2006-12-29 03:20:20 · 6 answers · asked by JACKIE 2 in Science & Mathematics ➔ Engineering
Distributed load but not evenly. Timbers at 15" intervals are to run into it at right angles to it
2006-12-29 22:19:10 · update #1
The use of RSJ's has been banned for many years, and now you must use a BSB British Standard Beam. Why use a heavy and awkward to lift, piece of steel when you can use a lightweight steel box, 4 tons is not very much bearing on such a span, so a 16ft long 'CATNIC' type will be easy to fit and do the job.
http://www.keystone-lintels.co.uk/products/box_lintels_standard.htm
2006-12-29 03:35:03 · answer #1 · answered by My name's MUD 5 · 0⤊ 0⤋
9" by 4" would be my choice and for its size, the most economical @ 21 lbs per foot run. It will carry 16.7 tons distributed and give a deflection of less than 1/325th of the span. B.S. 449.
Fix both ends securely and use steel wall plates to spread the load. Don't load the bottom flange.
Check your steel suppliers spec's to make sure.
2006-12-29 22:44:16 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Depends if the 4 tons is a point load or distributed in some manner. Be specific.
2006-12-29 06:18:35 · answer #3 · answered by Peter T 2 · 0⤊ 0⤋
3- 2x 10's nailed together as a minimum, but I would normally use a 5 inch I beam, with a single adjustable steeel support post at mid-span.
2016-03-17 22:39:24 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Rsj Calculator
2016-11-12 00:57:53 · answer #5 · answered by buchy 4 · 0⤊ 0⤋
12x9 in my workshop
2006-12-29 07:32:01 · answer #6 · answered by huw 4x4 3 · 0⤊ 0⤋