The cables were attached to carriages, which ran on I-beams on the top of the trestles.
In others it is constructed of iron or steel I-beams and channels.
The cross-bridging and needle-beams of 5-inch I-beams are unusually substantial.
The center sills are 5-inch I-beams, faced on both sides with Southern pine.
The girders upon which it runs consist of 12-inch I-beams, which are hung from the roof trusses.
I-beams was then put in position over each line and supported on the sides by posts.
A more complex centering is required where the slab has to be haunched around the I-beams.
For this purpose eight I-beams were embedded in concrete around the top to be used as posts for the sides of the bin.
The skew angle is 9°, the total length of each bridge being about 450 ft. The floors consist of I-beams embedded in concrete.
I-beams, which were hung from stringers resting on the upper caps.