Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

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Downloaded From : www.EasyEngineering.netGuidelines for Safety Requirements for Shoring Concrete Formwork 477SECTION 3 — TUBULAR WELDED FRAME SHORINGJoistsSteel stringeShore headAdjustment screwCrossbracingFrameFrameBase plateSillww.EasyEngineering.nTubular Frame Shoring3.0 See Section 2, "General Requirements for Shoring".3.1 Metai tubular frames used for shoring shall have allowable loads based on tests conducted according to astandard test procedure for the Compression Testing of Scaffolds and Shores, as established by the Scaffolding,Shoring & Forming Institute, Inc.3.2 Design of shoring layouts using tubular welded frames shall be based on allowable loads which were obtainedusing these test procedures, and at least a 2.5 to 1 safety factor.3.3 All metal frame shoring equipment shall be inspected before erection by the contractor who erects the equipment.3.4 Metal frame shoring equipment and accessories shall not be used if excessively rusted, bent, dented, reweidedbeyond the original factory weld locations, having broken welds, or having other defects.3.5 All components shall be in good working order and in a condition similar to that of original manufacture.3.6 When checking the erected shoring frames with the shoring layout, the spacing between towers and cross bracespacing shall not exceed that shown on the layout, and all locking devices shall be in the closed position.3.7 Devices to which the external lateral stability bracing are attached shall be securely fastened to the legs of theshoring frames.3.8 Base plates, shore heads, extension devices, or adjustment screws shall be used in top and bottom of each legof every shoring tower.3.9 All base plates, shore heads, extension devices or adjustment screws shall be in firm contact with the footingsill, and/or the form material, and shall be snug against the legs of the frame.3.10 There shall be no gaps between the lower end of one frame and the upper end of the other frame.3.11 Any component which cannot be brought into proper alignment or contact with the component into or onto whichit is intended to fit, shall be removed and replaced.GUIDELINES FOR SAFETY REQUIREMENTS FOR SHORING CONCRETE FORMWORK 7Downloaded From : www.EasyEngineering.net
ww.EasyEngineering.n478 Appendix BDownloaded From : www.EasyEngineering.netSECTION 3 — TUBULAR WELDED FRAME SHORING (Continued)3.12 When two or more tiers of frames are used, they shall be cross braced. Towers shall have lateral bracing inaccordance with manufacturers' recommendations and as shown on the shoring layout.3.13 Eccentric loads on shore heads and similar members shall be avoided.3.14 Special precautions shall be taken when formwork is at angles or sloping, or when the surface shored from issloping.3.15 Adjustment screws shall not be adjusted to raise formwork during concrete placement.3.16 Work platform brackets shall not be used for carrying shoring loads. (See Section 1.6)8 SCAFFOLDING. SHORING AND FORMING INSTITUTE. INC.Downloaded From : www.EasyEngineering.net
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120 Chapter FiveExample 5-12Class I
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Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

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