Grain Bin Overpressure Coefficient
Grain Bin Overpressure Coefficient
(OP)
I'm designing a 70' tall, 8'x8'square grain bin to hold corn and soybean meal. I'm having a difficult time determining the overpressure coefficient to use on the bin walls using Janssen formula. There's some discrepancy between ACI (1991) which tells me to multiply the horizontal pressure by a factor of 3 for H/D>6 and ASAE EP 433 which tell me to multiply it by 1.4 for H/D >2. Which is the standard design factor? Thanks in advance for your help.





RE: Grain Bin Overpressure Coefficient
RE: Grain Bin Overpressure Coefficient
RE: Grain Bin Overpressure Coefficient
RE: Grain Bin Overpressure Coefficient
Soybean meal is one of the most difficult materials to for design, construction and operation trouble free bins. We tend to design square and rectangular bins with corner draw hoppers to help minimize bridging problems... We also design hoppers with air blast pads to jar materials loose if needed, but then you have to be careful not to aerate the materials. We do use some vibrators with some materials.
For really basic design information, the Midwest Plan service has some simplified publications. Then go to ACI 313 for more specific design information.
There are tons of books and publications on bin and hopper design but practical experience under an old master designer really helps the most,,,, LOL
r.
RE: Grain Bin Overpressure Coefficient
r
RE: Grain Bin Overpressure Coefficient
Colin S
www.hydroponicshop.eu