timber / steel equivalents ??

I am currently designing my first deck which will be all timber expect for the posts. I have info on timber posts, but not steel.

It is a second storey deck. I am unable to find any info on what size and wall thickness posts ,(duragal) , I will be required to use and wondered if the is any information out there for this. Also I require info on footings, as I want to bolt the posts onto the footings using base plates.

Currently the information I am using is Allan Staines - Decks & pergolas and Timber Qld - Residential Timber Decks

The deck will be 3.4 x 3.4 attached to house on second level.

Any info will be greatly appreciated. thanks Matt :D

As an idea for you I had a second story deck as follows. 3 posts at approx 3.2 metres height. each supported the end of a 6 metre steel bearer. The other ends were attached to steel beams that were originally cantilevered from the house. the posts wer 3.2 and 3.6 metres apart. i.e. deck of 6 x 6.8 metres An extra steel beam ran across the front of the 3 posts at the same height as the bearer. All this was specified by an engineer as follows

- The posts were 100 x 100 x 3.0 mm wall thickness. Grade 350 (whatever that meant)
- He specified 300 x 300 x 12 mm base plates. using 4 16x150 mm chemsets.
- Footings were 500 x 500 x 500.

These are of his specs I submitted to council.

I wanted to embed the posts directly in, which he was more than happy with for the same specs.

I can't be 100% but I think in the initial stages he said 75 x 75 x 3.0 mm was ample for the posts, but I think we went with 100 x 100 as it looked better asthetically (I hope that is how it is spelt)

Usual disclaimer of - That is what my engineer specified for my circumstances, and it may not be applicable to you

Technically there are no span tables for steel as all steel structures have to be engineered. There are however some span tables for RHS on the BHP website under Duragal. I have a copy here if you can't find them. me3 at neuralfibre dot com

Paul

There's 'Capacity & Load Tables' for Unipiers here:
http://www.bluescopesteel.com.au/go/...saght-uni-pier

I've used them before without having an engineers design, and it passed council inspection.