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BS EN124
Manhole Covers
Gully Gratings
Channel Grate

U.S.A. CANADA
Manhole Rings & Cover
Valve Box, Meter Box

Industrial, Agricultural
Electrical Castings

Ornamental And Decorative Castings

SPECIFICATIONS STANDARDS

BS EN124

ASTM A48 Class35B

Certification

CONTACT

STANDARD And SPECIFICATION FOR
THE U.S. MUNICIPAL CONSTRUCTION CASTINGS

MATERIAL: Grey Iron castings shall conform to ASTM A48-93 Class 35B, AASHTO M105, and/or AASHTO-M306 unless otherwise specified.  ASTM A536-84 is for Ductile Iron Castings.  Castings shall conform to ASTM A48 Class  30B or ASTM A 536.

Castings supply will be free from pouring faults, sponginess, cracks, blow-holes, and other defects.  Bearing surfaces shall be machined, if necessary, so that the grates and covers sit firmly on the frames without rocking.  All surfaces shall be painted with one shop coat of asphalt or at base black paint having a minimum softening point of 71 degree centigrade.  All joints and crevices shall be thoroughly coated.

TOLERANCES: As cast dimensions may vary by ± 1/16 inch per foot in critical areas relating to fit, load bearing capacity and drainage openings.   Dimension Tolerances :
a)  300 mm or less +/- 3 mm
b)  Up to and including 900 mm +/- 6mm
Non-critical dimensions may be modified to facilitate proper casting techniques, performance and value, without notice. Notwithstanding these tolerances, all rings, covers, frames, grates and curb hoods of the same nominal size are interchangeable.

WEIGHTS: Although casting weights shall be within ± 5% of the specified weight and/or as shown on customer drawing.

PAINT: Castings are supplied unpainted as a standard, unless specified.
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CAST IRON LOAD RATING

All castings to have load tested in accordance with the destructive testing protocol below, and are assigned one of the following four load rating designations:

• Non-Traffic: These castings are intended for areas such as sidewalks, terraces and other areas not subject to vehicular traffic loads.

• Medium Duty: Castings bearing this designation are able to withstand occasional vehicular loading, but are not intended to receive heavy highway traffic. Applications include driveways, parking lots, and ramps.

• Heavy Duty: These castings are manufactured to withstand highway traffic loads, exceeding AASHTO H-20/HS-20 specifications (wheel loads of 16,000 pounds with a tire contact area of 10” x 20”) 25,000 pounds proof load in accordance with CID A-A 60005 or 40,000 pounds proof
load per AASHTO M-306.

QUALITY ASSURANCE