Carport with Lean-to Type Roof

[slickmullet]

I'm looking to build a carport with a lean-to type roof. I'm planning on sinking 3 or 4 4x4x12's 3 feet in the rear run and concreting in and then 3 or 4 4x4xx12's 4 feet in the front to create a roof pitch. The foot of drop may be too much? Any ideas or thoughts?

 

[JohnD]

the manufacturer of your roofing material will specify the minimum pitch required, and the support needed. However bear in mind that you may be leaning ladders or sitting on the frame during construction and you are heavier than the roofing. If you are in an area of heavy snowfall there will be a code for weight-bearing roofs.

A lean-to typically does not have legs where it meets the house, but a ledger or beam bolted to the house wall (protect against water penetration at the join).

I would not sink wooden posts into the ground because they will rot. You can use concrete pads or incorporate pads into your concrete raft, if you have one. Mine are raised 100mm above ground level with a steel socket bolted to the pads, or you can get cast-in sockets. There is an air gap between the bottom of the post and the base of the socket to prevent water collecting, and the posts are under cover of the roof anyway. A gutter will reduce the risk of water cascading off the roof and blowing onto the legs.

Try to position your legs so they are not likely to be hit by the vehicle doors carelessly opened.

Larger legs at the end of the structure, and a large end beam, give a visual impression of solidity.

Your area may have regulations about maximum height and fireproofing. This is a UK site so materials and regulations will be different.

 

[tony1851]

4 x 4s are not really substantial for a carport , particularly if you have a high snow load - consider 6 x 6s

 

[theprinceofdarkness]

Carport roofs can get an uplift due to the wind so the actual roof needs to be fixed down very securely. For a carport I helped with, the BC required that the whole roof was sheathed in 6mm ply before the battens and tiles were fixed on.
Frank