Frost Brochure Issue 03 - Catalog - Page 70
Roof Drainage - Design Considerations
MATERIALS AND APPEARANCE
ACCESSORIES AND VARIATIONS
Strength, corrosion resistance and
discreet appearance are important
considerations when making roof
outlet selections.
For areas such as balconies or roof
terraces products are available in
nickel bronze, ductile iron, stainless
steel or aluminium materials. Drains
located in pedestrian surfaces or
access routes must be disabled
compliant.
Standard optional items are available
such as 昀椀lter buckets to intercept
debris, gravel guards, bearing pans to
spread roof loadings and underdeck
clamps to secure outlet bodies.
WEIGHT BEARING AND LOAD
RATING
As an integral part of the roof it is vital
gratings and assemblies withstand
all anticipated loads. This catalogue
shows the load rating class for each
grating, cover or gully assembly to
BS EN 1253, as follows:
Loading K3 (Pedestrian Only)Areas for
foot tra昀昀ic only, such as washrooms,
shower areas, hotels, schools,
museums, retail centres, swimming
baths, leisure centres, balconies,
terraces and roof gardens.
Loading L15 (Light Industrial)
Areas with light vehicular tra昀昀ic such
as cycle ways and domestic drives.
Loading M125 (Heavy Industrial)
Areas with vehicular tra昀昀ic, such as
car parks, factories, warehouses and
workshops.
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INTERNATIONAL STANDARDS
Satin Nickel Bronze and Polished
Nickel Bronze to BS1400.
Stainless Steel to BS EN 10088-1:2005
Grade 1.4301 (304) or Grade 1.4401
(316) if speci昀椀ed.
Ductile Iron to BS EN 1563 & 1564 Cast
with the ductility of steel and more
than doubling the tensile strength of
cast iron.
Aluminium LM 6 to BS EN 1559-4: 1999.
