![]() ![]() Typically, it runs from the ridge or hip of the roof. Rafter size for 10, 12, 15, 16, 18, 20 & 24 foot spanĪ rafter is a structural component that is used as part of a roof construction. In US, most wood rafters have maximum length of 20 feet. Rafters are usually made of pine or cedar tree, for longer span rafters, building materials several manufacturers have created Laminated veneer lumber (LVL) rafters that can be 2–5 times longer than typical wood rafter. Many species of wood are used to provide timber which have much strength. In many countries such as in US, Canada United Kingdom roof rafter made of wood/ timber are much common to build a house. Rafters are generally provide in series, side by side, providing a plateform to support roof decks and roof coverings. Rafter runs from the ridge or hip of the roof to the wall plate of the external wall.
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