Acoustics The acoustic performance applied to doorsets is a measure of sound attenuation. Sound is generated over a range of pre determined frequencies in one chamber with the sound received in another chamber, separated by a wall and the doorset. The test procedure is described by reference to BS EN ISO 140-3: 1995 and the results given under this test result in measurement of dB i.e. the average reduction in the sound intensity between the transmitting chamber and the receiving chamber. (Sound Attenuation) A fully sealed (caulked), Nom.44mm thickness, single leaf solid wooden core door of around 630kg/M3 density, when subjected to a BS EN ISO 140-3: 1995 test in an Rw 57 stud wall, provides for a measured performance of about Rw33dB (BS EN ISO 717-1: 1997) Performances achieved by testing of a fully caulked doorset may be taken as a guide to the optimum performance to be achieved using the particular construction under consideration The same doorset that provides for an Rw.33dB performance when fully caulked will generally perform at around Rw.20-23dB when all seals are removed and with operating gaps set to Nom.BS4787: 1980 dimensions. The difference between the sound attenuating performance of a fully caulked doorset and an unsealed doorset results from ‘flanking’ i.e. the leakage of airborne sound around the door. Flanking between the door leaf and the surrounding frame is reduced by the use of seals. Pemko has carried out extensive testing in the United Kingdom and the United States to provide for a wide range of sealing systems that reduce flanking while providing for minimal increases in the operating forces necessary to use the door.
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Continuous Geared Hinge Innovative
design, leading technology Flexibility
in Design • The design of the blades varies to suit a number of applications.Various frame blade designs can be assembled with a number of doorblade designs held together using a common capping section toprovide for an extensive range of standard and special designs for fullymortised, half mortised and surface mounted applications. • The load bearing properties of the PemkoHinge are varied by the use ofDelrin®- Teflon®bearings manufactured to a patented process toprovide for Light Duty, Medium Duty and Heavy Duty options. • All PemkoHinge designs allow for doors to open 180 degrees .However, for some locations wall or frame decoration might preventuse of this facility. Special extended throw options are available forboth fully mortised and half mortised designs.
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Draught & Weather Sealing The heating and cooling of buildings requires the use of energy that has a cost in both environmental and financial terms. There is increasing recognition of a need to conserve energy and to avoid expensive waste. Doors, particularly external doors are opened to allow for the passage of ‘traffic’ but in the process of operation they provide for a means of escape and consequent uneconomic loss of energy. Energy loss can be reduced by the use of ‘performance lobbies’ that prevent the direct loss of energy from the energy source to the outside environment. Performances in this regard can be further enhanced by the use of effective sealing systems that reduce the loss of energy through operating gaps around door leaves while providing for minimal interference with the operation of the door. PEMKO’s
extensive range of seals and other devices (e.g. thermal insulating thresholds)
can minimise energy loss. They also accommodate other considerations that may
apply to a particular opening, e.g. the nature of the ‘traffic’
using the doorway, meeting the needs of the disabled etc.
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Access & Security Access - The term ‘Access’ generally means the ease with which users can enter and circulate around a building, with due regard to other performance requirements e.g. security, fire protection etc. In particular, access should be provided for both ambulant and wheelchair disabled persons. To meet the needs of disabled persons, Designers should refer to BS 8300 : 2001 ‘Design of buildings and their approaches to meet the needs of disabled people - Code of Practice’ and, ‘Approved Document ‘M’:2004’. Pemko offer a wide range of saddles, thresholds and ramps that satisfy the requirements of Document ‘M’. The range of products is extensive and beyond the scope of this Bulletin. For further details visit our website www.pemko.com Security - Security requirements vary according to the location of a doorset. Generally higher levels of security are required for external doors. Internal doors generally require a lower level of security except for ‘protected areas’ or for ‘compartment’ doors e.g. flat entrance doors. There
are an extensive number of product standards and test to measure
the robustness and security performances of a doorset. In all cases,
it is the performance of the doorset as a whole, (including the
quality of installation) and not the performance of individual
components that will determine the level of secuity that can be
provided by a particular doorset design.
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Water Protection System Pemko has invested years of research and engineering into its ingenious new sill design. Pemko’s Water Protection System is 100% leak-proof, rot-proof and maintenance-free. The WPS sill eliminates water infiltration at the points where traditional door jambs and door sills meet, keeping the structure dry and damage-free. The complete WPS system has been thoroughly tested to surpass these portions of AAMA/WDMA/CSA 101/I.S.2/A440-05 Standards: •
Air Infiltration Rating per E 283 - 0.30 scfm/sqft •
Operational Force to Latch 15 lbs •
Water Penetration Test E547 2.9 psf/.56”wc/140Pa
(System results were achieved using WPS components (4404_36, Q108, P112, 210_VE and 315_N) in a 3070 residential steel door and wood frame assembly). Best
of all, the WPS is extremely cost-efficient to purchase and install. It
utilizes industry standard components and can be used in conjunction with any
type of entry door and frame system. The WPS can also be cut to size, making it
ideal for retrofitting existing door and frame assemblies.
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