Transcription of TIMBER TRENCH SHORING -- MINIMUM TIMBER …
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TIMBER TRENCH SHORING -- MINIMUM TIMBER …
Table TIMBER TRENCH SHORING -- MINIMUM TIMBER requirements * soil TYPE B P(a) = 45 X H + 72 psf (2 ft Surcharge) SIZE ( actual ) and spacing of members ** Depth of TRENCH Wales Uprights (Feet) Size Vertical MAXIMUM ALLOWABLE HORIZONTAL spacing (feet) (in) spacing (ft.) Close 2 3 5 6 x 8 5 2 x 6 to 8 x 10 5 2 x 6 10 10 x 10 5 2 x 6 8 x 8 5 2 x 6 10 10 x 10 5 2 x 6 to 10 x 12 5 2 x 6 15 8 x 10 5 3 x 6 15 10 x 12 5 3 x 6 to 12 x 12 5 3 x 6 20 over 20 SEE NOTE 1 * Mixed oak or equivalent with a bending strength not less than 850 psi.
table c-1.2 . timber trench shoring -- minimum timber requirements * soil type b p(a) = 45 x h + 72 psf (2 ft surcharge) size (actual) and spacing of members **
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