Alpine

47 SYSTEM 42 – A truss (usually a flat truss) where the 2x4 members have been rotated 90 degrees onto their sides, resulting in a truss that is 3 _" wide instead of 1 _" wide. These trusses are usually used floor systems, but can be provided as roof trusses because you can achieve shallow depth trusses when you utilize System 42s. These trusses can sometimes be manufactured using 3x2 lumber instead of 4x2 lumber. TEMPORARY BRACING – Bracing added to the roof or floor system to brace it during erection and installation. TOP CHORD - An inclined or horizontal member that establishes the upper edge of a truss, usually carrying combined compression and bending stresses. TOP CHORD BEARING – Any time the bearing rests directly under the top chord of the truss. The image on the right is also often referred to a "tail bearing" truss. TRUSS - A manufactured component that functions as a structural support member. A truss employs one or more triangles in its construction. VALLEY SET - Trusses built to change the look of the roof system, which sit in a perpendicular direction on top of other trusses. VIBRATION - The term associated with the serviceability of a floor. If the occupant feels the floor respond to walking or other input, it may be referred to as vibration or response to load. WEBS - Members that join the top and bottom chords to form the triangular patterns that give truss action, usually carrying tension or compression stresses (no bending).

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