Sizing Roof Supports

Building a roof over a deck allows you to grill relax play or simply stay quiet and listen to nature whether rain or shine.

Sizing roof supports.

The lengths and sizes of joists vary depending on the species and quality of the lumber used. While i know your idea seems logical and it might work consulting with an architect or engineer is the only way to know for sure. For heavy roofs or in. This sizing guide for roof rafters will help determine what you need for your small project.

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. A ridge board is a non structural member that serves as a prop for opposing rafters to rest against and connect to. Ridge beam sizing is based on the span of the beam between supports and the amount of roof load supported by the beam. For example you can span a 1 grade no knots southern yellow pine a greater distance than a 2 grade with knots southern yellow pine.

Roof framing suggestions canadian guidelines. There are several variables to consider when determining the proper rafter size. Raised floor homes look great and protect homeowners against risks from flooding and subsiding soils. The sizes of your porch roof framing members their spacing the type of.

In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. If one side of the roof is supported by the house and the other side is supported by the beam divide the total load by two as the beam is only supporting half of the roof. Maximum rafter spans for a patio roof. If there is also a beam in the middle of the roof divide the total load by three.

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. The 1 grade. A roof on a treasured deck can open up more possibilities for enjoying the space throughout the year. There are a lot of variables to consider when sizing a supporting beam for a porch roof or any area in your home where a load must be carried.

Wood beam calculator american wood council website rafter and joist span faq. This article excerpts from provides copies of roof framing suggestions from canadian building codes and the cmhc wood frame house construction guide. Both diyers and building professionals will like these garden and outdoor living ideas and plans. There are a few things to know before erecting a protective roof.

Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter.