4/28/2024 0 Comments Rafter spacing metal roof![]() We choose to include w k.I -0. In case you need to brush up on it you can read the blog post here. (for some reason the attachment comes out upside down so I posted it 2 ways.they're both the same image. Luckily we have already written an extensive article about what load combinations are and how we use them. The one difference is that we need to calculate the roof rise using the pitch. For calculations based on the roof pitch: The formula used to calculate rafter length from roof pitch is, in fact, the same as the one above. meaning that: rafter length (rise² + run²). 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. For calculations based on the roof rise: rise² + run² rafter length². Figure 1: Typical components of a hipped roof. One goal is to make use of a lot of extra lumber I have, which includes 2圆'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 2圆 is 10'9". The spacing of rafters can be determined from the design requirements, type of roof sheeting to employed, type and spacing of purlins, availability of materials, etc. One goal is to make use of a lot of extra lumber I have, which includes 2圆s for the rafters, so Id like to push it out to 12, on 24' centers. ![]() It will eventually be enclosed but will not have ceiling or insulation. Length will be 54 long and as wide as I can make it in the space we have. It will eventually be enclosed but will not have ceiling or insulation. The new roof will slide under the existing metal. Length will be 54' long and as wide as I can make it in the space we have. The new roof will slide under the existing metal. 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 2圆 top chords on the trusses. We're planning a quick lean-to addition in a few weeks when I have a couple vacation days due.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |