Frost Brochure Issue 03 - Catalog - Page 70
Cold Roof Assemblies - Flat Gratings
Rain water outlets suited to cold roof
construction where the waterproof
membrane is located on top of the roof
deck (diagram page 65). Body and
clamp: Cast iron. Grating: Ductile iron.
Area drained: Based on a head of
35mm and rainfall intensity of 75mm
per hour. For details of accessories
please see pages 84-88.
Note 1 - smaller outlet sizes 2” & 3”
available for threaded outlets.
Frost roof drain flat grating with medium sump body and threaded outlet
See Note 1
70
Part Number
Outlet Size
Deck Opening
(mm)
Area Drained
(sq.m)
33.0014
£81.40
BSP 4
240
290