This document proposes a private standard for the dimensions of a special cast iron manhole cover for vehicular areas. The standard would specify the main dimensions for a manhole cover that is 32.50 inches in diameter, with a round opening. It describes the overall diameter, top opening diameter, top frame diameter, inner opening diameter, clearance, and locations for vent holes. The proposed private standard is intended to align with regional standards like EN124, and would be useful for manhole covers used in outdoor networks for water, sewage, or storm water in vehicular areas.

1. A PROPOSAL ON THE SUBJECT OF PRIVATE STANDARDIZATION
THE SUBJECT OF PRIVATE STANDARD DEVELOPMENT
Date of proposal:
Secretariat of Organization
TCs
WGs
Author of proposal:
THE PROPOSAL
Title of proposal:
"Dimensions of special product of vehicular area manhole cover, of round opening, of cast
iron construction, size DN.825mm or 32.50in (D.822/828), and 360 or 400 kN loading class."
Material: - ductile iron - of grade to fit the loading class in compliance with thicknesses of pieces.
The document proposal comes to settle up a dimensional based private standard document
(as case, a publication / deliverable) concerning the dimensions of special product of a street
manhole cover - which may be in concordance with requirements of one or more regional
basic standard(s) of cast/ductile iron manhole covers, - e.g. the regional CEN standard
"EN124 - Gully tops and manhole tops for vehicular and pedestrian areas. Design
requirements, type testing, marking, quality control", - or, with other basic standard
concerning street or residential area, manhole covers - as long as the basic standard (e.g. as
the EN124 is) does not apply for dimensions of special products of manhole covers.
As conclusion, the proposed private standard document (norm) aims to specify the main
dimensions for a special product of a cast iron vehicular area manhole cover of DN.825mm /
32.50in, of round opening; - and must, as case may be, completed with other standards which
refers to testing, marking, quality control. (e.g. the EN124 CEN standard).
Short description of design related to product and main dimensions:
> Round (circular) frame with round opening;
- overall dia. of lid piece: 822*;825**mm (32.375*; 32.50**in),
- top opening of frame: dia. 825*;828**mm (32.50*; 32.625**in), - round,
- top dia. of frame: 875mm (34.4375in), - round
- inner opening of base of frame - dia. 915 or 1000mm (36.00, or 39.375in),
to fit a 800mm (32.50in), 36in (915mm), 1000mm dia. of manhole top opening.
- clearance (clear opening) of frame, - about 770mm (~30.3125in),
- 4 vent/key holes of about 40 sq.cm. (~6.20sq.in) at all clear opening;
> which also allows an easy opening using common tools,
- optional, blocks for locking system fixing may be added, - on backside of lid piece.
The product which the subject of standardization consists in, may be useful as outdoor
networks, water supply, as well sewerage chambers or storm water, - in vehicular areas.
The type of public standard document, as we consider the proposal may later transform into:
> concerning the therminology of EN45020:2006 description: - prestandard (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).
> concerning the therminology of ISO/CEI-2:2004: - international standard (3.3), technical
specification (3.4), technical report (3.5), publicly available specification (3.7).