EWPAA Structural Plywood and LVL Design Manual - Engineered ...

For a beam that is loaded along its compression edge and has a continuous lateral restraint system alongthe compression edge (see FIGURE A6.2), then the slenderness co-efficient, denoted by S 1 , may be taken tobe equal to zero.FIGURE A6.2: Continuous restraint along the compression and tension edgeFor a beam loaded along its tension edge and which has a continuous lateral restraint system along thetension edge (see FIGURE A6.2), the slenderness co-efficient, denoted by S 1 , may be taken to be –dS 1 = 2.25bFor a beam loaded along its tension edge, which in addition to having a continuous lateral restraintsystem along its tension edge, has equally spaced torsional restraints at points L aΦ apart, indicated inFIGURE A6.3, to prevent rotation about the beams Z axis, the slenderness co-efficient, denoted by S 1 , maybe taken to be –S11.5 d/b=0.5⎡ 2 ⎤⎢⎛ d ⎞⎜ π ⎟ + 0.4⎥⎢⎜L⎥aφ⎟⎢⎣⎝ ⎠ ⎥⎦50