57.00 in. Lg, contains 3 supports, first located 6.62 in. Second26.62 in. Third 46.62 in. From left end, 3 brackets, first top bracket37.00 in. Second 53.75 in. From left end, bottom bracket 10.81 in. From end1 strut assembly, two 0.158 in. Min, 0.164 in. Max diameter holes in line tapno. 10-32 nf-2 thd first hole located 19.25 in. From end second holelocated 24.563 in. From first hole 1.81 in. From top of beam