Even if you used C24 span tables show 4x2 C24 as just under 2m at 400mm centres.
I'd say it will sag very much as you seem to have gone about 3x the recommended span even for 4x2!
We've got a small 40m2 parking space type area to the side of our house that we're trying to buy from the local council and we have some questions.
After finally finding out the right person the speak to about it we've been through the process of paying for a RICS surveyor to come value it and...
Well I'm 40yo and I was maybe 10 when I remember my dad having it. It was pretty old back then so clearly not the same as you get now. I can understand that the modern ones are significantly safer with the guards.
I agree about good practice making things safer. I work on the Railways...
Nope I didnt know that. I have no idea if mine will exceed that as it is not mentioned in the literature for the Saw I have although google says it'll take up to 3/4'' however it goes on to talk about the need to remove the crown guard to accept the Dado stack and is therefore not acceptable in...
Thats not actually true. My Laguna Fusion 3 table saw will take a Dado stack.
the issue with table saws accepting dado stacks is that the smaller saws use a bolt to hold the blade in place over an Arbor with nut, or the Arbor itself is too short to accomodate the width of the Dado stack.
To...
I've been Self building a 65m2 single storey extension since March. In that time since I started the only thing I've consistently managed to get delivered is skips and the Mixamate concrete for the footings! Everything else has come from multiple places as no one has the stock for everything...
Has he already started laying bricks/blocks elsewhere? IF so it's his problem to fix. Its really a pretty basic issue to have to deal with and as woody has pointed out they should have spotted it.
I'm no bricklayer but even I knew to check the gauge of the brickwork I built up to so as to...
I-Beams would likely span that distance and they normally will do the roof design for you too if you give them the size and loading requirements of it.
Add to that the current the timber prices and you might find it isn't much of a cost difference compared to normal timber.
I'm trying to find a span table that has the above size on it.
Does it exist?
I've got a flat roof that looking at the tables I can find a 220 x 47 isn't quite strong enough but 250 x 47 could work.
To go up to the larger 3'' width stuff could add a fairly significant price to the roof so...