§870.TABLE E. Pier Load and Minimum Pier Capacity for 12 Foot Wide Section (Pounds)

	Roof Live Load (psf)	Mating/Perimeter Wall Opening (feet)
		5		10		15		20		25		30		35
	20	900		1800		2600		3500		4400		5300		6100
	30	1200		2300		3500		4700		5800		7000		8200
	40	1500		2900		4400		5800		7300		8800*		10200*
Soil's Load- Bearing Capacity (psf)	Footing Area (square inches)
1000	20		144		259		374		504		634		763		878
	30		173		331		504		677		835		1008		1181
	40		216		417		634		835		1051		1267		1469
1500	20		144		173		250		336		422		509		586
	30		144		221		336		451		557		672		787
	40		144		278		422		557		701		845		979
2000	20		144		144		187		252		317		382		439
	30		144		166		252		338		418		504		590
	40		144		209		317		418		526		634		734
3000	20		144		144		144		168		211		254		293
	30		144		144		168		226		278		336		394
	40		144		144		211		278		350		422		490
4000	20		144		144		144		144		191		191		220
	30		144		144		144		169		209		252		295
	40		144		144		158		209		263		317		367

 

*    Individual supports shall NOT support loads greater than 8000 pounds for a single stack of 8"x8"x16" stack of blocks, 14000 pounds for a double stack.