Does anyone know exactly how the LADOTD developed the pile capacities published in their Bridge Design Manual? It does not appear to be the standard bearing capacity formula for PPC piles as the subnotes state that the indicated capacites are based on L/d values ranging from 10 to 25. The...
I have a pretty straight forward problem, just not a very clear way to rectify it. I have a pre-engineered metal building that will essentially be a barn. The only concrete will be the individual footings that support (and anchor) each column, i.e. there will not be a slab or other element to...
I am analyzing an existing W10x88 compression member that is has (2) 1/2"x9" plates, each welded to the top and bottom flanges so as to 'close in', or 'box in' the member. Furthermore, while the W10x88 is over 40-ft long, the 1/2" plates are only about 15-ft long and centered about the midpoint...
We have a client in the communication industry that would like to use A576-95 steel bars in lieu of A572 Grade 50 steel bars. Does any one know of anywhere we can get some good information regarding A576-95 material.
I am designing some offshore steel welded boxes that get loaded with about 25 barrels of drilling mud & cuttings as the well is being drilled. The client would like it designed in accordance with API RP2A. I feel this code does not provide much design basis for this situation. Does anyone...
I have two different equations that indicate how to calculate the natural frequency of a beam. The first eqtn is from my old college books that simply indicate the frequency calculation for a simple beam as f = sqrt(g/deflection), where as a diffent book of mine indicates that the natural...
I am designing a CMU wall that must be 12 inches thick. The owner does not want stack bond. He likes the look of 1/2 running bond. However, the corners do not work out well. What type of running bond could be used to finish the corners where they look okay?
Thanks Darthsoilsguy. However, we too have the SJI manual you referenced, but we were hoping that there was a similar manual that addressed hot rolled shapes. Do you know of such a manual?
I am working on the renovation to several existing steel frame buildings built throughout the mid 1900's. Is there a site or publication that I could go to and get the information on the most probably section and materials that were used.
I'm working on designing and embeded, cast-in-place anchor, that I can use a standard heavy hex nut to connect the base plate to. However, the tensile loads are too high and spaced too close to use typcial j-bolts or headed studs. As such, I would rather have a rebar that is threaded on one...
I designed a structural steel skid supporting an engine. The owner would now like to lift the skid inplace with a helicopter. I was wondering what codes or standards may be available to check the skid against. Everything from the military and FAA seems to relate to the helicopters only and...
I've been asked to load rate a concrete structure that was constructed in 1967 and I have been provided with the structural drawings from the original design. However, the drawings indicate that the floor joists under consideration are 5x12+3@25". I am certain that the joist is 5" wide at the...
