Roof Support Member

A great deal depends on the pitch of the roof.

Roof support member.

They transfer the load of the roof to load bearing walls. A top plate is nailed to the top of wall studs. The principal rafters are linked by a collar beam supported by a pair of arch braces which stiffen the structure and help to transmit the weight of the roof down through the principal rafters to the supporting wall. A pair of rafters is called a couple.

The tops of inclined rafters are fastened to the ridge. Plywood or oriented strand board form the roof deck also called the sheeting or sheathing to support the roof covering. Strutting beams should only support roof loads and not be used as ceiling joists. A waterproofing layer that protects the roof valleys from leaking.

The united states still uses imperial units of measurement and framing members are typically spaced. Strutting beams support the roof members where there are no load bearing wall studs available. The other is just used to support the trusses. A rafter is one of a series of sloped structural members such as wooden beams that extend from the ridge or hip to the wall plate downslope perimeter or eave and that are designed to support the roof deck and its associated loads.

Horizontal beams supported by posts and used to support the mid span of rafters to cover longer spans these are used in large buildings like the traditional large old barns in the us. Domestic roof construction is the framing and roof covering which is. Rafters rafters make up the main framework of all roofs. In home construction rafters are normally made of wood.

This is where a high pitched roof is necessary. A higher pitched roof would be better for extra living space than a lower pitched roof. Roof truss parts explained. This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams.

Once again a 2 by 4 inch piece of lumber is placed between the trusses and parallel to the ceiling joists. Heavier under purlins or purlin plates. Some of these can support the roof and prevent ridge sagging and wall spreading. They are inclined members spaced from 16 to 48 inches apart.

When framing a roof figure 7 2 carpenters must be familiar with commonly used roofing terms figures 7 3 and 7 4. Lacking a tie beam the arch braced arched brace truss gives a more open look to the interior of the roof. They vary in size depending on length and spacing. One of a series of diagonal members of the truss that meet at the apex in order to support the roof deck and its loads.