Hi,
Originally had this in Gen Discussion but I don’t think anybody likes me there. I’m going to be building a landing on a two story structure and I would like to know what size lumber I will need for the posts and beam. It will approx 7’x4′ landing. Also, what a suitable way to secure to the existing slab?
Thanks so much,
Mike
Replies
Don't take it personally
Everyone pretty much left this site to hang at BTclassic.
You always find it hard to get specific engineering advice online because of liabilities and insufficient info given.
For instance what are the local codes governing and what loads required? What other site conditions are not mentioned?
And how the beam is attached to the posts is a pertinent detail.
As drawn, you have the beam cantilevered over the posts and the deck cantilevered over the beam. How much would be a detail an engineer would look at.
And how tall are those posts? Taller and they need to be sized larger or have cross bracing attached
But in general, I could do this with dbl 2x8 beam on 4x4 select posts
Thanks,
Yeah, not sure why the software put in the cantilevers I won't be doing that. So where's BT Classic?
Thanks again,
Mike
Here you go
http://forums.delphiforums.com/breaktimeclass/start
Probably straighten up the drawing. Even most of the guys that left for over there aren't mind readers.
While a 6x6 is probably enough for the posts, take a look at what a larger member would look like-might be more pleasing to the eye in addition to carrying more strength.
The connection to your house is a very important detail. Many deck sites will show the upgraded bolting pattern for attachment as well as good flashing details.
Best of luck.
It's nice to see that old layout. i'm still struggling with the FHB forum. I've been looking around my neibourhood and I've yet to see any 6x6's (all 4x4's) used for the post on similar situations although what I read in books that's what's recommended.
Mike
In terms of weight-bearing capacity, 4x4 posts should be more than sufficient (and you should only need one). But you'd need one reasonably knot-free, and if the post is positioned where it's apt to get bumped (or have, eg, a clothesline strung from it) then it would be safer to go with 6x6 for lateral strength.
The basic design could easily be done without a post if a beam could be let into the structure framing for about 6 feet. The stringers may need posts mid-flight, however -- the stairs will be VERY bouncy without some extra support.