Patio Roof Post And Beam Sizes

Patio roof beams beams can be solid lumber or be built from lengths of 2 by lumber nailed together with 1 2 inch pressure treated plywood spacers in between this forms a 3 1 2 inch thick beam that is equal to the width of a 4 by post.

Patio roof post and beam sizes.

An essential part of planning a patio roof or gazebo project is determining the number size and spacing of rafters beams and posts according to the loads they will carry. The way the porch roof is currently framed each of those 6 x 6 posts is carrying part of the roof load. The 2012 irc code calls for a minimum of a 32 o c. In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts.

If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts. Leave a reply cancel reply. Microllam beams are available in numerous sizes and can span large distances. We have learned from our experience to use at least a 3 1 4 x 131 groove shank nail in a column of four every foot apart down the laminate.

A 4 by 10 can usually span up to 12 feet between posts. This tells you the size of the beam needed to support the porch s roof. This means the example porch would need a 6 inch by 8 inch beam. What kind of board can span 16 ft for a wall pergola home patio cover plans build your or deck patio roof beam calculator cantilevers in the 2016 code professional deck builder patio cover plans build your or deck.

Patio roof beam calculator september 10 2016 by arfan leave a comment deck beams and posts beam spans post sizes by alter how to attach a patio roof an existing house diy pj roof beam span table newgroun co a to residential decks and patios city of saskatoon roof beam span table newgroun co. Calculate the initial value for d then round it up to the nearest inch. Measuring pergola dimensions learn the standard. Patio roof beam calculator.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. The beams can then be boxed in much as you had planned to do with the 2 x 10s. In the example d calculates to 7 75. Beams of more than one ply must be fastened together with either nails or bolts.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Staggered pattern with at least a 3 x 120 nail.