Steel Erection JSA

Steel erection has its own OSHA subpart — 1926 Subpart R — because the work does not fit the rest of construction: the structure is incomplete while people work on it, the loads are enormous, and the fall protection trigger is 15 feet rather than 6, with narrower rules for connectors and deckers.

Subpart R also puts two requirements before the first piece is lifted: written notification that the concrete supporting the steel has cured enough, and minimum anchorage on every column. Both belong in the JSA as pre-conditions, not as controls.

What the work involves

• Pre-erection checks — concrete cure notification, site layout, access
• Hoisting and rigging structural members
• Connecting beams and columns at height
• Installing metal decking and covering openings
• Bolting up, plumbing and final connections

Hazards and controls

Controls are listed in hierarchy order — the further down the list a control sits, the less it should be carrying on its own.

1. Fall from the steel during connecting or decking

• Engineering: perimeter safety cables at the final interior and exterior floor edges as soon as the decking is installed.
• Engineering: personal fall arrest or fall restraint for work more than 15 feet above a lower level, with anchorages planned into the erection sequence.
• Administrative: connectors and employees in controlled decking zones work under the specific provisions Subpart R sets for them — a named competent person controls the zone.

29 CFR 1926.760(a)(1) requires fall protection for each employee engaged in steel erection who is on a walking/working surface more than 15 feet above a lower level. 29 CFR 1926.760(b) sets the specific fall protection provisions for connectors, including requirements above 15 feet and between 15 and 30 feet.

2. Structural collapse — inadequate footing cure or column anchorage

• Administrative: do not start erection without the written notification that footing and pier concrete has reached the required strength.
• Engineering: every column anchored with at least four anchor rods, designed to resist the erection loads including a 300-pound eccentric load.
• Administrative: no modification of anchorage or removal of bracing without the approval of a qualified person.

29 CFR 1926.752(a)(1) prohibits steel erection until the controlling contractor provides written notification that the concrete in footings, piers and walls has attained either 75 percent of its intended minimum compressive design strength or sufficient strength to support the loads. 29 CFR 1926.755(a)(1) requires columns to be anchored by a minimum of four anchor rods.

3. Struck by a suspended or swinging load

• Eliminate: pre-plan load routes so loads never travel over people, and keep the landing zone clear.
• Engineering: tag lines to control rotation; qualified rigging inspected before each shift.
• Administrative: nobody beneath a suspended load; one designated signal person; the crane operator stops on any stop signal from anyone.

29 CFR 1926.753(d) sets the requirements for working under loads, including that routes for suspended loads be pre-planned and that employees not be permitted under a suspended load except those engaged in hooking or unhooking.

4. Objects falling onto lower levels through openings

• Engineering: cover or guard floor openings and deck holes as the decking goes in; secure loose decking against wind.
• Administrative: secure all materials, tools and loose items aloft against displacement; barricade the area below.
• PPE: hard hats, tool tethers.

29 CFR 1926.759(a) requires all materials, equipment and tools not in use aloft to be secured against accidental displacement.

5. Crew unfamiliar with the Subpart R procedures they are relying on

• Administrative: training by a qualified person covering fall protection, the controlled decking zone, connector procedures and multiple lift rigging before exposure.
• Administrative: the erection sequence and the day's plan briefed to the whole crew, not just the foreman.

29 CFR 1926.761 requires training by a qualified person in the recognition and avoidance of steel erection hazards, including fall protection, and special training for multiple lift rigging, connector and controlled decking zone work.

A worked example row

This is how one line of the finished JSA reads, with the risk bands scored on the same 4-band matrix the generator prints:

Related work activities

• Working at Heights JSA
• Crane & Hoisting JSA
• Scaffold JSA