1926 Subpart R Part IHistory of SENRAC Part IIHighlights of proposed standard Part IIIIf time...

1926 Subpart R• Part I History of SENRAC

• Part II Highlights of proposed standard

• Part III If time permits overview of Directive

OSHA’sSSteel

EErectionNNegotiated

RRulemakingAAdvisory

CCommittee

What is SENRAC?The Steel Erection Negotiated Rulemaking Advisory Committee (SENRAC) consists of representatives of employers and employees that will be significantly affected by the proposed rule covering steel erection in construction.

The Committee began negotiations in June of 1994.

Purpose of SENRACPurpose of SENRAC

The committee's purpose is to;- resolve issues

- arrive at a consensus, and - develop a proposed rule

governing steel erection.

ParticipationParticipationAppointees to the Committee include representatives from labor, industry, public interests and government agencies.

Many interested parties have attended the public meetings and have participated in the workgroups established by SENRAC.

Members of the committeeMembers of the committee• Army Corps of Engineers• Ben Hur Construction Company• Regional Administrator• International Association of Bridge,

Structural & Ornamental Iron Workers;

• International Association of Bridge, Structural & Ornamental Iron workers;

• El Paso Crane & Rigging, Inc.;• International Brotherhood of

Boilermakers, Iron Ship Builders, Blacksmiths, Forgers & Helpers;

• Network, Inc.;• Building and Construction Trades

Department (AFL-CIO)• Black & Veatch;

• United Steelworkers of America;

• Gilbane Building Company;

• Williams Enterprises of Georgia, Inc.;

• Holton & Associates, Ltd.;

• CAL/OSHA;

• International Association of Bridge, Structural & Ornamental Iron Workers;

• International Union of Operating Engineers;

• National Institute for Occupational Safety and Health (NIOSH)

• C. Rockwell Turner-L.P.R. Construction Co.;

• National Erectors Association.

Highlights of OSHA’s New Highlights of OSHA’s New ProposedProposed Steel Erection Standard Steel Erection Standard

1926 Subpart R - 1926 Subpart R - Steel ErectionSteel Erection

1926.750 1926.750 Scope and ApplicationScope and Application

• (a) Scope– Hazards associated with steel erection

activities:• Single & multi-story buildings• Bridges• Other structures where steel erection occurs

1926.750 Scope and Application

• (b) Application– Hoisting

– Connecting

– Welding

– Connecting

– Bolting

– Rigging structural steel

– Steel joists and metal buildings

– Installing metal deck, siding systems

– Miscellaneous metals

– Ornamental iron

– Similar metals

– Moving point to point

1926.750 Scope and Application

1926.751 1926.751 DefinitionsDefinitions

Controlling EmployerControlling Employer

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

• (a) Approval to begin steel erection• Controlling employer• Concrete curing

• (b) Site layout• Access roads• Work area properly maintained

• (c) Overhead protection• Preplanned hoisting operation

• (d) Site-specific erection plan• Employer elects to develop alternate means of protection

1926.752 Site layout, site-specific erection plan

and construction sequence.

1926.753 Hoisting 1926.753 Hoisting and Riggingand Rigging

1926.753 Hoisting and rigging.

• (a) General• Pre-shift visual inspection of cranes

• (b) Working under loads.

• Preplanned routes for suspended loads– Exceptions

• EE’s making initial connection

• Rigged to prevent material displacement

• (c) Multiple lift rigging procedure.

Pre Shift VisualPre Shift VisualInspectionsInspections

Working under the loadWorking under the load

Pre planned routes for suspended loads

Promotes crane safety by including elements of current ANSI

B30.5 - 1994.

Exception to working under loads: riggers making initial attachmentssecuring load

Two connectors were erecting lightweight steel "I" beams on the third floor of a 12-story building, 54 feet above the ground. One employee removed a choker sling from a beam and then attempted to place the sling onto a lower empty hook on a series of stringers. While the crawler tower crane was booming away from the steel, the wind moved the load line and stringer into the beam the employee was standing on. The beam moved while the employee was trying to disengage the hook, and fell to his death.

Multiple lift

"Multiple lift rigging."

Rigging

1926.754 Structuralsteel assembly

1926.754 Structural steel assembly.

• (a) Structural stability shall be maintained at all times during the erection process– (1) The permanent floors shall be installed as the erection of structural

members progresses, and there shall be not more than eight stories between the erection floor and the upper-most permanent floor, except where the structural integrity is maintained as a result of the design.

– (2) At no time shall there be more than four floors or 48 feet (14.6 m), whichever is less, of unfinished bolting or welding above the foundation or uppermost permanently secured floor, except where the structural integrity is maintained as a result of the design.

– (3) A fully planked or decked floor or nets shall be maintained within 2 stories or 30 feet (9.1 m), whichever is less, directly under any erection work being performed.

• (c)

Walking/working surfaces.– Tripping hazards– Skeletal

structural steel• Coated steel

1926.754 Structural steel assembly.

(d) Plumbing-up• Connections used properly secured• Removed only with approval of competent person

1926.754 Structural steel assembly(continued)

• (e) Decking.• Hoisting, landing &

placing of deck bundles

– Strapping

– Roof and floor openings.

– Space around columns.

– Floor decking.

– Derrick floors.

Hoisting, landing & placing of deck bundles

1926.755 1926.755 Anchor boltsAnchor bolts

1926.755 Anchor bolts.

• (a) General requirements for erection stability.

• (b) Repair, replacement or field modification.

1926.756 1926.756 Beams and columnsBeams and columns

1926.756 Beams and columns.

• (a) General• Load shall not be released until final members

secured by at least two bolts per connection, drawn wrench tight per project structural engineer of record

• (b) Diagonal bracing• Secured by at least one bolt per connection

• (c) Double connections at columns and/or at beam webs over a column

• Common connection holes

1926.756 Beams and columns. (continued)

1926.756 Beams and columns. (continued)

(e) Perimeter columns.(f) Perimeter safety cables.

1926.757 1926.757 Open web steel joistsOpen web steel joists

An employee was assigned to connect the X-braces at the end of 40-foot long bar joists. Only one end of the bar joist he was working on had been welded. The employee was sitting on the unwelded end of the bar joist trying to connect the X-braces. He lost his balance, dislodging the bar joist from its end support, and fell approximately 24 feet to his death.

Steel Erection Operation

Five iron workers were distributing 90-foot-long open web bar joists on a building under construction. The bar joists were supported by vertical columns spaced 30 feet apart. The steel columns were not framed in at least two directions and the bar joists were not field bolted to the vertical columns to prevent collapse. The bar joists shifted, causing the vertical columns to lean. This caused entire section of columns and pen web bar joists to collapse. Two employees rode the iron down. One was fatally injured and one received serious injuries.

Steel Erection Operation

1926.757 Open web steel joists

• (a) General.

• (b) Attachment of steel joists and steel joist girders.

• (c) Erection of steel joists.

• (d) Erection bridging.

Open web steel joists

Open web steel joists

1926.7581926.758Pre-engineered Pre-engineered metal buildingsmetal buildings

• Erection shall not begin until site has been completed

• Anchored by minimum of 4 anchor bolts

• Rigid framed - 50 percent bolts installed

1926.758Pre-engineered metal buildings

1926.759 1926.759 Falling object protection.Falling object protection.

1926.759 Falling object protection

• (a) Securing loose items aloft.

• (b) Overhead protection.

Falling objects

1926.760 1926.760 Fall protectionFall protection

No can do??

1926.760 Fall protection

• (a) General requirements.

• (b) Connectors.

• (c) Controlled decking zone (CDZ).

• (d) Covering roof and floor openings.

• (e) Custody of fall protection.

Fall protection

Connectors

Fall protection

Fall protection

Controlled Decking Zone (CDZ)

None

1926.761 1926.761 TrainingTraining

1926.761 Training

• (a) Training personnel.

• (b) Fall hazard training.

• (c) Special training programs.