Bought all my boards for decking while Wickes had a 40% discount offer in place .... now time to get on with it.
The 'idea' being to end up with : http://tinyurl.com/bu6pg52
I bought the "Decking construction plans ebook ... and have turned this sketch into a proposed plan.
The manual advised 150 joists at 400 centres when boards run at 90 deg, and reducing centres to 275mm when boarding diagonal ..(reason- to keep fixings at 400 centres)
I have drawn up as following layout ... http://tinyurl.com/cp2lo47
The left hand side originally I was going to use joist front to back .. but at 3.5m long pretty sure these would be too much of a span for 150mm.
So thought about a support beam running left to right of 150 x 50 ... then the joist run from front to that and same for back size of joist span then reduced to under 1.8m which should be OK.
Using 150 x 50 for the joists ... around perimeter again 150 x 50 ... there will be some 150 x 50mm spacers then a 100 x 50 outer ring, this has 2 purpose ... it allows me to fit a 100mm wide horizontal trim around edge of deck .. and creates a bit of a shadow / offset hiding the 150mm joist & concrete pads.
I will fit a fascia onto this 100 x 50 ... maybe a piece of deck board, or maybe just plain 100 x 25 or similar.
Construction is in effect: http://tinyurl.com/bq4gyqb
Couple of Q's:
Posts will be 100x100 resting on concrete pads .... arranged these so no more than 1800 apart .. is that OK ? ... don't want more than I need (or less)
4 of the posts come up though deck to become the 4 corner pots for roofed section.
Not sure what to use to fix posts to pads ... guess I don't need to fix all of them, maybe corners and couple in middle .... could use
http://tinyurl.com/c5ygora
or
http://tinyurl.com/bmqdc92
Is my assumption of front to back joist correct ... i.e. 3,5m would be to long and having them connect to middle 'left to right' beam correct ?
If so the Q is then .... do you typically skew nail joist together ... or use mini joist hangers :
http://tinyurl.com/ctd4ddb possibly with a skew nail at top
looked at longer hangers .. http://tinyurl.com/cek7hbe
but if these are folded over top of joist it will stop boards lying flat.
I could use something like this ... http://tinyurl.com/bp7xlr4
But open to suggestions.
Read more: http://www.diynot.com/forums/garden/dec ... z2SRgHu8hK