Construction Safety Council. by David G. Allie Subpart R - Steel Erection (1926.750 - 753) Tiered buildings not adaptable to temporary floors - Safety

Construction Safety Council


by

David G. Allie

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


1926.760 - Fall protection


(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.


(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.


(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


(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


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


1926.752 1926.752 Site layout, site-specific Site layout, site-specific erection plan and erection plan and construction sequenceconstruction sequence


(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)


(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


(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


(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


1926.756 - Beams and

columns


(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.


(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


(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)


(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


(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


(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


(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.



Structural Steel Assembly

Shear Connectors

and Other Similar Devices

1926.753 - Hoisting and rigging(Supplement to the requirements of 1926.550)


(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

(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


(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)


(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


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.


(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.


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.


(c) Special training programs

(1) Multiple lift rigging procedure

(2) Connector procedures

(3) Controlled decking zone procedures


Documents

Construction Safety Council. by David G. Allie Subpart R - Steel Erection (1926.750 - 753) Tiered buildings not adaptable to temporary floors - Safety