Porch Roof Support Structure

It is a waterproofing layer made of regular felt stacked above the solid.

Porch roof support structure.

The roof structure consisting of the roof framing roof decking sheathing and any internal bracing also functions as a horizontal diaphragm and transfers the horizontal loads imposed on the roof to the supporting walls below. Concrete slabs can be poured at any height and offer many different finishing options. Your porch roof will need to have a lot of support in order for it to stay up through the seasons. If you are thinking about replacing old rotted porch posts the first thing you ll need to know is how to jack up and support the roof structure properly and.

If there is also a beam in the middle of the roof divide the total load by three. The ceiling joists are laid out turned on edge usually 2x6 or 2x8 tall creating a flat level framework for the rest of the work. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. For larger porches such as wrap around porches you will want to make sure that the support is more than you need.

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. Find columns at lowe s today. If our example roof has only one beam it must carry half of the total load or 4 000 pounds. The larger the roof is the more support that you are going to need.

Building a porch roof using trusses the simplest form of a truss is one single triangle with fixed sides. They are extremely strong and normally constructed off site and made to specific measurements. A planar truss like the one above lies in a single plane and is usually used together to form the roof support structure. Roof failures are often observed on areas of the building where wind pressures are concentrated.

Porch foundations from slabs don t have to be just at ground level. While it is not within the scope of this guide to provide detailed instruction in the actual construction of a porch we feel it is important to have at least a basic knowledge of the structural aspects as they greatly effect the overall success of any porch. Proper porch design is not possible without an understanding of the structural components.