measure between each post along your beams and equally divide that number by the number of rafters. 16 inch on-center is the maximum spread we use, anything smaller such as 12 inch is fine and easier to math for a uniformed look. mark the top of each inside beam every ? inches on both sides of the pergola for the rafter position marks.
given that most decks are less than 12 feet tall or so, 6x6 posts can support the loads from nearly any typical deck framed with standard dimensional lumber, as the maximum spans of the joists and beams limit the area and the load any single post must support. the only real question is when a 4x4 will not be strong enough.
for a very small pergola with only 4 to 6 feet between posts, 4×4 supports will work. for anything larger, though, the 6×6 stock will not only offer a beefier look and greater carrying capacity, but 6×6 also resists the twisting associated with the more spindly 4x4s. make sure the post material is rated for ground contact.
some use the existing guardrails as pergola posts while others go a different route. a rule of thumb for me is that i like to connect my pergola post to the deck framing directlyand add blocking between the joists to support it yet further. if i need to make any alterations to the guardrail, then i do so on a case-by-case basis.
every pergola can be customized. you can choose from our standard sizes and options or if you dont see a size or detail youd like just let us know from the forest, for the forest since 1995 a creative roof treatment by one of our customers. 35 x 13 custom pergola in california redwood with 10 and 11 post heights.
when building a pergola what is the maximum distance between posts? answer. wiki user what is the standard spacing for pergola rafters? i am building a pergola attached to the house. my span
need pergola rafter span advice. help. i'm putting in a large patio pergola, 18' x 18'. i'm planning three 6'x6' posts spaced 10' apart along the back and three across the front with 2x10s sandwiching the posts to form the main beam support. these will only span 10' each with bolts through the posts.
you would require three post to cover the 6.5 mtrs of beam length. if you can source a beam of 6.5 mtrs long in one piece the size required would be 240 by 45 in f5 or f7 or mgp 10. there is no maximum length for battens. the 1200 you are looking at is the spacings between the battens.
maximum cantilever of a 2x8 is 24 at 16 o.c. maximum cantilever of a double 2x8 beam past a support post is 12 maximum span of a double 2x8 beam is 6. the standard size of most cardboard footing forms is 8 in diameter. this may change depending on your locale. check local building codes to confirm all span and spacing information.