may be used to hoist personnel during steel erection in accordance with .550 – except for .550(g)(2)

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.753(c) (5) Safety latches on hooks shall be kept operable…

(i) Unless a qualified rigger has determined that the hoisting and placing of purlins and a single joist can be performed more safely

(ii) When equivalent protection is provided as stated in the (S.S.E.P.)

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.753(d) Working Under Loads.

(1) Pre-plan routes so no employee is required to work below except when…

(i) Performing initial connections

(ii) Hooking or unhooking the loads

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.753(d) (2) When working under suspended loads…

(i) Rig loads to prevent shifting

(ii) Use hooks with self-closing safety latches

(iii) Only qualified riggers are allowed to rig

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.753(e) Multiple Lift Rigging Procedure

(1) Only allowed when…

(i) Multiple lift rigging assembly is used

(ii) Five or less members are hoisted

(iii) Only beams or similar structures

(iv) All employees engaged have been trained

(v) Crane manufacture specified

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Multiple Lift “Rigging”…A rigging assembly manufactured by wire rope rigging suppliers that facilitates the attachment of up to five independent loads to the hoist rigging of a crane.

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Multiple lift

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.753(e)(2) Rigging assembly shall have a 5 to 1 safety factor, certified by the manufacture or qualified rigger.

(3) Total load shall not exceed…

(i) Rated capacity of the load charts

(ii) Rigging capacity of the riggers rating chart

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.753(e)(4) Rigging assembly – shall be riggedwith members…

(i) Attached at their center of gravity

(ii) Rigged from the top down

(iii) Rigged at least 7ft. apart

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.753(e)(5) Set the Structural load from the bottom up

(6) Whenever the load is over connectors –

use controlled lowering!

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Structural steel assembly

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.754(a) Stability is required to be maintained at all times during the construction process.What it’s all about!

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.754(b) For multi-story structures…

(1) No more than 8 stories between the erection floor and the upper-most permanent floor

(2) No more than four floors or 48 ft. (which ever is less of unfinished connecting)

(3) Full floor or nets are needed within two stories or 30 feet (which ever is less)…

unless tied off 100%

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(i)Tripping hazards shall not be attached to the top flange of the beams/joists until W/W surface has been installed

(ii) Shear connectors to be installed on decks in accordance with .760(c)(8)… (using fall protection)

.754(c) Walking/working surfaces… (1) shear connectors and similar devices…

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Floor shear connectors

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Bridge shear connectors

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754 (c) (2) Slip resistance – decking…Reserved.

(3) Slip resistance – skeletal… Federal - July 18, 2006

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.754(d) Plumbing up…

(1) Such equipment shall be installed when deemed necessary by the competent person

(2) Properly install such equipment prior to loading the structure with material

(3) Remove such equipment only with the approval of the competent person

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Typical Plumbing-up detail

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Typical plumbing up…

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.754(e) Metal decking…(1) hoisting, landing & placing – decking bundles…

(i) Bundle packaging and strapping can’t be used

(ii) Secure all loose items placed atop the loads

(iii) Land in accordance with .757(e)(4)…(Sufficient structural strength)

(iv) Framing members require sufficient support

(v) Keep decking secured against displacement

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.754(e)(2) Metal decking at roof and floor holes…

(i) Framed openings shall have structural members turned down (check design constraints & constructibility)

(ii) Roof and floor holes shall be decked over or protect employees in accordance with .760(a)(1)… (fall protection)

(iii) Cut holes only immediately prior to being permanently finished or for it’s intended use (strength requirements!) or immediately cover

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Deck Holes… Means a gap or void more than two inches in its least dimension and less than 12 inches in its greatest dimension

Deck Opening… means a gap or void 12 inches or more in its least dimension – skylights?

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…should be turned down.

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Typical deck hole…

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.754 (e)(3) Covering roof and floor openings…

(i) Covers shall withstand 2x the weight imposed

(ii) Covers shall be secured

(iii) High – vis paint or marked “HOLE” OR “COVER”

(iv) Smoke dome & skylights – sufficient strength

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.754 (e)(4) Fall protection is required at decking gaps around columns.

(5) Installation of metal decking…

(i) Laid tight and secured – Or in accordance with .760(c)… (Controlled Decking Zone)

(ii) Placed to ensure full support by structural members during initial placement

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.754 (e)(6) Derrick Floors…

(i) Shall be full decked/planked with all support member connection completed

(ii) Temp. loads shall be distributed over the underlying support members

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Derrick Floor…An elevated floor of a building or structure that has been designated to receive hoisted pieces of steel prior to the final placement.

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Column Anchorage…

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.755(a) General requirements for erection stability…

(1)All columns to be anchored by four bolts minimum

(2) Each anchor bolt assembly, column-to-base plate and column foundation shall be capable of supporting 300lbs. 18 in. from the outermost face of the column

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Column stability…

300 lbs. min.

300 lbs.


18 in.

18 in.

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.755 (a)(3) Columns shall be set on adequate materials intended to transfer the loads.

(4) Guying and bracing of the columns shall be evaluated by a competent person.

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Typical column footings…

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.755(b) Repair, replacement or field modifications…

(1) Needs approval of project structural engineer

(2) The controlling contractor shall provide written notification to the steel erector

Best Practice…Keep Copies!

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Beams and columns

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.756(a) General…

(1) Solid web members need at least two bolts per connection & drawn-up before released.

(2) Competent person to assess if more anchorage is required for cantilevered members

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.756(b) diagonal bracing…

Solid web members needs to be secured by at least one bolt per connection & also drawn-up

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.756 (c)(1) Double connections (columns or beam webs) require one bolt to remain securely connected to the first member while securing the second memberBest Practice… see Appendix H

Unless… a seat or equivalent device is used such as clipped end (notches on the top or bottom) or staggered connections (extra hole in the column web)

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Double Connection…

An attachment method where the connection point is intended for two pieces of steel which share common bolts on either side of a central piece

Ever heard of a “Double double”?

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Double connection – staggered end

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Double connection seat…

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Another View…

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Non-seated double connection…

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.756(c)(2) If a seat or equivalent device is used, it needs to be of sufficient strength - and adequately attached to support both the supporting member and the first member

(d) Each column splice needs to resist a 300 lb. eccentric load 18 in. from the extreme outer face from the top of the column

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Column splice…

18 in.

300 lbs.


300 lbs. min.

18 in.

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.756(e)(1) The perimeter columns need to extend up at least 48 in. above the finished floor prior to the erection of the next tier (fall protection)

(2) 42 to 45 in. above finished floor - attachment systems are needed along the perimeter columns to allow for the safety cables

Best Practice… See Appendix F

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Open web steel joists

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“Bar joist” –

secondary load carrier

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Steel joist – primary load carrier

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.757(a) General(1) Where joists and columns are not framed in at least two directions with solid web members, the joist shall be field bolted at the column…

(a)(1)(i) By using a 6”X6” vertical stabilizer plate extending 3 in. below the bottom chord with a 13/16 hole to provide for guying or plumbing

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Vertical stabilizer plate

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.757(a)(1)(ii) The bottom chords at the columns need to be stabilized to prevent rotation

(iii) Hoisting cables shall not be released until the joist seats are bolted and the bottom chord is restrained

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.757(a)(2) Where constructibility does not allow a joist to be installed at the column…

(i) Use alternate means - installed on both sides near column, and…

(a) Provide equivalent stability as above

(b) Be designed by a qualified person

(c) Be shop installed

(d) Be included in the erection drawings

(ii) Hoisting cables not to be released until joist is bolted and secured

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.757(a)(3) “Tie” or “OSHA” Joists < 60’ shall be designed with enough strength to allow one person onto it to release hoisting line without need of erection bridging.

Note: Implementation of this provision is delayed to July 18, 2003

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.757(a)(4) If joists set at or near columns span more than 60 feet, they need to have all bridging installed and set in tandem – or use S.S.E.P.

(5) Support structure to be stabilized first before placing joist or girder atop

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.757(a)(6) Secure such loads to prevent displacement upon landing

(7) Get approval from the project structural engineer of record before making modifications to the joist/girder that would affect the strength

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.757(a)(8)(i) Connections of individual joists to structures in bays of 40 ft.+ need to be fabricated for field bolting. Not pre-assembled joist panels…

(ii) These connections shall be field bolted unless of constructibility

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.757 (a)(9) Qualified person is required to submit written approval for joists/girders to be used for anchorage

(10) A bridging terminus point needs to be established before bridging is installed

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Bridging terminus point… A wall, beam, tandem joists, etc at an end or intermediate points of a line of bridging that provides an anchor point for the joist bridging

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Steel joists connected to bridging terminus points

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.757(b) Attachments…(1) Each end of “K” series joists need at least two 1/8 x 1 in. long welds or two ½ in. bolts

(2) “LH” or “DLH” joists/girders require two ¼ X 2 in. long welds or two ¾ in. bolts

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Bar joist seat connection…

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.757(b) attachments…(3) Each end of the joist needs securing at least at one end at both sides of the seat upon placement – except when…

(4) Pre-assembled panels with bridging shall be attached at each corner before the hoisting cables are released

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.757 (c) Erection of joists… (1) Use tables A & B to assess for bridging requirements…

(2) For joists over 60 ft. attach both ends as stated in (b) (attachment) and comply with (d) (erection bridging) before releasing hoisting cables

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757(c) Erection of joists… (3) Only one employee is allowed on the joists that do not require erection bridging until all permanent bridging is installed and anchored

(4) Employees are not allowed on joists who’s span is greater than or equal to those in tables A&B

(5) Where permanent bridging terminus bridging points can’t be used – use temporary ones

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.757(d)Erection bridging…(1) Where the span is greater than tables A&B

(i) A row of bolted diagonal erection bridging is needed near the midspan of the joist

(ii) Keep hoisting cables attached until such bridging is attached and anchored

(iii) No more than one employee may access the spans until (i) and (ii) are met

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Note… arrow indicates “row” direction of bridging

Diagonal erection bridging bolted to joists…

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Note Horizontal Bridging

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.757(d)Erection bridging…(2) Where the span is over 60 ft. thru 100 ft.

(i) All rows of bridging shall be bolted diagonal

(ii) Two rows of such shall be installed near the third points of the joists

(iii) Hoisting cables not to be released until all bridging is installed and anchored

(iv) No more than two employees are allowed until all other bridging is installed & anchored

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.757(d)Erection bridging…(3) Where the span is 100ft. Thru 144ft…

(i)All rows of bridging shall be bolted diagonal

(ii) Hoisting cables not to be released until all bridging is installed and anchored

(iii) No more than two employees are allowed until all other bridging is installed & anchored

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.757(d)Erection bridging…(4) For members over 144ft. use methods in .756 (beams and columns)

(5) Where any joist is a bottom chord bearing joist, provide a row of bolted diagonal bridging near the supports. Anchor the bridging before releasing hoisting cables

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.757(d) Erection bridging…(6) Where bolted diagonal bridging is required…

(i) It is also required on the erection drawing

(ii) It shall be the exclusive indicator for placement


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.757(d)(6)Erection bridging…(iii) Shop installed bridging clips (or equivalent) shall be used where bridging bolts to joist

(iv) Where two bridgings are attached by a common bolt, the nut shall not be removed to attach the second bridging

(v) Bridging attachments shall not protrude above the top chord of the joist

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Typical bridging clip…

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.757(e) Landing and placing loads…(1) The employer placing the load is responsible to see that it does not exceed the carrying capacity

(2) No construction loads are allowed on the joists until all bridging is installed and bearing ends of joists are installed

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.757(e) Landing and placing loads…(3) 1000lb. Or less for a bundle of joist bridging and each shall be placed on at least three secured joists

(4) No bundle of decking shall be placed on joists until all bridging, and bearing ends are secured unless…

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757(e)(4) Landing and placing loads…(i) The employer through the S.S.E.P. has determined that the structure can support the load

(ii) The bundles of decking need placement on 3 or more joists

(iii) The joists supporting the bundles are attached at both endsand…

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757(e) Landing and placing loads…(4)cont…

(iv) At least one row of bridging is anchored

(v) The total weight of the bundle of decking does not weigh more than 4000lb.

(vi) Placement of the bundle shall be…

(5) Loads shall be placed within one foot of the end of the bearing end of the joist

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Critical lift

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metal buildings

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Typical systems engineered building

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.758(a) All of the subparts apply except .755 (column anchorage) and .757 (open web joists)

(b) Four anchor bolts needed for each structural column

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.758(c) Rigid frames need at least 50% (specified) secured on both sides of the web adjacent to the flange before hoisting equipment is released

(d) Construction loads shall not be placed on any structural steel framework unless the framework is secured

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.758(e) When girts or eave struts share common connection holes, at least one secured bolt shall remain connected to the first member – or manufacture alternative

(f) Both ends of joists shall be fully secured before…

(1) Releasing hoisting cables

(2) Allowing an employee on the joist

(3) Allowing construction loads

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.758(g) Qualified person needs to assesspurlins/girts as anchorage points

(h) Purlins to be used as W/W surfaces when installing safety, after permanent bridging is installed and fall protection is provided

(i) Construction loads to be within 8ft. Of the centerline of the primary support member

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Falling Object Protection

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.759(a) Secure loose items aloft

(b) Other than the materials being hoisted,The controlling contractor shall bar any work below

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Fall protection

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.760(a)(1) Employees engaged in steel erection activities on a W/W surface more than 15ft. In height require fall protection

(2) Safety cables are required at final interior and exterior perimeter on multi-story structures once decking is placed

(3) Connectors and those working in the controlled decking zone required fall protection as in (b)&(c)…

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Typical Guard rail system…

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Typical Guard rail system…

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.760(b) Connectors…(1) Need fall protection as in (a)(1) if more than 2 stories or 30ft.

(2) Need to have completed connector training

(3) Need to be provided with PFA, positioning or fall restraint systems and wear as necessary when at heights from 15ft. To 30ft. – or other protection

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Rated Shackle and Eye Bolt for anchorage

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Beamer, Glyder, Girder Grip…

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Typical Retractable Lanyards…

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Beamer in use…

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Note installed Stanchion…

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Note the installation…

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Installed Horizontal Lifeline

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100% Point to Point Fall Protection

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Note net in background…

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Horizontal Lifelines…for elevations higher than 30ft.

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.760 (c) Controlled decking zones (CDZ) may be installed between the 15ft. To 30ft. Heights where decking is being initially installed and forms the leading edge.The following shall apply…

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.760(c) Controlled decking zone (1)Two stories or thirty ft. max. whichever is less (2) Only leading edge workers allowed (3) 90’x90’ max. clearly marked boundaries (4) CDZ training completion required and…

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760(c) Controlled decking zone(5) Unsecured decking shall not exceed 3000ft2

(6) Safety deck attachments shall be performed from the leading edge back with two attachments for each panel

(7) Final deck attachments and installation of shear connectors not to be done in the CDZ

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Typical Controlled Decking Zone…

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Leading edge work…

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Safety deck attachment…

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Shear connectors “Nelson Studs”

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Installation of Nelson Studs…

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.760 (d) Criteria for fall protection equipment…(1) As in .502 (Subpart M)for guardrail, safety net and personal fall arrest systems

(2) Fall arrest system components shall be used in fall restraint systems as in .502 (B.B. & harnesses)

(3) Perimeter safety cables also as in .502

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.760(e) Fall protection shall remain where the work has been completed, to be used by other trades.Only if the controlling contractor …

(1) Has directed the erector to leave it in place

(2) Has inspected and accepted control and responsibility prior to others access

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.761(a) Training by qualified personnel only

(b) The training program shall include instruction in the following areas…

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.761(b)(1)The recognition and identification of fall hazards

(2) The use and operation of FP hardware

(3)How to erect, maintain and disassemble & inspect

(4) Procedures to be followed to prevent falls

(5) The fall protection requirements of this subpart

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.761(c) Along with the above (a) & (b) Special training is required for…

(1) Multiple lift rigging procedures

(i) The nature of the hazards associated with(ii) The proper procedures and equipment


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.761(c)(2) Connector procedures

(i) The nature of the hazards associated with

(ii) The establishment, access, proper techniques and work practices

(3) Controlled decking zone procedures(I) The nature of the hazards(ii) The establishment, access, proper installation techniques and practices

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End of Standards…

In closing…

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Required Documentation

.752(a) Approval to Begin from G. C.

.752(a)(1) Concrete Strength from G.C.

.752(a)(2)Modification of Anchor Bolts from G.C.

.752(b) Approval to Begin to Steel Erection from G.C.

.752(e) Site Specific Erection Plan

.753(e)(2) Multiple Lift Rigging Assembly Certification

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More Required Documentation…

.755(b)(1)Approval for any Anchor Bolt Modification

.755(b)(2) Notice of Anchor Bolt from C.C. to Erector

.757(a)(7) Field Modified Joist by Engineer of Record

.757(a)(9) Anchorage to joist by Qualified Person

.757(d)(6)(i) Diagonal Bridging on Erection Drawing

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The new Subpart R

.750 Scope – who is and is not covered.

.751 Definitions. (as needed)

.752 Site layout, site specific erection plan and construction sequence.

.753 Hoisting and Rigging.

.754 Structural steel assembly.

.755 Column Anchorage.


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The new Subpart R.

.756 Beams and Columns.

.757 Open Web Steel Joists.

.758 Systems-engineered metal buildings.

.759 Falling object protection.

.760 Fall Protection.

.761 Training.

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This Presentation Covered…

  • Overview of Presentation…

  • IndianaEffective Dates…

  • Indiana Component Requirements…

  • Overview of the Subpart R Standards…

  • Checklist of Required Documentations…

  • Review of Presentation…

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End of presentation…

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