How do others address designing foundations/slabs in unheated PEMB. Here is my problem - 4' frost, PEMB, unheated, large horizontal thrust reaction.
My concerns:
1. Slab moves due to frost heave - do you pour foundation wall with curb and attach panel to curb, let slab float - do you try to...
Designing a job on drilled concrete piers in Texas (expansive soils). What is the typical diameter (or most cost effective) and maximum bell diameter.
Looking a 12" diameter aprox. 10'-15' deep -- what can I use for a maximum bell diameter?
Jeff
I am designing a 30' tall 17'x17' square tower to support a loadout bin (245k DL+LL). Problem is that my model keeps diverging under DL+LL and load cases with wind perpendicular to drive through dimension. The structure is braced on all sides with x-bracing except where it is open for the...
I have horizontal floor bracing (grating floor-no diaphragm) to transfer seismic loads to my exterior wall vertical bracing. The angle shown is resisting 53 kips seismic. I have sketched two possible bracing senarios:
W.P. at column flange - much easier detail, however creates a...
I am working on a 160'+ tower and calculating wind loads. Question is what is the contributary area for floor grating blowing perpendicular to the bearing bars. If I figure the area of each bar, like I do with the depth/web of a beam, my reactions become very large.
Will the wind blow against...
When does an agricultural building/structure need to be reviewed and signed off by a licensed engineer. I am reviewing a grossly underdesigned farmers grain recieving and storage facility which is clearly structurally unsafe. 140'+ distribution tower on next to nothing footings.
These once...
We mainly design/construct industrial/grain/seed facilities and this question keeps coming up: What are the strair/handrail/guardrail requirements for equipment access?
Do equipment access stairs need to be 36" wide with 7" rise and 11" run?
Do equipment access stairs need the 42" guardrail...
I am checking an existing (25-year old) seed corn tower supporting (4) surge bins. The problem I have is that I cannot get the existing support beams to check out. They fail under flexure at 150% using 36ksi steel. If I check with 50ksi they just barley work 103%. However, I do not believe...
Any experience with truck scale foundation design and weights and measures requirments. I designed a truck scale with grain dump within an enclosed building. Pit walls 9' tall and scale load cell piers 6' tall. 2' thick sidewall which support building columns covering the scale, and all...
I have a 100'x160' Pre-Engineered building sitting on mass column piers 5'x5'x3'-6" deep and a 8"x3'-6" frost foundation around the perimeter. I have a conveyor pit 10' deep 18' wide 150' long (open top - no heat) going out the side of the building. Question... What do I do under the pit...
Question concerning agricultural code requirments? I am designing a mat foundation(14'x24'x18" thick) (12" below grade) in Iowa supporting a grain bin and head house on a 10'x20' steel framed structure. Frost protection required depth is typically 42" in this area. The structure can tolarate...
I am referencing the following thread (thread507-109522) in search for the 3-page paper titled "Oil Storage Tank Foundations" by Irving E Boberg. Any help in locating this paper would truelly be appreciated!
