The building block of many outdoor building projects is the dimensional lumber. Treated for ground contact applications, they support your deck, gazebo, and fence. They may even outline your favorite flower bed.
2x4x8
2x4x10
2x4x12
2x4x14
2x4x16
4x4x8
4x4x10
4x4x12
4x4x14
4x4x16
6x4x10
6x4x12
6x4x14
6x4x16
6×6
8×8
also other size beams 3x 4x