Agriv8
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| posted on 23/4/13 at 07:23 AM |
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Builders Joiners Decking Frame material Size 16ft X 10ft?
Builders Joiners, Decking Frame material Size 16ft X 10ft?
The frame under my decking boards has started to rot and sag so I need to look at replacing it.
Decking is 16ft by 10ft , 16ft is the direction of the beams with 2 or 3 cross braces between each Span decking board run 90 degrees to the beams.
Each beam is supported in the middle by a paving slabs / packing and will be a single beam 16ft long.
The decking is Rawl bolted to the house 1 end and the pond (breeze block construction concrete filled centre) the other ( 4 M12 rawl bolts either
end )
The corners will be a simple Lapp Joint ( as 1 end can be seem ) and the internal 3 beams will be on Beam hangers.
So I need to decide what size tanalised wood to go for the frame ? thats the bit I am stuck on.
I have 2 very good builders merchants close that will deliver free for orders over £50
So over to the Collective
Thanks Agriv8
Taller than your average Guy !
Management is like a tree of monkeys. - Those at the top look down and see a tree full of smiling faces. BUT Those at the bottom look up and see a
tree full of a*seholes .............
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40inches
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| posted on 23/4/13 at 09:32 AM |
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The same size as the old frame?
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Agriv8
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| posted on 23/4/13 at 11:23 AM |
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quote:
Originally posted by 40inches
The same size as the old frame?
I could but Its made from second hand floor / roof joists so not tanilised and not sure of the size until I pull some bords up.
As I will be paying for New thought I had better go for a recomended size.
Have I managed to stump 'The LCB collective'
Ta Agriv8
Taller than your average Guy !
Management is like a tree of monkeys. - Those at the top look down and see a tree full of smiling faces. BUT Those at the bottom look up and see a
tree full of a*seholes .............
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mark chandler
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| posted on 23/4/13 at 11:36 AM |
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I used 6" by 2" over a 4m span in my garage, it deflects around 1/2" in the middle now I have a bit of weight up there but
it's not bouncy.
Only cost £100 for 8 lengths I think, direct from a sawmill 
[Edited on 23/4/13 by mark chandler]
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v8kid
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| posted on 23/4/13 at 11:59 AM |
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more supports are the answer
100x50 nominal cls beams at 600 centers supported every 1.5m is solid and it only requires 1 extra support
cheers
You'd be surprised how quickly the sales people at B&Q try and assist you after ignoring you for the past 15 minutes when you try and start a
chainsaw
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tompat3463
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| posted on 23/4/13 at 05:16 PM |
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as a rule of thumb for floor joists in a house.
if you measure the span in feet, half the number then add 1 will will get the reccomended 2by number
example. SPAN= 12foot , half of 12 is 6 , 6 plus 1 is 7 you for this example ypu would need 7x2 joists.
The correct type of timber is a large factor to.
Floor joists in a house should c16 which is a graded type of timber for structural work.
I implement these rules for any decking I do so I think ive got your answer.
Cheers Alan
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v8kid
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| posted on 23/4/13 at 06:35 PM |
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quote:
Originally posted by tompat3463
as a rule of thumb for floor joists in a house.
if you measure the span in feet, half the number then add 1 will will get the reccomended 2by number
example. SPAN= 12foot , half of 12 is 6 , 6 plus 1 is 7 you for this example ypu would need 7x2 joists.
The correct type of timber is a large factor to.
Floor joists in a house should c16 which is a graded type of timber for structural work.
I implement these rules for any decking I do so I think ive got your answer.
Cheers Alan
Cool ROT ( rule of thumb)
I think this allows for notching for services - mainly plumbing and central heating so in this respect it is OTT. [I do like my TLA's] Also
decking is not expected to be as rigid as house floors - a certain ammount of springieness adds to the ambience don't you think?.
However it (the ROT) illustrates the importance of intermediate supports - double the supports and half the joist size!
A further advantage to more intermediate supports is the load carrying capacity.
Eh! Do I hear you say?
What load?
Well I just spent a superb weekend at Loch Fyne in a rented holiday cottage with a wood fired hot tub. It was sublime! Fresh mussles picked from the
seashore by moi accompanied by a few bottles of bubbly - And?
Yup the hot tub was on the decking. It was 8 feet dia and 3 deep.
I needed the bubbly to stop worrying it I was going to be washed out to sea by a hot tub tidal wave!!!
To cap it all for the first time I found a pearl inside a mussel! -what's more the decking did not collapse but was very
"ambience"!
So the moral is - plan for the unexpected.
Cheers!
[Edited on 23-4-13 by v8kid]
You'd be surprised how quickly the sales people at B&Q try and assist you after ignoring you for the past 15 minutes when you try and start a
chainsaw
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