![]() ![]() Headers carry the weight of the structure above and transfer it to the trimmers down to the floors and foundations below. Calculating and know the size of the header depends on what the header needs to support. The header is usually made out of dimensional lumber or LVL installed on its edge. Doors in a load-bearing wall that holds the weight of the house, created by beams and trusses, need a larger header than those in non-load-bearing walls. The header for a window & door is seems like a bridge that transferring the weight above it to the floor and foundation below. The header helps to provide support, stability and strength to the top and side sections of the door frame. It runs between full length supports and along its length and carry the load of shorter studs, joists or rafter that terminate at the opening. It is often made of two joists, rafter or studs. Typically header is provided at least twice size then any other surrounding members such as rafter purlin and stud. LVL header provide structural support in wood frame construction. ![]() LVL beam depth are typically 5 1/2 inches (140mm), 7 1/4 inches (184mm), 9 1/4 inches (235mm), 9 1/2 inches (241mm), 11 1/4 inches (286mm), 11 7/8 inches (302mm), 14 inches (356mm), 16 inches (406mm), 18 inches (457mm), 18 3/4 inches (476mm), 20 inches (508mm) and 23 7/8 inches (606mm).Ī header is a horizontal beam generally made of timber or Laminated veneer lumber or LVL that provided along the opening in full length for doorway, window, skylight or stairway. More than 60 Feet there is difficulty in transportation and handling. It can be customised according to your requirement. LVL length are generally available in 24, 28, 32, 36, 40 and 44 feet with special order upto 60 Feet. It is available in thickness from 19mm (3/4 inches) to 178mm (7 inches). LVL sizes may vary according to manufacturer but lvl standard thickness are 1 3/4 inches to 7 inches. LVL offer several advantages over technical milled lumber, it is made in factory under control specification and it is more stronger straighter and more uniform in size. LVL has a “maximum allowable bending stress” of 2,800 or 3,000 psi. Because of the wood’s dimensional stability, inspection times are often reduced, too. Use an LVL beam to eliminate twisting and splitting for quiet floors. LVL is a straight, enough strong wood that fights warping and shrinking, providing great stability for your projects. LVL is product of recent innovation they are result of new technology and economic pressure to make use of new wood species and smaller trees that cannot be used to make solid Lumber. ![]() The American wood Council National design specification for wood, lvl is type of structural composite lumber comparable to glued laminated timber (glulam). The most common thickness of Laminated veneer lumber or LVL of 1 ply is 45 mm or 1-3/4 inches, from which wider header can be easily constructed by fastening multiple LVL plies together on site. Laminated veneer lumber or LVL are available in 1 ply of thickness 1 -3/4″ (1.75″), 2 ply lvl of thickness 3 -1/2″ (3.5″), 3 ply lvl of thickness 5 -1/4″ (5.25″) and 4 ply lvl of thickness 7 inches wide. ![]()
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