Lion06
Structural
- Nov 17, 2006
- 4,238
This is tangential to the recent thread on composite action. The green book uses an Ieff for deflection checks (which accounts for partial composite action). The new black book calls this same equation Iequ and recommends multiplying this by 0.75 for deflection (based on testing). RAM did not recognize this. I called them last week and they were unaware of this change, but will incorporate it into the next version. In the meantime, anyone using RAM should bump up the deflection criteria for composite beams to account for this (e.g. L/360 will want to be L/480).