TABLE C-1.3 TIMBER TRENCH SHORING -- MINIMUM …

1 TABLE TIMBER TRENCH SHORING -- MINIMUM TIMBER requirements * SOIL TYPE C P(a) = 80 X H + 72 psf (2 ft Surcharge) _____ | | SIZE (ACTUAL) AND SPACING OF MEMBERS ** |_____ DEPTH | | CROSS BRACES OF _____ | | | | HORIZ.| WIDTH OF TRENCH (FEET) | VERT. TRENCH |SPACING|_____| SPACING | | | | | | | | | UP TO | UP TO | UP TO | UP TO | UP TO | (FEET)| (FEET)| 4 | 6 | 9 | 12 | 15 | (FEET) _____|_____|_____|_____|_____|_____|____ _|_____ | UP TO | | | | | | | 6 | 6X8 | 6X8 | 6X8 | 8X8 | 8X8 | 5 5 |_____|_____|_____|_____|_____|_____|___ __ | UP TO | | | | | | TO | 8 | 8X8 | 8X8 | 8X8 | 8X8 | 8X10 | 5 |_____|_____|_____|_____|_____|_____|___ __ | UP TO | | | | | | 10 | 10 | 8X10 | 8X10 | 8X10 | 8X10 | 10X10 | 5 |_____|_____|_____|_____|_____|_____|___ __ | See | | | | | | | Note 1| | | | | | _____|_____|_____|_____|_____|_____|____ _|_____ | UP to | 8X8 | 8X8 | 8X8 | 8X8 | 8X10 | 5 |___6___|_____|_____|_____|_____|_____|_ ____ 10 | UP TO | | | | | | | 8 | 8X10 | 8X10 | 8X10 | 8X10 | 10X10 | 5 |_____|_____|_____|_____|_____|_____|___ __ To | See

2 | | | | | | | Note 1| | | | | | |_____|_____|_____|_____|_____|_____|___ __ 15 | See | | | | | | | Note 1| | | | | | _____|_____|_____|_____|_____|_____|____ _|_____ | UP TO | | | | | | | 6 | 8X10 | 8X10 | 8X10 | 8X10 | 10X10 | 5 |_____|_____|_____|_____|_____|_____|___ __ 15 | See | | | | | | | Note 1| | | | | | |_____|_____|_____|_____|_____|_____|___ __ TO | | | | | | | | See | | | | | | | Note 1| | | | | | |_____|_____|_____|_____|_____|_____|___ __ 20 | | | | | | | | See | | | | | | | Note 1| | | | | | _____|_____|_____|_____|_____|_____|____ _|_____ OVER | SEE NOTE 1 20 | _____|_____