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I am designing common supporting platform (20 ft above ground) for 3 cooling towers (shaped as solid parallelepiped 14 ft width, 48 ft length and 18 ft height) with 9 ft space between them (14 ft 1st tower, 9 ft space, 14 ft 2nd tower, 9 ft space and 14 ft 3rd tower). Should wind load...

My company designs and builds custom enclosed skids and I am in charge of writing fabrication tolerances specifications for piping and structural steel base and framing. Any sample or go-by would be greatly appreciated. Thanks, Ibro Vehabovic

Sorry I missed Subject in my previous post. I designed cooling tower structure (per UBC'97, Seizmic Zone III) and provided foundation load w/ base plate detail to the customer who will design foundation. I specified standard oversized 1 3/4" hole for 1 1/4" anchor rod and customer asked why...

I am designing lifting “trunnions“ bolted to skid base. Skid will be loaded and unloaded several times during shipment and therefore these trunnions will be also bolted and unbolted several times. I would like to use the same bolts. In this case which bolts should be specified? Thanks in...

I am designing lifting “trunnions“ bolted to skid base. Skid will be loaded and unloaded several times during shipment and therefore these trunnions will be also bolted and unbolted several times. I would like to use the same bolts. In this case which bolts should be specified? Thanks in...

I am checking a structure and foundation of an old shop metal building. There are no drawings probably because first owner built it by himself. All steel structural members are accessible and measurable but anchor bolts and concrete foundation. What is the cheapest method for getting required...

I am checking a structure and foundation of an old shop metal building. There are no drawings probably because first owner built it by himself. All steel structural members are accessible and measurable but anchor bolts and concrete foundation. What is the cheapest method for getting required...

I need stress tables for rectangular plates loaded with concentrated force or uniformly distributed load on small area on different locations. Roark's Formulae book does not have these cases. Does anybody have them or good references? Thank you, Ibro V.

What is reasonable impact factor for skid (about 50-60 ton weight) during lifting using Allowable Stress Design ASD. Is 25% to low? Any reference would be greatly appreciated. Best Regards, Ibro V.

Grating bars (2" high, 1/4" thick and 36" length) are spaced 2-3/8" on center. On top of bars there is 14GA perforated diffuser plate welded to bars (no crossbars). How to calculate allowable bending stress and unbraced length for these bars. What is required size and...