Wood Porch Roof Purlins Terminology

Pavers now this term is really confusing because even in the industry it means different things.

Wood porch roof purlins terminology.

Purlins are non pressure treated 1 x 4 x 12 lumber that is installed on to the roof in a specific layout pattern and screw pattern. When we say pavers we are really talking about the method of installation of a particular type of masonry product. Patio masonry structure without a roof. The purlins of a roof support the weight of the roof deck.

One of a series of sloped structural members that extend from the ridge or hip to the downslope perimeter or eave designed to support the roof deck and its associated loads. They run the perpendicular to the rafters and are typically made with 2 x 2 or 1 x 2 lumber. We do recommend it however. These vertical frame members are used in a truss configured with two symmetrical posts instead of or in addition to a single king post.

These are optional smaller pieces of wood that can be placed on top of the rafters for additional shade. Roof framing terms are related to the parts of a triangle. Do all roofing projects require purlins. An l shaped metal strip positioned along a roof s edges to allow water to run off the roof without running down the eaves or siding.

The roof deck is the wood panel ply board or metal sheeting that creates the surface of the roof. Framing terms knowing the basic vocabulary is a necessary part of your work as a builder. In the following section we ll cover some of the more common roof and rafter terms you ll need. Deck wooden structure could be wood framing with composite decking without a roof.

A roof that has two pitches on each slope. Eaves on a sloped roof the horizontal underside that projects out from the house wall. When made of wood it is usually covered with some sort of weatherproofing and sometimes an insulation material. Horizontal secondary structural member that transfers loads from the primary structural framing.

The upper sections of timber frame bents are often connected and reinforced horizontally by purlins which also support the roof deck. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to.