reinforced concrete/steel

[Anonymous]

how to make reinforced steel concrete slab like the one that commonly used in the highway bridge/flyover? i want to show in 3d section, and section drawin.

[Anonymous]

Please post a sketch, picture or really good description of what you mean. Overpasses vary be region. Steel box beams, concrete girders, concrete box beams, etc.
Do you need this for CD's or merely a "realistic background". Without some details it is hard to help you.
Snap

[Dwight]

I would assume that you mean a special concrete pre-cast section.
Study the Complex Profile feature best explained in Eric's article:

Eric Bobrow's splendid article

[Thomas Holm]

Re: what's possible with complex profiles:
The grandstand (to the right) in this competition pool hall is made out of just two complex profiles, one for the seating benches, and one for the stairs. (rendering Artlantis 2)

[Anonymous]

One more thing.
An easy way to end the C.P. is to have them butt into a wall. In Thomas' example maybe a wall with a slant similar to "rise-run" of the bleachers using a roof as operator and SEO as operator.
Or better yet, try Encina's Objective as capping and operator all in one.