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loft floor joists

Postby billyboy999 » Wed Nov 12, 2008 6:54 pm

how far apart should the bolts be when bolting new joists against old ones in loft conversion
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Postby ollyburton » Sun Nov 16, 2008 10:14 pm

hello there is this not on plans as depends on original joist size new joist size but 400 mm is safe enough
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Last edited by ollyburton on Thu Feb 03, 2011 5:51 pm, edited 1 time in total.
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Postby billyboy999 » Fri Nov 21, 2008 6:17 pm

thanks olly, what size should bolts be. by the way my surname is burton as well.
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Postby mdpmspitfire » Wed Nov 26, 2008 9:48 pm

i would suggest using bzp m12 coach bolts or studding. use a large plated washer also. offset the bolts from the center line also to spread the compression which will help to minimise any splitting if the timber moisture content reduces in the new timber.
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Postby TheDoctor5 » Fri Jan 30, 2009 9:12 am

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