First time post here, thank you for such a great resource! I've done a lot of research but am hoping I can get some help building a pretty large pergola.
I'm trying to be my own master contractor and hire subcontractors to build a long freestanding pergola with no post in the middle. My plan is to have an architect draw up plans, but before I started spending money I'm trying to see if this is even a viable project that a pretty handy person can manage. Basically am I crazy for attempting this?
Property details
– main structure is a duplex
– there is a detached four car carport/garage 12' from the back of the main structure.
– trying to cover the space between the garage and the house with a slight hang over both structures.
Project details:
– 24' L x 14' W.
– I am hoping that a steel beam could span the length with no post.
a) What's the max length span? It would be preferable to go greater than 24'L.
b) Any guesstimates on what a beam this size would weigh?
– Would 8" x 8" wood post be strong enough?
a) how deep do footings need to go and how close can footing be to house foundation?
Best Answer
I wouldn't bother with an architect.
Hire a structural engineer if anyone.
You want a 24' long beam, probably two? with just some minimal loading from open air beams that sit on the two 24'L beams? A quick diagram would help.
24' is long but I've done wood PSLs 5.25"x11.75" that open air span more than that and support floor and roof loads.