3What 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.
4Purpose of SENRAC The committee's purpose is to; - resolve issues - arrive at a consensus, and- develop a proposed rule governingsteel erection.
5ParticipationAppointees 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.
6Members of the committee Army Corps of EngineersBen Hur Construction CompanyRegional AdministratorInternational 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.
7Highlights of OSHA’s New Proposed Steel Erection Standard 1926 Subpart R -Steel Erection
111926.750 Scope and Application (b) Application Hoisting Connecting WeldingBoltingRigging structural steelSteel joists and metal buildingsInstalling metal deck, siding systemsMiscellaneous metalsOrnamental ironSimilar metalsMoving point to point
13site-specific erection plan and construction sequence Site layout,site-specific erection planand construction sequence
14(a) Approval to begin steel erection (b) Site layout Site layout, site-specific erection plan and construction sequence.(a) Approval to begin steel erectionControlling employerConcrete curing(b) Site layoutAccess roadsWork area properly maintained(c) Overhead protectionPreplanned hoisting operation(d) Site-specific erection planEmployer elects to develop alternate means of protection
161926.753 Hoisting and rigging. (a) General (b) Working under loads. Pre-shift visual inspection of cranes(b) Working under loads.Preplanned routes for suspended loadsExceptionsEE’s making initial connectionRigged to prevent material displacement(c) Multiple lift rigging procedure.
18Pre planned routes for suspended loads Working under the loadPre planned routes for suspended loads
19Exception to working under loads: riggers making initial attachments securing loadPromotes crane safety by including elements of current ANSI B
20Multiple liftTwo 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.
241926.754 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.
321926.756 Beams and columns. (a) General (b) Diagonal bracing 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 bracingSecured by at least one bolt per connection
331926.756 Beams and columns. (continued) (c) Double connections at columns and/or at beam webs over a columnCommon connection holes
36Steel Erection Operation 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.
37Steel 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.
381926.757 Open web steel joists (a) General. (b) Attachment of steel joists and steel joist girders.(c) Erection of steel joists.(d) Erection bridging.