An additional load centered at a given point. An example is a crane or hoist hanging from the bottom chord at a panel or mechanical equipment supported by the top chord. The shorter the duration of the load, the higher the percent increase in allowable stress. HEEL - Point on a truss at which the top and bottom chords intersect. LIVE LOAD - Any load which is not of permanent nature, such as snow, wind, movable concentrated loads, furniture, etc.
Live loads are generally of short duration.
The extension of the top chord of a truss beyond the bearing support. The chord segment defined by two successive joints. The centerline distance between joints measured along the chords. PEAK - Point on a truss where the sloped top chords meet. Also one fourth the distance between two joints from either joint.