25 October 2004
Figure 3-1. Delagging facility floor plan.
DESIGN CRITERIA. Design the facility using general technical
requirements in Chapter 2 of this UFC and the specific requirements in this Chapter.
EXHAUST AIR. Design the exhaust air system
capture velocity of 0.762 m/s (150 fpm) to capture all the contaminants at the source.
Hood Design. Design asbestos delagging hood to enclose the work
piece as much as possible. Do not use small portable hoods with flexible ductwork
because they do not provide consistent capture.
Typical Hood Design for High Profile Work Pieces. Figure 3-2 shows a
hood design consisting of a workbench with a central, circular area. Mount the circular
area on sealed bearings to allow easy turning of heavy work pieces. This design is best
for high profile work pieces (for example, boilers, pumps). The hood captures
Two cleanout doors on the front and two doors on the sides of the hood
for easy access to asbestos debris. Provide two small cutouts in the outer