S e c t i o n 1 0 - P a g e 1 1 May 2013 8 x 12 Header Plate • minimum A-36 material (36,000 psi yield) • A = 8" • B = 1 2" • C = grade 2 or grade 3 • D = hole diameter as r equir ed A B A B D C C D T -Channel Plate • minimum A-36 material (36,000 psi yield) • A = 4" • B = 9" • C = grade 2 and 3 • D = hole diameter as r equir ed Bearing Plates (washers) continued www .dsiundergr ound.com