construction safety council. by david g. allie subpart r - steel erection (1926.750 - 753) tiered...
TRANSCRIPT
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Construction Safety Council
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Construction Safety Council
by
David G. Allie
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Subpart R - Steel Erection(1926.750 - 753)
24
18
13
750(b)(1)(ii)
751(d)
750(b)(2)(i)
Sta
nd
ard
- 1
92
6.
Tiered buildings not adaptable to temporary floors - Safety nets
Tag lines to control loads
Skeleton steel erection - Tightly planked & substantial floor
Construction Safety Council
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1926.760 - Fall protection
Construction Safety Council
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(a)General requirements
(1)Anyone over 15 feet, except in (a)(3)
(2)Fall protective systems shall conform to 1926.502.
(3)Connectors and employees working in controlling decking zones protected from fall hazards as provided in (b) and (c) of this section.
Construction Safety Council
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(b)Connectors
(1)Protected when more than two stories or 30 feetabove a lower level;(2)Complete connectortraining in accordancewith 1926.761; and(3)Provided with fall
arrestor fall restraint systemswhen 15’ to 30’ above alower level.
Construction Safety Council
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(1)Columns anchored by a min. of 4 bolts and designed to resist a 300# eccentric load at 18” from the column face.(2)Columns set on level finished floors, pre-grouted leveling plates, leveling nuts, or shim packs.(3)Unstable columns shall be evaluated by a competent person.
(a)General requirements for erection stability
1926.755 - Anchor bolts
Construction Safety Council
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(1)Need approval of the project structural engineer.
(2)Approval shall state whether guying or bracing is necessary.
(3)Controlling contractor shall provide written notification to the steel erector.
(b)Repair, replacement or field modification
Construction Safety Council
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Plumbing-up
Equipment:
turnbuckles
•properly secured
•secured to prevent unwinding
•placed so employees can get to connection points
•removed only under the supervision of a competent person
Construction Safety Council
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1926.752 1926.752 Site layout, site-specific Site layout, site-specific erection plan and erection plan and construction sequenceconstruction sequence
Construction Safety Council
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(a) Approval to begin steel erection
• ASTM standard test method (concrete must be 75% of the minimum compressive design strength): footings, piers, walls
• Repairs, replacements and modifications to anchor bolts made in accordance with 1926.755(b)
Construction Safety Council
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(b) Site layout (controlling contractor shall provide):
• Adequate access
• A firm, properly graded, drained area, readily accessible for the safe storage of materials and the safe operation of equipment
Construction Safety Council
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(c) Overhead protection(c) Overhead protection
• Pre-planned to ensure that no employee is required to be exposed to overhead hazards in accordance with 1926.753 (b) and 1926.759
Construction Safety Council
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(d) Site-specific erection plan(d) Site-specific erection plan
• Developed by a qualified person
• Available at the work site
• Use guidelines contained in Appendix A
Construction Safety Council
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1926.756 - Beams and
columns
Construction Safety Council
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(a)General. Secured with at least two bolts per connection.
(b)Diagonal bracing. With bracing, secured by at least one bolt per connection.
(c)Double connections at columns and/or at beam webs over a column. At least one bolt or similar connection device is present.
Construction Safety Council
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(d)Column splices. Designed to resist a 300# eccentric load located at 18” from column face.
(e)Perimeter columns. Must extend a min. of 48” above the finished floor for safety cables.
Construction Safety Council
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(c) Multiple lift rigging procedure
Construction Safety Council
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(1) Multiple lift shall only be performed if the following are met:
– multiple lift rigging assembly is used;
– maximum of five members is hoisted per lift;
– only structural members are lifted; and
– employees engaged in the lift have been trained in the procedures in 1926.761 (c)(1)
Construction Safety Council
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(4)The multiple lift rigging assembly shall be rigged with the members: rigged at
least 7 feet apartrigged from the top down
attached at their center of gravity and maintained level
Construction Safety Council
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(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.
Capacity must be certified by the manufacturer or a qualified rigger
and have a 5 to 1 safety factor
Construction Safety Council
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(3) The total load shall not exceed:• The rated capacity of the hoisting
equipment• The rigging capacity
(4) The multiple lift rigging assembly shall be rigged with the members:
– attached at their center of gravity and maintained level;
– rigged from the top down; and– rigged at least 7 feet apart
Construction Safety Council
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(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 is over the connectors.
Construction Safety Council
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Construction Safety Council
Structural Steel Assembly
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Shear Connectors
and Other Similar Devices
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1926.753 - Hoisting and rigging(Supplement to the requirements of 1926.550)
Construction Safety Council
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(a) General
(1) Pre-shift visual inspection of cranes:– all control mechanisms
for maladjustments
– excessive wear of components and
contamination by lubricants
or other foreign matter
– safety devices
– pressurized lines for leakage
– hooks and latches
– wire rope
– electrical apparatus
– hydraulic system
– tires
– ground conditions
– hoisting equipmentConstruction Safety Council
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(a)(1)(iv)
The employer shall obtain and/or prepare a certification record of the pre-shift inspection
(a)(1)(v)
The operator shall be responsible for those operations under the operator’s direct control
Construction Safety Council
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(a) General
(2)Qualified rigger to inspect the rigging prior to each shift
(3) Headache ball not used to transport personnel
(4) Only use of personnel platforms in accordance with 1926.550 (g)
Construction Safety Council
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(5)Safety latches on hooks shall not be deactivated except:
• when hoisting can be performed more safely; or
• qualified rigger provides equivalent protection and is included in a site-specific erection plan
Construction Safety Council
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1926.760 - Fall protection(e)Custody of fall protection. Fall protectionshall remain in an area to be used by othertrades if controlling contractor:
(1)Has directed the steel erector to leave the fall protection in place.
(2)Has inspected and accepted control and responsibility of the fall protection prior to authorizing persons to work in the area.
Construction Safety Council
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(b) Working under loads
(1)Routes for suspended loads shall be pre-planned
(2)When working under suspended loads, the following must be meet:
• materials rigged to prevent unintentional displacement;
• self-closing safety latches shall be used;
• all loads rigged by qualified riggers.
Construction Safety Council
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1926.761 - Training
(a)Training personnel. Provided by a qualified person(s).
(b)Fall hazard training. Include instruction in the following areas:
(1) Recognition and identification
(2) Use and operation of systems.
(3) Correct procedures for erecting, maintaining, disassembling, and inspection of protective systems.
(4) Procedures to be followed to prevent falls.
(5) Fall protection requirements of 1926.760.
Construction Safety Council
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(c) Special training programs
(1) Multiple lift rigging procedure
(2) Connector procedures
(3) Controlled decking zone procedures
Construction Safety Council