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A Study in Wall Pressures in a Flat Clear-Span Cottonseed Storage House

M. Herbert Willcutt, S.D. Filip To


No Article Results from these studies indicate that cottonseed exert a pressure on the building as a function of the total depth of the seed. A relationship for wall pressure was established as a function of vertical pressure for the chambers evaluated. The maximum wall pressure in a cottonseed storage building was found to occur at approximately 15 to 20 percent of the total seed depth above the floor. The maximum horizontal pressure observed for the 19 ft eve-height storage building with a 4/12 roof slope and with seed to the 28-30 ft level in the center of the building was 285 lb/ft2 and occurred at 4.5 ft in 1994. The maximum horizontal pressure observed in 1995 was 166 lbs/ft2 for a 16 ft depth of seed in a partially filled house (blown against one wall until seed reached the center of the floor), without aeration. The maximum forces occurred about 3-4 ft above the floor level. The first filling of the house was aerated which resulted in about a 25 percent increase in horizontal forces when aeration was being performed. Some increase in wall pressures were observed as the seed pile's lateral depth increased after reaching the final filling depth. This supports the simulation chamber results that house width and length do have an effect on wall loadings.

Reprinted from Proceedings of the 1996 Beltwide Cotton Conferences pp. 1625 - 1630
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998