Type 1:

Tri-truss span (bridge): 18″ x 18″ x 18″ (triangle) x 24′ Length

Max span between posts: 24′ + 24′ = 48′

L-Post: Average Height: 17′ 11″; Column: 6″ square with 12″ square mounting plate.

Type 2:

The second is a lighter duty pipe rack system commonly painted in yellow.