Transcript Subpart R - University of Southern Mississippi

Construction Safety Council
Construction Safety Council
by
David G. Allie
Subpart R - Steel Erection
(1926.750 - 753)
Tiered buildings not adaptable to temporary floors Safety nets
750(b)(1)(ii)
24
Standard - 1926.
Tag lines to control loads
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751(d)
18
Skeleton steel erection - Tightly planked & substantial floor
750(b)(2)(i)
13
1926.760 - Fall protection
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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.
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(b)Connectors
(1)Protected when more
than two stories or 30 feet
above a lower level;
(2)Complete connector
training in accordance
with 1926.761; and
(3)Provided with fall arrest
or fall restraint systems
when 15’ to 30’ above a
lower level.
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1926.755 - Anchor
bolts
(a)General requirements
for erection stability
(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.
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(b)Repair, replacement or field modification
(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.
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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
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1926.752
Site layout, site-specific
erection plan and
construction sequence
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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)
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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
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(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
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(d) Site-specific erection plan
• Developed by a qualified person
• Available at the work site
• Use guidelines contained in Appendix A
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1926.756 Beams and
columns
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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.
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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.
(c) Multiple lift rigging procedure
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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)
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(4)The multiple lift rigging assembly
shall be rigged with the members:
rigged from the top down
attached at their center of
gravity and maintained level
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rigged at
least 7 feet
apart
(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
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(3)
(4)
The total load shall not exceed:
• The rated capacity of the hoisting
equipment
• The rigging capacity
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
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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.
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Structural Steel Assembly
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Shear Connectors
and Other Similar Devices
1926.753 - Hoisting and
rigging
(Supplement to the
requirements of 1926.550)
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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
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– pressurized lines for
leakage
– hooks and latches
– wire rope
– electrical apparatus
– hydraulic system
– tires
– ground conditions
– hoisting equipment
(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
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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)
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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 sitespecific erection
plan
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1926.760 - Fall protection
(e)Custody of fall protection. Fall protection
shall remain in an area to be used by other
trades 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.
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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.
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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.
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(c) Special training programs
(1)
(2)
(3)
Multiple lift rigging procedure
Connector procedures
Controlled decking zone procedures
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