(for some reason the attachment comes out upside down so I posted it 2 ways.they're both the same image. First step, lets collect all the given information within the question: Ceiling not attached to rafters and a snow load of 30 psf: Use Table R802.4.1 (3) Roof Rafter Spacing: 12 inches. Now looking at my drawing, can I consider the span to begin where the new rafter is fastened to the existing top chord, rather than beginning at the wall? In other words, does nailing the rafter to the chord count as support? If so I can go out to an overall width of 12' for the lean to while not overloading the rafter. One goal is to make use of a lot of extra lumber I have, which includes 2å's for the rafters, so I'd like to push it out to 12', on 24" centers.Īccording to the span charts, the limit of a 24" OC 2å is 10'9". The rafter spacing is 24 inches (610 mm) on center with a horizontal projection of the rafter span of 16 feet, 4 inches. For example, standing seam metal roofs require a minimum of 2 inches between rafters, while corrugated metal roofs can have up to 4 inches between rafters. MAXIMUM RAFTER/COLUMN AND END COLUMN SPACING 5.0 FEET will eventually be enclosed but will not have ceiling or insulation. The average distance between rafters on a metal roof is 24 inches. Length will be 54' long and as wide as I can make it in the space we have. There are many aspects to consider, including rafter spacing and beam length. We have all the information you need to get started on creating a beautiful space for your outdoor patio. The new roof will slide under the existing metal. Check out our guide on how to correctly measure and choose dimensions for your pergola. To keep things simple, I'm planning on sliding the new rafters alongside the chords and resting them on the top row of banding. Our existing barn is a typical pole barn with 12" eaves and 2å top chords on the trusses. FOR ROOF PITCHES OF BETWEEN 15 AND 45 DEGREES. 4.4.5.2 A roof assembly that has metal sheet roofing fixed to metal purlins, metal rafters or metal battens shall have a thermal break consisting of a material. We're planning a quick lean-to addition in a few weeks when I have a couple vacation days due. roofs for dwellings or ask your Building Control Officer for advice. Truss and rafter centres when using metal roof sheeting are spaced to a maximum of 1 400mm using 76 x 50mm purlins refer Standards Lå .6.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |