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Regarding the web plates installed on a beam splice, does anyone know why a diamond shape would be used in lieu of a standard rectangular plate? I have seen this on older structures and some erectors have mentioned this.

I need to design a concrete foundation for a motor, belt driving a line shaft. What do I need to calculate the forces from the motor/line shaft so I can design the foundation?

What are the implications from switching from a Tube Steel member, and using steel plate to build the section as a weldment assembly (other than the lower yield stress).

I have a short 8"x12"x1/2" TS column that is 5' tall, with one beam tying into it. Originally it was designed to support rolls of material basically resting on the top, with minimal lateral forces. However, there is now a need to push the load sideways on this column,introducing a signifcant...

Sounds good. It makes the calculations easy too. Thanks!

There is a timber floor (3" thick by 6" wide)spanning 8' between support beams. There is 1" plank flooring running transverse to the 3" timbers. How do I calculate the available floor loading, accounting for the 1" transverse plank flooring. I have the same question for a 3"x6" timber floor...

Thanks!

When I go to www.aluminum.com, it sends to me to Alcoa.com, but I do not see an "Aluminum Design Manual." Am I overlooking it? Thanks.

I have designed a steel pipe to be used as a support beam to support roll goods for material handling. The pipe spans 6 feet between support brackets, and therefore is over the allowable 50 lb weight limit for one employee to lift. I would like to look at designing an aluminum pipe to replace...

I need to evaluate an older steel structure, and wanted to know if anyone knew of a good site to get the properties of steel beams as the grades have changed throughout the century.

I agree. However, I need to show reasons why (via calculations) that it is unstable to prove that other measures need to be taken. Can anyone help with calcuating the torsion on this beam?

Kelowna, you are correct. The gooves on the top is where the load is applied (above the center of gravity). The load is not secured to the lifting beam, they are supported by shackles that rest in the grooves. Knowing the instability, and the type of beam and loading, how can I calculate the...

The article by David Ricker that Bridgebuster referenced above addresses the lifting lug and any tearout forces. However, I am still trying to calculate the beam only being a piece 5/8" flat steel (without any flanges).

What confuses me is that it is not laterally supported in any way. If I was rating a standard beam (monorail for example). I would first determine the estimated lift that I needed to pick and then verify if the current beam was adequate. In this case, it is 4000 lbs. I would add the dead...

I have a lifting beam that is detailed in the attached sketch (5/8" thick flat steel plate, 4'-1" long, 4" high, with 1 Lug Plate in the center). I to determine what the load rating would be on this. Any help with calculating this would be great.

Thank you JAE, those are very useful links.

I am looking at an existing brick masonry arch that is cracking at the center of the arch. Can anyone provide some references or help with calculations on evaluating the existing arch? If so, I can provide some detail on the arch in question.

We placed a 6 1/4" Slab on Metal Deck a couple months ago, and now there are small cracks above every support beam (which are 3'-9" on center). I have attached a drawing showing the resteel layout that was specified. Any insight to why this may be cracking would be greatly appreciated.

Thanks for your help, it does provide insight.

That is correct, I am mainly concerned with floor issues bad enough to cause trouble for fork lifts, specifically additional slab settlement. The fine sand material that the slab bears on averages 5 hammer blows on a 140lb weight falling 30' on 2"O.D. sampler, which is medium dense. My...