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 481SECTION 5 — SYSTEM SCAFFOLD SHORINGShoreheadAdjustingscrewPostDiagonalbraceRunnerAdjustingscrewBase platesSillsww.EasyEngineering.nSystems Shoring5.0 See Section 2, "General Requirements for Shoring".5.1 System scaffold towers used for shoring shall have allowable loads based on tests conducted according to astandard test procedure for the Compression Testing of Scaffolds and Shores, such as the one established bythe Scaffolding, Shoring & Forming Institute, Inc., or its equivalent.5.2 Design of system scaffold towers in the shoring layouts shall be based on allowable loads which were obtainedusing these test procedures, and at least a 2.5 to 1 safety factor.5.3 All system components shall be inspected by the contractor who erects the equipment before being used.5.4 Components of shoring structures shall not be used if excessively rusted, bent, dented, or having other defects.5.5 All components shall be in good working order and in a condition similar to that of original manufacture. Couplers(clamps) shall not be used if deformed, broken, having defective or missing threads on bolts, or other defects.5.6 When checking the erected shoring towers with the shoring layout, the spacing between the posts.shall notexceed that shown on the layout, and all locking devices shall be in the closed position.5.7 Devices to which the external lateral stability bracings are attached shall be securely fastened to the posts.5.8 Devices to which the external lateral stability bracing are attached shall be firmly attached to the post.5.9 Base plates, shore heads, extension devices, or adjustment screws shall be used in top and bottom of each post.5.10 All base plates, shore heads, extension devices, or adjustment screws shall be in firm contact with the footingsilt and/or the form material, and shall be snug against the posts.5.11 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 11Downloaded From : www.EasyEngineering.net
ww.EasyEngineering.n482 Appendix BDownloaded From : www.EasyEngineering.netSECTION 5 — SYSTEM SCAFFOLD SHORING (Continued)5.12 Eccentric loads on shore heads and similar members shall be avoided.5.13 Special precautions shall be taken when formwork is at angles or sloping, or when the surface shored from issloping.5.14 Adjustment screws shall not be used to raise formwork during concrete placement.[2 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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