For abutments supporting Tx70 girders, use a cap width of at least 4.00 ft. as well as 42 in. diameter drilled shafts as a minimum.

For abutments supporting Type IV beams or U-beams, use a cap width of at least 3.25 ft. as well as 36 in. diameter drilled shafts as a minimum. For all other structure types refer to the bridge standard drawings for recommended cap widths.