Intermediate structural support is required to resist applied pressure loads for dampers that consist of two or more sections in both height and width. (See below.)
Tubular steel structural support may be required for large multi-sectioned dampers.
MAXIMUM DEFLECTION:
The structure providing intermediate support must be designed to resist the highest pressure load, with deflection of less than L/230. This applies whether the pressure load is created by the mechanical system, or by wind load, or if the damper is mounted on the exterior of the building.
