Customer: I would like you use W21x50 steel I-beams for a bridge over a stream. There will be concrete abutments at each ends. There will be concrete abutments at each ends. The length of the beams will be 44.5' from abutment to abutment.

The stringers will be spaced 7' apart o.c. I am using 2 W21X50 wide flange beams for stringers. I am going to put 3"x3"x3/8" cross bracing every 15'. Do I need horizontal bracing between the cross bracing? Should the bracing be bolted to the tabs welded to the web of the stringers or can it be welded directly to the web of the stringers?

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Notes of calculations of composite beams strength. Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts.

Customer: I have a 35 foot span, huge concrete abutments, four W18x50 beams @ 48" OC for 12 foot width, 6"x12"x14' treated decking nailed to 4"x8" treated runners bolted to I beam top flange, welded cross bracing at 12 feet ( two rows).

Using three beams - if you can provide lateral bracing of the beams (this can be accomplished with a perpendicular beam or X-bracing) at 15' o.c., you can plan on W21x50 ASTM A92 Gr. 50 beams. This is sized for a DL of 10 psf and a LL of 60 psf (minimum for an elevated walkway) and has a deflection of approximately 7/8" under a full design load

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The size of the steel beam itself is a W21x50 beam and the steel grade is ASTM A992 Gr. 50 Customer Is it possible to get a drawing showing the beam and the supports? 106" from concrete to beam.

2012年4月17日 · I am building a bridge with a 60' span. The stringers will be spaced 7' apart o.c. I am using 2 W21X50 wide flange beams for stringers. I am going to put 3"x3"x3/8" cross bracing every 15'. Do I need … read more

I’d like to point out that a Professional Engineer’s standard of care typically includes a site visit to assess field conditions and get an overall understanding of the structure.