Roof truss parts explained.
Roof support member.
A waterproofing seal installed along the roof s valley line with taktekkernbergen no.
Decks typically are designed to support 55 pounds per square feet or psf of weight.
If the roof is attached to the deck it needs to be able to support the weight.
If the deck doubles as a porch it needs to be able to support no more than 80 psf.
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.
A great deal depends on the pitch of the roof.
Lacking a tie beam the arch braced arched brace truss gives a more open look to the interior of the roof.
Slope a roof s slope is the number of inches it rises for every 12 inches of horizontal run a roof with a 4 in 12 slope rises 4 inches for every 12 inches of horizontal run.
Once again a 2 by 4 inch piece of lumber is placed between the trusses and parallel to the ceiling joists.
Plywood or oriented strand board form the roof deck also called the sheeting or sheathing to support the roof covering.
Collar ties rafter ties tension beams structural ridge beams.
This is where a high pitched roof is necessary.
Domestic roof construction is the framing and roof covering which is.
A top plate is nailed to the top of wall studs.
Strutting beams should only support roof loads and not be used as ceiling joists.
They transfer the load of the roof to load bearing walls.
The same roof has a 4 12 or 1 3 pitch.
Porch decks also require larger footings than deck footings.
Some of these can support the roof and prevent ridge sagging and wall spreading.
A measurement of roof area that equals 100 square feet an area 10 feet by 10 feet.
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.
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.
Where necessary struts shall be provided to support roof members such as underpurlins ridgeboards and hip and valley rafters.
Heavier under purlins or purlin plates.
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 higher pitched roof would be better for extra living space than a lower pitched roof.
A waterproofing layer that protects the roof valleys from leaking.
Strutting beams support the roof members where there are no load bearing wall studs available.
