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

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Guidelines for Safety Requirements for Shoring Concrete Formwork 479
SECTION 4 — TUBE AND COUPLER SHORING
Shore
head
Adjusting
screw
Diagonal
brace
Post
Runner
Right-angle
clamp
Swivel
clamp
Base
plate
Sill
Tube & Coupler Shoring
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4.0 See Section 2, "General Requirements lor Shoring".
4.1 Tube and coupler systems towers used for shoring shall have allowable loads based on tests conducted
according to a standard test procedure for the Compression Testing of Scaffolds and Shores, such as the one
established 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 were
obtained 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 before
being 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 exceed
that 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 footing
sill 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 which
it is intended to fit, shall be removed and replaced.
GUIDELINES FOR SAFETY REQUIREMENTS FOR SHORING CONCRETE FORMWORK 9
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