DN650 Composite Manhole Cover 125kN

A proposal on the subject of private standardization

THE SUBJECT OF STANDARDIZATION

THE PROPOSAL - Title of proposal:
Dimensions of special product of Outdoor Manhole Cover, of composite construction, of size D650/655, B125 (125kN) loading class.
Proposed material: - fiberglass, fiber reinforced composite (FRC), kevlar layer; GRP / FRP / Composite; SMC composite, a.o.

The proposal comes to establish a standardization subject publication/deliverable concerning dimensions of special products of manhole covers - which may be in concordance with requirement of the EN124 Gully tops and manhole tops for vehicular and pedestrian areas. Design requirements, type testing, marking, quality control, or other basic standard concerning outdoor, street or residential area, manhole covers - as long as the basic standard does not apply for dimensions of special products of manhole covers. (eg.EN124).

The proposed document (norm) aims to specify the main dimmensions for special product of Composite Manhole Cover of D650/655.

Description of design and dimensional aspects:
> Square frame with round opening;
- top side of frame: 767 mm - square,
- top opening of frame: dia. 655 mm - round,
- inner opening of base of frame - 767x767mm - to fit an 750x750mm manhole top opening
- clearance of frame, - about 600 mm,
- optional, - thermal insulation for lid and frame.
- central round key-hole of about 1.5 sq.cm. (easy opening with common tools).

The product which the subject of standardization consists in, may be useful as outdoor watermeter or water supply chambers.

Type of standard, (as we consider the proposal, - as EN45020:2006 description);
> pre-standard (3.3), product standard (5.4), technical specification (3.4), unilaterally aligned standard (6.8), - all of these aligned (related) to the EN124 CEN standard which is a basic standard (5.1).