1 : SYSTEM I WALL, CEILING AND DOOR PANELS       The System I panel system provides a modular pvc finished construction system that is generally made to size prior to delivery to site. It generally provides a self - supporting structure that can be installed quickly and efficiently. A range of construction materials are available to suit different applications.     The Standard System I composite clean room panel is manufactured from a single slab of thermal insulation which is bonded between two outer skins with a 1-component polyurethane adhesive which, by the humidity of the air cures to a hard, tough non toxic polyurethane resistant to chemical and heat. The foaming which occurs during curing ensure 100% adhesive coverage to all core materials and therefore guaranteed lamination.     Panels are manufactured in standard widths of 1200mm nominal. Other widths are available by special order.     Panels with standard facings have been tested to BS476 part 7 and classified Class 1 surface spread of flame.   2 : CORES     Expanded Polystyrene (EPS)     There are two grades of EPS available. Standard density (SD) at 15kg/m³ or heavy density (HD) at 20kg/m³, these are supplied with a fire retardant additive.     Fire retardant additive (FRA) is formulated to restrict the extent of burn when tested to BS4735 1974. It is classified P, ‘not easily ignitable’ when tested to BS476 part 5 1979.   Extruded Polystyrene (Styro)     Extruded polystyrene, at a density of 28kg/m³ has a high thermal performance and excellent structural properties. The fully closed cell structure ensures a high resistance to water absorption and water vapour permeability.   Polyisocyanurate (PIR) Rigid Foam     Polyisocyanurate (PIR) at normal density of 34kg/m³ has a high thermal performance and excellent structural properties. Its closed cell structure resists water ingress. PIR foam is able to withstand temperatures up to 140 degrees centigrade and has a greatly increased resistance to burning and spread of flame. This material when tested to BS476 part 7 has a class 1 surface spread of flame.   Mineral fibre (Rockwool)     Rockwool mineral fibre cored composite panels are capable of achieving an A2 rating under the EU classification system for Reaction to Fire. This is the highest achievable rating by an insulated composite panel. The panel is produced on a fully integrated bonding line and uses a foaming polyurethane adhesive to ensure adequate and repeatable bonding between the Rockwool and the steel facings.     The core of the Rockwool panels is comprised of two important elements both manufactured from Rockwool:   High Density Edge Strips – Precision cut to take the slip joint detail and by virtue of their superior structural performance provide excellent structural and fire performance at the critical joint area.   Standard Density Infill – Precision cut to maximise structural performance of the panel which could otherwise be compromised by ‘stepping’ between poorly cut lamellas.       Structural Performance – Technical data is available on request.     Fire Performance - A sample of the Rockwool panel system was tested to the Final Draft prEN 13823 at the Swedish National Testing and Research Institute in June 2001. The result confirmed that the system can achieve A2 performance. A copy of the test report is available on request.     The results of tests undertaken by our laminators by the loss Prevention Council are summarised below:     Note: Due to the nature of clean room requirements, rooms constructed from Rockwool cored panels are generally "non-combustible". Special arrangements are required to achieve the above full ratings with specific details required for doors etc.       SUMMARY SPECIFICATION:     Panelcore: 50 to 200mm thick Rockwool mineral fibre     Skins: Galvanised pre-stressed steel, laminated with 0.7mm PVC     Surface spread of flame: Class "0" (BS476:part2)     Core: Non-combustible rating (Loss Prevention Council)     3 : FACINGS     Standard Facings     Panels can be supplied with a variety of steel and other facings with either flat or profiled surfaces.     All the standard facings when tested to BS476 part 7 have been classified class 1 surface spread of flame. (BS476 Part 7)     PVC Film Laminate     0.5mm – 0.7mm thick hot dipped galvanised mild steel substrate with a white hard PVC film coating 150 microns thick. The PVC film laminate is foodsafe with excellent scratch resistance, which is easy to clean.     Polyester (prelaque foodsafe)     0.5mm - 0.7mm thick hot dipped galvanised mild steel substrate with 27 microns thick white internal polyester. The polyester coating is fully foodsafe and is recommended for cold store use within clean room installations.     Double Sided Grey Primer     0.5mm – 0.7mm thick hot dipped galvanised mild steel substrate with 10-15 microns thick epoxy paint coating to both sides which is a cost effective coating suitable for foam adhesion especially for unexposed faces.     200XT Plastisol     0.5mm – 0.7mm thick hot dipped galvanised mild steel substrate with a 200 microns thick paint leathergrain emboss coating available in a range of colours (refer to colour chart). 200XT Plastisol has an excellent corrosion resistance and is especially suited for external use.     Non Steel Facings     UPVC     2mm thick white gloss extruded UPVC coating has excellent chemical resistance and can be easily cleaned. This material when tested to BS476 part 7 has a class 1 surface spread of flame.     GRP     2.4mm thick glass reinforced plastic coating has an excellent impact resistance together with its resistance to chemical and moisture attack it can easily be cleaned.     This material can be supplied with either a class 1 or class 3 surface spread of flame when tested to BS476 part 7.     Other facings available upon request.     4 : JOINTS     Joints can be made in the following way.     Slip Joint     The metal faces are turned in a manner that forms a male/female steel joint. Whilst giving a secure joint it is designed to take liquid weld or silicone sealant if required. (Liquid weld is normally the sealant of choice, giving a hard, cleanable finish that is superior to silicone and yore sealants.)   Tongue & Groove     Panels are joined together using a tongue and groove joining system that is sealed with a liquid weld or silicone sealant. The connecting tongue can be expanded polystyrene or WPB plywood.     Alternatively as is the case with UPVC or GRP faced panels an H-section joint to the panel faces can be used.   5 : STRUCTURAL PROPERTIES     Wall panels are subject to a maximum height to thickness ratio of 65:1.     Maximum ceiling panel spans recommend conform to BS6399: part 1:1984 for walk-on-ceilings with deflection limited to span/240. For further information please see separate load/span data sheet.   6 : QUALITY SYSTEM     System I panels are manufactured under a Quality Assurance environment which conforms to BSEN ISO9002.     The Quality System was installed by Lloyds Register of Shipping and is maintained by Lloyds Register Quality Assurance.