Length of Coach bolts?
Quick question concerning the required length of coach bolts... I'm
going to build a deck using 100mm support posts with 47mm joist connected with coach bolts. Question is should I use 150mm coach bolts or longer? Is the 3mm left over ample to tighten the coach bolt? Sorry if it seems obvious to some just never used coach bolts before. |
On 6 Sep 2005 14:57:22 -0700, "
wrote: Quick question concerning the required length of coach bolts... I'm going to build a deck using 100mm support posts with 47mm joist connected with coach bolts. Question is should I use 150mm coach bolts or longer? Is the 3mm left over ample to tighten the coach bolt? By the time you add a washer under the nut there'll be a bit less bolt available :-) Are the post & joist dimensions you quote actual or nominal? I would rather have a bit of bolt protruding from the nut. -- Frank Erskine |
The dimensions are off the order form so nominal... I was thinking the
same thing about the protruding bolt |
The message .com
from " contains these words: Quick question concerning the required length of coach bolts... I'm going to build a deck using 100mm support posts with 47mm joist connected with coach bolts. Question is should I use 150mm coach bolts or longer? Is the 3mm left over ample to tighten the coach bolt? Sorry if it seems obvious to some just never used coach bolts before. Even without a washer (you are using washers?) 3 mm seems a little inadequate. What you need to avoid is an unthreaded shaft length in excess of the thickness to be clamped but if the numbers don't add up you can get coach bolts that have a fully threaded shaft. I would have it that these are technically screws rather than bolts but don't blame me if the vendor doesn't appreciate the difference. -- Roger the Bodger |
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