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Series 25 Thermally Broken Door System
Specification
The HWA Series 25 Thermally Broken 5-20D Door System has been
designed to offer the specifier the advantages of polyamide thermal break
technology in meeting the latest thermal requirements of the current
building regulations.
Introduction
The 5-20D Door System makes use of the
standard System 5-20 outer frames
together with the standard mullion and
transom options. Included in the basic
suite of profiles are drip rails to divert
driving rain. Various other profiles can be
designed and incorporated allowing
architects to achieve flexible designs. The
system is glazed internally and
accommodates 28mm double glazing.
As with all HWA systems, the
5-20D Door System is manufactured to
exacting standards enabling economy to be
combined with strength to give many years
of aesthetic, trouble-free operation.
Thermal Performance
The HWA Series 25 5-20D Door System,
in conjunction with the correct glass
specification, is designed to aid compliance
with the latest thermal requiremens of the
current building regulations.
Materials
Aluminum profiles are extruded from
aluminium alloy 6060T6, T5 or T4
complying with the recommendations of
BS EN 12020-2:2001/BS EN 755-9;2001.
Polyamide thermal breaks are produced
from glass reinforced nylon sections
designed to withstand temperatures in
excess of 200°C, allowing the sections to
be powder coated after thermal breaking.
Finishes
The range of sections can be provided in
either of the following range of finishes;
1. Anodised to BS1615 or BS3987
2. Powder organic coated to BS6496
The System 5-20D door can accommodate
a different colour/finish internally to that
used externally.
Construction
Frame members are mitre cut at 45°.
Corners are reinforced with extruded
aluminium crimping cleats and corner
braces. A secure joint is formed by
pneumatically crimping into the extruded
crimping cleat. Mullion and
transom bars are square cut, shaped and
fixed securely to the frame by means of
stainless steel screws and fixing cleats. All frame joints are
sealed during construction against entry of
water using a suitable 'small gap' sealant.
Extruded weatherstrips and glazing
gaskets are provided to resist the ingress
of water.
Glazing
Glass is set against co-extruded gaskets externally
which are fitted into gasket grooves in the
frame upstand. Clip in beads are then
fitted to the inside of the frame and held secure by
means of colour coded wedge gaskets internally.
For glass
support purpose made setting/location
blocks are provided to locate into the
sections. Where open out doors and fixed
lights are required, liner bars to give
internal glazing to fixed lights should be
considered.
Door Fittings
The sections are designed to suit clarnp
fixed hinges, one piece door lock (2 hooks
Bi 2 cams), shoot bolts to slave leaf, euro
cylinder locking and lever handles. HWA are able to supply a range of
fittings and accessories.
Performance
The low rise threshold options are suitable
for moderately exposed ground floor
applications only. Where performance is
critical, or above ground floor, fully rebated
doors must be used.
Performance data for fully rebated double
and single doors only:
Air permeability - BS 6375 : Pt. 1 : 1983
Water tightness - BS 5375 : Pt. 1 : 1983
Wind resistance - BS 6375 : Pt. 1 : 1983
These levels of performance should be
sufficient for most locations within the UK.
Should higher levels of performance be
required, HWA's advice should
be sought.
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