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.
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