RAISED
ACCESS FLOORS
250
ENVIRONMENTAL CONDITIONS
Ø
Areas for storage and installation must be clean,
dry, ventilated and free from both excessive or rapid variations
of temperature and humidity.
Ø
Subfloor temperatures must be maintained above 5ºC.
280
DUSTPROOFING
Ø
Ensure that surfaces to be sealed are clean, dry
and free from dust, grease and other contaminants.
Ø
Apply two coats of tinted sealer, recommended by
the raised access floor manufacturer, to all concrete and
masonry surfaces within the floor void to prevent dusting
throughout the life of the installation.
310
WORKMANSHIP GENERALLY
Ø
Store and install floor components in dry, well ventilated
conditions not subject to extremes of temperature of humidity.
Ø
Ensure that the subfloor is clean before installation
commences and that cleanliness is maintained throughout
the installation.
Ø
Install the floor, accessories, finishes, etc., to
achieve specified levels of performance.
Ø
The completed installation to be level, stable, firm
and free from bounce, squeaks, vibration and lipping between
panels.
Ø
Adequately protect from dirt, stains, damage and
overloading until Practical Completion.
320
PEDESTAL STRUCTURE AND FIXING TESTS
Ø
Test pedestals to MOB PF2 PS/SPU, test T42.00 to
prove the need or otherwise for mechanically fixing to the
subfloor and for site quality control.
Tests to be carried out in the presence of the CA.
Ø
Where an adhesive fixing fails as a result of subfloor
failure, arrange for the Main Contractor to make good the
subfloor. Re-fix
using mechanical fixings and re-test.
Ø
If any pedestal structure fails, replace the pedestal
and re-test.
330
SETTING OUT
Ø
Where not shown otherwise, set out floor system to
ensure that cut panels are not less than half in width,
particularly at doorways, thresholds, etc.
340
SEALING OF CUT PANELS
Ø
Seal all exposed cut edges of panels which incorporate
moisture sensitive or combustible cores with Class 0 rated
aluminium foil self-adhesive tape.
350
PERIMETERS
Ø
Ensure that the installed system has sufficient lateral
stability to enable it to be independent of abutting elements.
Ø
Provide a 10mm expansion gap at all abutments and
fill with a resilient closed cell filler before fixing skirtings,
cover strips, etc.
360
CAVITY BARRIERS
Ø
Material: PVC
sleeved mineral wool.
Fire
resistance to BS 476 Part 20.
Integrity
/ insulation (minutes):
30 minutes.
Ø
Unless shown otherwise, install barriers to subdivide
floor void into areas not exceeding 20m square.
Ø
Fix securely to subfloor, at joints and as necessary
to ensure permanent stability and continuity with no gaps,
to provide an effective barrier to smoke and flame.
Ø
Seal any gaps at junctions of cavity barriers with
floor panels, walls, ducts, pipes, cable trays, etc., with
mineral wool or other suitable material to prevent penetration
of smoke and flame.
Ø
Access panels above cavity barriers to be screwed
down or otherwise firmly secured.
390
ELECTRICAL CONTINUITY AND EARTH BONDING
Ø
All substantial metal parts of the floor to be electrically
continuous and fully earth bonded in accordance with BS
7671 (The IEE Wiring Regulations).
Ø
Liaise with the electrical subcontractor to agree
the number and location of earth bonding connection points.
Supply connectors as necessary for use by the electrical
subcontractor.
400
TESTING ELECTRICAL RESISTANCE
Ø
Arrange for a qualified electrician to test the floor
to verify compliance with MOB PF2/SPU, clause P9.01.
Notify the CA to enable him to witness the testing.
Submit a test report to the CA.
410
PROTECTION
Ø
Ensure that no part of the floor installation is:
Ø
Used as a platform for storage of equipment and materials.
Ø
Subjected to static or dynamic loads which exceed
those for which it is designed.
Adequate precautions, including the use of spreader
plates, must be taken during installation of equipment and
any work on other elements e.g:
ceilings.
Ø
Walked on within 48 hours following the use of adhesives
to fix pedestals to the subfloor.
Ø
Left unprotected prior to Practical Completion.
420
PANEL LIFTING DEVICES
Ø
Provide Main Contractor with two sets of lifting
devices suitable for each of the floor finishes installed.
One set to be for the use of subcontractors requiring
access to the void and the other for handing over to the
CA at Practical Completion.
430
USER INSTRUCTIONS
Ø
Provide the Main Contractor with two copies of the
floor manufacturer's maintenance and user instructions.
One copy to be for the use of subcontractors requiring
access to the void and the other for handing over to the
CA at Practical Completion.
The contents of the instructions to include:
Ø
The correct method for lifting and replacing panels
including limitations on the sequence and number of panels
which can be removed at one time.
Ø
The permissible loadings that can be applied to the
floor, with guidance on the use of spreader plates, etc.,
during the installation of equipment and subsequent maintenance.
Ø
Methods for installing cabling, ducts, etc., so as
to prevent damage to the supporting structure.
Ø
Cleaning methods for the panels and any integral
finish(es).
450
POST INSTALLATION VISIT
Ø
After completion of services and other associated
work:
Ø
Thoroughly inspect the floor installation for defects.
Prepare a schedule of outstanding defects and submit
a copy to the CA.
|
