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DROP TRUSS

A Truss designed to carry the same loading as other similar Trusses in a given structure, that is built to a given dimension shorter in overall height than the other Trusses in that run, designed to facilitate a double layer of roofing or other covering on the roof, while maintaining the same roof height throughout.

FASCIA

The flat surface located at the outer end of a roof overhang or cantilever end

FEATHER CUT

A heel cut which has been made with a zero butt cut (a sawn member with a feathered edge).

FLOOR/FLAT TRUSS

An engineered component shaped so as to be nearly rectangular. See the definition for TRUSS and ROOF TRUSS.

GABLE END FRAME TRUSS

A component manufactured to the profile of the mating Truss having vertical "in-plane" members fastened to the chords instead of diagonal web members. It is not a structural Truss and requires continuous support by a bearing wall or other load bearing element such as a beam along the bottom chord.

GABLE

The portion of the roof above the eave line of a double sloped (triangle shaped) roof.

GAMBREL

A roof having two slopes on each side, the lower slope usually steeper than the upper.

GIRDER 

A beam of wood or steel used as the principal support of concentrated loads at points along its span.

GIRDER TRUSS

A Truss designed and engineered to carry heavy loads transmitted from other structural members bearing upon it. Often a multiple ply Truss.

HANGER

A mechanical device for securing two or more Trusses, components, pieces, parts, or members together, including anchors, buckets, straps, wall ties, and fasteners.

HEADER

A conventionally framed wood girder located between stud, jack, tee, joist, rafter, or Truss openings.

HEEL JOINT

The point on a Truss where the top and bottom chords intersect.

HIP MASTER

Hip girder Truss designed to carry prefabricated roof jacks or common framing and hip corners.

HIP TRUSS

A component of a hip roof system of roof Trusses affording symmetry of architectural appearance. The eave line extends to the same level around all sides of the building eliminating the use of gable ends. Normally the off site manufacture of hip Truss parts aids in speed and quality of field construction.

HURRICANE STRAP or CLIP

Galvanized steel or stainless steel brackets, or thin metal strips used to strengthen “wood to wood” or “wood to concrete” connections. These straps may also be referred to as “hurricane clips.”

INTERIOR BEARING

Term used to describe supports which are interior to two exterior supports.

JOIST

A horizontal roof or floor framing member.

LATERAL BRACING

Members placed and connected at right angles to a chord or web member of a Truss.

LEVEL RETURN

A Lumber filler placed horizontally from the end of an overhang tail returning back to the outside wall, to form a soffit that is level with the ground.

MITER CUT

A single cut made at an angle to the length of a member. 

MOMENT

A force that produces rotation of a member and commensurate bending stresses.

MPCWT

 - Metal Plate Connected Wood Truss

One of the methods used to fasten one or more members of of a Truss to others.

MSR - Machine Stress Rated

Lumber that is graded for strength by testing equipment as opposed to visually inspected and rated. 

NAILER (Scab)

A member fastened to another member by nails for reinforcement.