Erection Techniques-25th Feb09
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Transcript of Erection Techniques-25th Feb09
Highlights
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Steel Erection Final Rule
• Published January 18, 2001
• Implemented January 18, 2002
• Includes exceptions for some provisions
ScopeCovers all employers engaged in steel
erection activitiesContains two lists of activities:
Primary list: All are covered (connecting, bracing, guying…)
Ancillary list: Covered only “when they occur during and are a part of steel erection activities” (sealing, caulking, etc…)
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1926.750(b)
Scope (cont’d)
Does not apply to:Electrical transmission
towers
Communication and broadcast towers
Tanks
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1926.750(a)
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Is the activity at the jobsite listed in 1926.750(b)(1)?
Yes No
IS the activity listed in .750(b)(2)?
Then this activity IScovered by Subpart R
Yes No
Then you must determine if this is going on in conjunction with (during and a part of) steel
erection activities in (b)(1). A question to ask: Does this (b)(2) activity have to be done for steel erection to continue: If yes, and if doneduring (b)(1) activities, then it is covered by
the standard.
Because it is listed in neither(b)(1) nor (b)(2), it is notcovered by the standard.
Key Provisions of the Rule Site layout Hoisting and riggingStructural steel stability
requirementsColumn anchorageBeams and columnsOpen web steel joistsStructural steel
assembly
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Key Provisions of the Rule (cont’d)
Systems-engineered metal buildings
Falling object protectionFall protectionWorker training
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Site Layout Adequate layout area
Adequate access roads
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1926.752(c)
Hoisting and RiggingProvides additional crane safety
for steel erectionMinimizes employee exposure to
overhead loads through pre-planning and work practice requirements
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1926.753
Hoisting and Rigging (cont’d)
Prescribes proper procedures for multiple lifts (Christmas-treeing)
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1926.753(e)
Column AnchorageMinimum 4 anchor bolts per
columnWritten notification of proper
curing of concrete in footings, piers, walls for steel columns
Written notification of adequacy of anchor bolts modified/repaired in the field
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1926.752(a)1926.755
Beams and ColumnsTwo bolts per connection
before releasing hoisting line
Safe procedures for making double connections at columns
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1926.756
Open Web Steel JoistsMinimize the risk of
collapse of lightweight steel joists by:Specifying erection bridging
and method of attachmentRequiring erection bridging
to be anchored to terminus point
Specifying method of placing loads on steel joists
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1926.757
Structural Steel AssemblySpecific work practices:
Hoisting deck bundles
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1926.754
Structural Steel Assembly (cont’d)
Minimizing fall hazards:Trip hazardsInterior
holes/openingsSlip hazards
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1926.754
Shear Connectors
Systems-Engineered Metal Buildings
Requirements to minimize the risk of collapse in the erection of these specialized structures that account for a major portion of steel erection in this country
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1926.758
Falling Object Protection
Provisions that address hazards of falling objects in steel erection
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1926.759
Note: Does not apply to materials being hoisted
Fall Protection Above 30 feet/2 stories: All workers
must be protected, including connectors and deckers
Between 15 and 30 feet/2 stories: Workers must be protected EXCEPT:ConnectorsDeckers working in controlled
decking zone (CDZ)
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1926.760
Fall Protection (cont’d)
Connectors between 15 and 30 feet/2 storiesAll equipment
necessary to be capable of being used to be tied off (or safety nets) must be in place
Not required to tie off
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1926.760(b)
Fall Protection (cont’d)Deckers between 15 and
30 feet/2 storiesCan use a controlled
decking zone (CDZ) instead of fall protection
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1926.760(c)
TrainingQualified person to train
exposed workers in fall protection
Qualified person to train exposed workers engaged in special, high- risk activities
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1926.761
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Specific Controlling Contractor Duties
• Notify the steel erector in writing regarding concrete cure and anchor bolt changes
• Provide adequate layout areas and onsite access roads
• Preclude work below steel erection unless there is overhead protection
• Choose whether to accept responsibility for maintaining fall protection equipment left by erector (otherwise it must be removed)