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Author Any structural engineers on here?
baza31
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Registered: 19th Apr 03
Location: yorkshire
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15th Oct 12 at 18:11   View User's Profile U2U Member Reply With Quote
I need to put in a floor in loft( for a bedroom) span is roughly 5.2m x 4.5m . What size timbers for floor ? Also how many need to be sat ontop of the wall . Or does it need steel? If so roughly what size and what space between then ? Was thinking 8x2 sat onto off wall (x4) and 8x2 running off that. Is that upto regulations or am I miles off?
sc0ott
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Registered: 16th Feb 09
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15th Oct 12 at 19:06   View User's Profile U2U Member Reply With Quote
Whats wrong with the bottom chord of the roof trusses?
Dave
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Registered: 26th Feb 01
Location: Lancs
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15th Oct 12 at 19:24   View User's Profile U2U Member Reply With Quote
How do you know it has roof trusses?
sc0ott
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Registered: 16th Feb 09
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15th Oct 12 at 19:46   View User's Profile U2U Member Reply With Quote
I dont, but i would be expecting a reply as to what is there if there isnt.
Dave
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Registered: 26th Feb 01
Location: Lancs
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15th Oct 12 at 19:52   View User's Profile U2U Member Reply With Quote
Seems more likely to be traditional if its being converted though.
Mad Moe
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Registered: 14th Jun 01
Location: Northumberland
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15th Oct 12 at 19:58   View User's Profile U2U Member Reply With Quote
Traditional in what sense? A traditional roof structure is still made with trusses
Dave
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Registered: 26th Feb 01
Location: Lancs
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15th Oct 12 at 20:04   View User's Profile U2U Member Reply With Quote
Traditional as in not using trusses.
Mad Moe
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Registered: 14th Jun 01
Location: Northumberland
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15th Oct 12 at 20:10   View User's Profile U2U Member Reply With Quote
So with rafters and purlins? Either way I doubt 8x2 would be adequate to span 5m. Just read up on the building regs as you'll require building regs approval for converting your loft space into a bedroom
sc0ott
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Registered: 16th Feb 09
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15th Oct 12 at 20:17   View User's Profile U2U Member Reply With Quote
I recon if they span across the 4.5m part, 47x220 beams at close centres should do.
Mad Moe
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Registered: 14th Jun 01
Location: Northumberland
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15th Oct 12 at 20:23   View User's Profile U2U Member Reply With Quote
Just had a quick look and it would appear you can span up to 5150 if the joists are 220x75 at 400 centres
baza31
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Registered: 19th Apr 03
Location: yorkshire
User status: Offline
15th Oct 12 at 20:47   View User's Profile U2U Member Reply With Quote
Hi it has no trusses just has 3 big beams holding roof up from gable to inner wall. Sorry for being vague

 
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