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 479SECTION 4 — TUBE AND COUPLER SHORINGShoreheadAdjustingscrewDiagonalbracePostRunnerRight-angleclampSwivelclampBaseplateSillTube & Coupler Shoringww.EasyEngineering.n4.0 See Section 2, "General Requirements lor Shoring".4.1 Tube and coupler systems towers used for shoring shall have allowable loads based on tests conductedaccording to a standard test procedure for the Compression Testing of Scaffolds and Shores, such as the oneestablished by the Scaffolding, Shoring & Forming Institute, Inc., or its equivalent.4.2 Design of tube and coupler systems towers in the shoring layouts shall be based on allowable loads which wereobtained using these test procedures, and at least a 2.5 to i safety factor.4.3 All tube and coupler systems components shall be inspected by the contractor who erects the equipment beforebeing used.4.4 Components structures shall not be used if excessively rusted, bent, dented, or having other defects.4.5 All components shall be in good working order and in a condition similarto thatof original manufacture. Couplers(clamps) shall not be used if deformed, broken, having defective or missing threads on bolts, or other defects.4.6 The material used for the couplers (clamps) shall be of a structural type such as drop-forged steel, malleable iron,or structural grade aluminum. Gray cast iron shall not be used.4.7 When checking the erected shoring towers with the shoring layout, the spacing between posts shall not exceedthat shown on the layout, and all locking devices shall be in their closed position.4.8 Base plates, shore heads, extension devices, or adjustment screws shall be used in top and bottom of each post.4.9 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 posts.4.10 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 9Downloaded From : www.EasyEngineering.net
ww.EasyEngineering.n480 Appendix BDownloaded From : www.EasyEngineering.netSECTION 4 — TUBE AND COUPLER SHORING (Continued)4.11 Eccentric loads on shore heads and similar members shall be avoided.4.12 Special precautions shall be taken when formwork is at angles or sloping, or when the surface shored from issloping.4.13 Adjustment screws shall not be used to raise formwork during concrete placement.10 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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