also the posts are already in place as we are tearing out the existing pergola with center post. they are 9' - 10' diameter pine set in concrete and with a concrete skirt 36' high. will these posts support the beam. i appreciate any advice you can give me. we have built many pergolas here but nothing with a span so long.
pergola questions hi everyone. you can use 2x4's on edge or even 2x6's on edge for 12 foot spans. 18 feet is a long way to span, but not impossible.
i'm building a pergola on my deck in the back yard. the deck is 16 feet long and 12 feet deep front to back . if i use a 4x4 in each corner, my span from one side to the other , using 2x8 lumber would be almost 16' long.
if it's a 'closed' solid roof system, then it must be able to withstand snow loads. i know, where you live you don't get snow, but to meet code, it needs to support a minimum of 20 lbs. per square foot of snow. therefore, with a closed roof system 2 - 2x6 redwood joists can span about 12' -6' when supporting 4' of roof.
douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no. 1 and no. 2, are indicated below. max. dead load weight of structure and fixed loads 15 lbs/ft 2.
western wood products association western lumber span tables base values for floor and ceiling joists and roof rafters for dimension lumber computed with
maximum span of a joist for a pergola 06-05-2016, 09:36 pm i would like to cover a concrete patio we have with a pergola, however i would need to span 27 1/2 feet. pergola beam span to shorten the span, install two additional posts to bring the centre distance to around a maximum of 10' less if possible .
span calculator for wood joists and rafters available for the iphone. span calculator for wood joists and rafters also available for the android os.
this is a pergola thing? no actual roof - just slats? no, a 2x6 will probably not collapse under the weight of a few. 2x2 slats. yes, a 16 foot 2x6 may look like a pretzle. after a year in the sun and rain without support. i. personally would use a much deeper joist. i don't know. what the code is here, but would guess around 2x10 is needed.
here's how to plan and post a perfect pergola. but span too far and the girders will 'smile' as the center bends to the earth. here, i used two 2 x 8s spanned 10 feet from post to post. to get
for example, in the rafter span table below, the highlighted cell in the 40 live load table , indicates that 2' x 8' southern yellow pine joists, that have a grade of 2, that are spaced 24' apart, can have a maximum span of 10 feet - 3 inches 10-3 if designing for a live load of 40 lbs/ft 2. rafter span tables