new garage with room above

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hi guys
am building a garage 20x34ft,would 9x2 be ok for the floor for a room above
 
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hi guys
am building a garage 20x34ft,would 9x2 be ok for the floor for a room above

No. If the internal clear span is less than 16' then maybe.

if the clear span is 19 feet or so then you may be looking at engineered joists, or a mid-span steel.
 
well its just under 18ft wide,its only going to be a guest room with only a bed at top
 
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hoping you wasnt going to say that :(
ive got the timber now,would it not be safe then?
 
hoping you wasnt going to say that :(
ive got the timber now,would it not be safe then?

It won't snap no. You may get around it with ply sheathing and 1/3rd span bridging but you will need the advice of Shytalks. ;)
 
The timber may well do the extra 1.5' or so, as the dimensions in the normal span tables are conservative. Or double up (and bolt) every 3rd joist

Just make sure it has noggins at 1/3 span to keep the floor rigid
 
The timber may well do the extra 1.5' or so, as the dimensions in the normal span tables are conservative. Or double up (and bolt) every 3rd joist

Just make sure it has noggins at 1/3 span to keep the floor rigid

was just about to ask if i double up a few:cool:
 
one more thing,is it ok for the raffters not to be conected to the floor timers,so i can get a bit more head space upstairs
 
one more thing,is it ok for the raffters not to be conected to the floor timers,so i can get a bit more head space upstairs

How so?

It is possible to fix a wall plate to the topside of the floor joists, thus gaining a few more inches.
 
well,am over here in ireland building a house for myself which is almost done now
just started the block work and up to 11 blocks high,looking at a garage the otheday,they have the floor timer on the 11th block then block inbetween them,then two more on top then fit a wall plate
ive got pics but cant seem to post on here?
 
yeh not to to happy that way now ive been thinking about it
do you think i should do it the otherway,with a wall plate on top of joist then bolt the rafters onto the ends
it should still give me some room upstairs plus be a better job?
 

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