Download - Keystone

DESIGN MANUAL& KEYWALL OPERATING GUIDECRANKINE METHODOLOGY LEVEL SURCHARGE - 250 PSF13) Connection StrengthThe last major item to check is the geogrid connection strength. KeyWall incorporates the laboratoryconnection test data for all Keystone unit types connected to different geogrid types. The followingchart is applicable for Standard units and Stratagrid SG200 geogrid in this example:3000Connection CapacityConnection Force (plf)250020001500100050000 500 1000 1500 2000 2500 3000 3500 4000Normal Force (plf)The equations for these connection curves are:Peak Connection = 834 plf + N Tan 35.80˚ < 1567 plf Max / 1.5 Factor of Safety¾" Serviceability = 795 plf + N Tan 4.10˚ < 1062 plf MaxHeight Grid Depth N Tpeak TServ Load4) 8.00' SG200 2.00' 420 758 825 4253) 5.33' SG200 4.67' 981 1027 865 6112) 2.67' SG200 7.33' 1539 1045 905 7321) 0.67' SG200 9.33' 1959 1045 935 637OK - Calculated loads are less than the maximum allowable for Peak connection criteria.(Rankine method does not check serviceability as the default setting)C.9