What does a dragon tie do?
But what does a dragon tie do? It prevents the wall plate from spreading where the load transferred down the roof is at its greatest. The extra weight caused the wall plate to be pushed out, usually together with the top three courses of masonry, as the roof started to spread with the additional weight.
What is a diagonal beam called?
Dragon beam is a horizontal, diagonal beam in the corner(s) of some traditional timber framed buildings. The term is commonly used in both hip roof framing and jettying. In French it is called a coyer or enrayure.
What is a rafter in construction?
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 shingles, roof deck and its associated loads. A pair of rafters is called a couple.
What is drag beam?
noun. (in a hipped roof) a short beam holding the foot of a hip rafter to counteract its thrust. Also called dragging beam, dragon beam, dragon piece.
What is a roof plane brace?
Roof area is the actual plan area of the roof and includes overhangs. 6. A hip or valley rafter running continuously from ridge to top plate can be classed as one roof plane brace.
What is lateral load?
Lateral loading is the continuous and repeated application of a load on an object or structural component in a horizontal direction or parallel to the x-axis. Lateral loading can cause a material to shear or bend in the direction of the force and ultimately lead to the failure of the material.
What is Batten in roof?
Battens are the lengths of wood that are laid in-between the rafters to secure the roofing felt and to accept the tiles or slates when they are fitted. They are used to locate the roof covering in straight, consistent rows, and provide a strong anchor for the nails or clips used to secure the tiles or slates.
What is a creeper rafter?
Hip rafter – a rafter following the line of the external intersection of two roof surfaces. Hip creeper rafter – a rafter connecting a wall plate and hip. Jack rafter – a rafter that fits against the end of a ridge at the intersection of two hips.
What is a king rafter?
King rafter: On the side of a hip roof, a king rafter is the longest and is in line with the ridge. Valley rafter: The main rafter that is found at the lowest point of a valley roof. Jack rafter: A rafter that is shortened by landing on a hip rafter or being interrupted by a dormer window.
