The ‘fit only’ option for the installation of a Spiral Cellar has a number of critical elements that must be executed as per our specification. These elements will be checked ahead of our attendance. Any variances will become chargeable.
The elements are:
Excavation
Support System
Ventilation Pipes
Electrical Supply
Finished Floor Level Datum
Project Management
Safety
The contractor should excavate a hole as per the structural calculations package, on average 2,150-2,550mm diameter and up to 3600mm deep (depending upon cellar size selected – the exact dimensions would be confirmed by Spiral Cellars once the engineering calculations have been prepared, which are project specific). Any larger excavation will result in additional backfill and hence incur additional costs to the client/contractor.
The hole should be protected with our steel shuttering panel earth support system - a set of steel shuttering rings. These will be delivered to site at one week’s notice, prior to the excavation date. All bolts, washers and nuts are supplied. Follow our ‘Guidelines for Contractors – hole preparation’ spec sheet.
Once the excavation is complete and made safe, it is critical that the preparation for the vent pipes is given consideration. 2 x 50mm internal diameter UPVC pipe with solvent welds must be installed in line with Spiral Cellar’s designs. Where possible 90 degree bends must be minimised. At the external end the 50mm pipes can be terminated 100mm beyond the brickwork if they are contained within the cavity. If the vents are to be outside the external wall, the 2 x 50mm pipes can be terminated side by side and protected. The low level ‘cold – in’ pipe will be 300mm above hard landscape, the high level ‘warm – out’ pipe will be at 2000mm height, unless agreed differently at survey stage. All pipe ends to be taped up. Vents to be marked ‘upper’ & ‘lower’. Follow our ‘General Guidelines for Contractors’ spec sheet. Please note, the vent pipes must not have hot water pipes for radiators or under floor heating set over. The vent pipe run must be executed as per our specification.
The cellar requires a power supply for lighting and for the motorised door (if applicable). An electrical feed to the cellar will need to be installed within the floor construction in conduit with no junctions. Leave approximately 3.5m of cable within the cellar. Tape ends. Provide a 3amp fused spur for cellar supply and to make final connections outside the cellar. Follow our ‘General Guidelines for Contractors’ spec sheet.
A datum level mark on a wall or similar indicating Finished Floor Level (FFL) is to be provided within 3m of the cellar location on DAY 1 of our installation. – this cannot be changed thereafter.
The Project Manager will be in touch in the run up to the installation to agree a suitable start date for the installation and answer any queries that may arise. A pre-installation visit may be conducted to confirm the site and excavation are ready for our team’s arrival. We will expect to be able to arrive at the site on the agreed date, remove the protection and fit the cellar, reinforce concrete ring (if required), make final connections to the ventilation pipes and then finally fit the trap door. Any delays/incomplete works which cause the project to run beyond the scheduled programme will be charged in accordance with our terms and conditions. If there are any doubts concerning the installation procedure and requirements the contractor should contact the main office for direct referral to our Project Manager for technical guidance, or to arrange a site meeting.
We will expect good, clear, safe site access and an area for materials in line with the discussions and agreements at site survey stage. The HSE does not consider other teams working overhead or obstructing scaffold to be a safe working environment.
Watch an installation video