West Virginia Code of State Rules › Agency 36 - Coal Mine Health And Safety › Title 36 - LEGISLATIVE EXEMPT RULE BOARD OF COAL MINE HEALTH AND SAFETY › Series 36-23 - Rules And Regulations Governing Surface Construction Operations Within The Coal Mining Industry Within The State Of WV › Section 36-23-37 - Concrete, Concrete forms, and Shoring

Current through Register Vol. XLI, No. 28, July 12, 2024
37.1. General provisions.
(a) General. -- All equipment and materials
				used in concrete construction and masonry work shall meet the applicable
				re­quirements for design, construction, inspec­tion, testing,
				maintenance and operations, as prescribed in ANSI A10.9-1970, safety
				re­quirements for concrete construction and masonry work.
(b) Reinforcing steel.
(1) Employees working more than six (6) feet
				above any adjacent working surfaces, placing and tying reinforcing steel in
				walls, piers, columns, etc., shall be provided with a safetybelt, or equivalent
				device.
(2) Employees shall not be
				per­mitted to work above vertically protruding reinforcing steel unless
				it has been protected to eliminate the hazard of impalement.
(3) Guying: Reinforcing steel for walls,
				piers, columns, and similar vertical structures shall be guyed and supported to
				prevent collapse.
(4) Wiremesh
				rolls: Wire mesh rolls shall be secured at each end to prevent dangerous
				recoiling action.
(c)
				Bulk concrete handling. Bulk storage bins, containers, or silos shall have
				conical or tapered bottoms with mechanical or pneumatic means of starting the
				flow of mate­rial.
(d)
				Concrete placement.
(1) Concrete mixers.
				Concrete mixers equipped with one (1) yard or larger loading skips shall be
				equipped with a me­chanical device to clear the skip of
				material.
(2) Guardrails. Mixers of
				one (1) year capacity or greater shall be equipped with protective guardrails
				installed on each side of the skip.
(3) Bull floats. Handles on bull floats, used
				where they may contact energized electrical conductors, shall be constructed of
				nonconductive material, or insulated with nonconductive sheath whose electrical
				and mechancial characteristics provide the equiva­lent protection of a
				handle constructed of nonconductive material.
(4) Powered concrete trowels. Powered and
				rotating-type concrete troweling machines that are manually guided shall be
				equipped with a control switch that will auto­matically shut off the
				power whenever the operator removes his hands from the equip­ment
				handles.
(5) Concrete buggies.
				Handles of buggies shall not extend beyond the wheels on either side of the
				buggy. Installation of knuckle guards on buggy handles is
				recom­mended.
(6) Pumpcrete
				systems. Pump­crete or similar systems using discharge pipes shall be
				provided with pipe supports designed for one hundred (100) percent overload.
				compressed air hose in such systems shall be provided with positive fail safe
				joint connec­tors to prevent separation of sections when
				pressurized.
(7) Concrete buckets.
(i) Concrete buckets equipped with hydraulic
				or pneumatically operated gates shall have positive safety latches or similar
				safety devices installed to prevent aggregate and loose material from
				accumulat­ing on the top and sides of the bucket.
(ii) Riding of concrete buckets for any
				purpose shall be prohibited, and vibrator crews and all other persons shall be
				kept out from under concrete buckets suspended from cranes or
				cableways.
(8) When
				discharging on a slope, the wheels of a ready-mix trucks shall be blocked and
				the brakes set to prevent move­ment.
(9) Nozzlement applying a ce­ment,
				sand, and water mixture through a pneumatic hose shall be required to wear
				protective head and face equipment.
(e) Vertical shoring.
(1) General requirements.
(i) When temporary storage of reinforcing
				roads, material, or equipment on top of formwork becomes necessary, these areas
				shall be strengthened to meet the intend­ed loads.
(ii) the sills or shoring shall be sound,
				rigid, and capable of carrying the maximum intended load.
(iii) All shoring equipment shall be
				inspected prior to erection to deter­mine that it is as specified in the
				shoring layout. Any equipment found to be damaged shall not be used for
				shoring.
(iv) Erected shoring
				equip­ment shall be inspected immediately prior to, during, and
				immediately after the placement of concrete. Any shoring equipment that is
				found to be damaged or weakened shall be immediately reinforced or
				reshored.
(v) Reshoring shall be
				pro­vided when necessary to safely support slabs and beams after
				stripping, or where such members are subjected to super-imposed loads due to
				construction work done.
(2) Tubular welded frame shor­ing.
(i) Metal tubular frames used for shoring
				shall not be loaded beyond the safe working load recommended by the
				manu­facturer.
(ii) All
				locking devices on frames and braces shall be in good working order; coupling
				pins shall align the frame or panel legs; pivoted cross bracers shall have
				their center pivot in place; and all components shall be in a condition similar
				to that of origi­nal manufacturer.
(iii) When checking the erected shoring
				frames with the shoring layout, the spacing between towers and cross brace
				spacing shall not exceed that shown on the layout, and all locking devices
				shall be in the closed position.
(iv) Devices for attaching the external
				lateral stability bracing shall be securely fastened to the legs of the shoring
				frames.
(v) All baseplates, shore
				heads, extension devices, or adjustment screws shall be in firm contact with
				the footing sill and the form.