Installation Guide: For new build with permanent 1st fix of BS EN124 Ironwork
Installation Guide for Cast Ductile Iron BS EN124 Access Cover assemblies used in new build applications when using a permanent 1st fix (at reduced levels) to concrete slab or engineering brick-top chambers.
General note: This installation method anticipates the use of Wrekin ClickLift assemblies for raising of ironwork from an initial reduced level installation position (See Installation Guide No.2 for raising of ironwork from a reduced level but not involving the use of ClickLift assemblies)
General
The following installation guidance document refers to permanent, sequential-installation of new Wrekin BS EN 124 ClickLift ironwork products and materials, initially at reduced levels flush with the surrounding construction-phase [Binder] surfacing, followed at a later date by fitment of the final ClickLift component flush with finish surfacing levels. The ClickLift apparatus is therefore supplied in two separate parts, comprising: A main frame and cover assembly (as a manhole cover and frame) and a separate frame raising component.
The installation’s permanent construction is intended to comply, as appropriate, with; DMRB CD534 (or HA104/09) MCHW, SfA (The Code), UK Water Industry CP373a/P8669 WRc Inspectors Guide to Ironwork, RSTA CoP and/or FACTA Standards. In the case of any conflicting requirements, the Standard or Client Specification relevant to the product material and size will prevail.
This installation guide assumes that the new chamber support structure is of adequate condition and strength to suit the intended load class of the ironwork being installed.
All site operatives responsible for installation shall have experience of or familiarise themselves with the type of products & materials being installed and shall ensure the necessary PPE is used. Where any uncertainty exists, consult Wrekin for advice. (01543 440440 or www.wrekinproducts.com).
In all cases, precautions should be taken to prevent operatives from deliberately or accidentally exchanging cover/grating elements between product assemblies. Similarly, covers or gratings removed from their frames should always be placed back in the same orientation in their original frames in order to prevent mal operation during trafficking.
Where the use of a bedding mortar is referred to, it is intended to reflect the use of a high-performance, Polyester-Resin material used as the primary, frame-flange encapsulation and bedding mortar. E.g. Wrekin Unipak bedding mortar.
Where the use of ‘adjustment units’ are referred to, it is intended to reflect the use of MCHW-compliant, proprietary, high-performance, foundation-sympathetic components. E.g. Wrekin’s UniPak adjustment units.
When dealing with heavy ironwork, it is recommended operatives use mechanical lifting devices wherever possible in order to minimise manual handling.
To ensure large cover and frame assemblies are not damaged or over-stressed during lifting, use all the frame lifting features provided, equally.