(G) DOORS & WINDOWS LIST OF BUREAW OF INDIAN STANDARD CODE OF PRACTICE (ISI)

Transcription

1 (G) DOORS & WINDOWS LIST OF BUREAW OF INDIAN STANDARD CODE OF PRACTICE (ISI) 4021 : Specification for teak wood. 287 : Recommendation for maximum permissible moisture content 1141 : Specification for code of practice for seasoning of timber : Specification for wooden flush shutters. 401 : Code of practice for preservation of timber 1003 (Part I & : Specification for timber paneled and glazed shutters II) 6534 : Code for workmanship in wood work 2338 : Specification for code of finishing of joinery. 733 : Specifications for wrought aluminium and aluminium alloys bars and sections. 285 : Specification for aluminium alloys bars and sections : Specifications for aluminium doors, windows and ventilators : Specifications for aluminium windows for industrial buildings : Code for hot dipped galvanizing 6243 : Code for rolling shutter. 1.0 ALUMINIUM WINDOWS AND DOORS: IS:1948 & IS:1949: Aluminium alloy shall conform to IS: 733 and IS: 285. The contractor shall submit the sample of section he is proposing to use for the frame, for approval. He shall also indicate the

2 weight of section per one metre length. He shall also submit for approval the sample of hinges, handles, pegstays or any other items that may require the approval of the Engineer. The contractor shall submit shop drawings for assembly and fixing of doors & windows and fabrication shall be started only after approval to the shop drawings. The glass panes, unless otherwise specified, shall be of 5.2mm to 5.5mm thickness for windows and 5.5mm thickness for doors and shall be free from flaws, specks and bubbles. They shall have property squared corners and straight edges. Fixing to frames shall be done with approved glazing pins and approved EPDM rubber gaskets as specified. Frame consisting of extruded hollow rube sections or other profiles shall be square and flat, the corner of the frame being fabricated to a true right angle. The hinges shall be either or projection type, or friction hinges. Necessary coupling of approved shape shall be provided for composite windows. All holes required for fixing frame, for fixing glazing shall be provided. Only brass screws shall be used for fixing the frame to concrete members. Vertical and horizontal members shall be of adequate rigidity to resist lateral forces. Design calculations shall be submitted for deflection of members. All the fixtures for center hung shutters, top and bottom hung shutters, or side hung shutters shall be got approved before they are used. The fixtures used should be such that it should

3 be possible to open the shutter to any angle. The pins of hinges shall be of stainless steel of non-magnetic type. Unless otherwise specified, aluminium doors shall be provide with floor springs of approved quality and make. All aluminium members shall be supplied in either matt or polished finish including anodizing them by electrochemical process to an approved colour and to a thickness of average 20 micron. The frame shall be protected with a layer of clear transparent lacquer based methacrylates or cellulose butyrate. The coating shall be removed after installation is completed and after completing finishing work in the adjoining area. The erection of frame shall as detailed under steel windows. Where aluminium frames come in contact with steel members, they shall be separated by either a 3mm thick rubber gasket for full width or aluminium member or any other approved film so as to avoid metallic corrosion. 1.1 ROLLING SHUTTERS (IS:6248) Rolling shutters shall be as per the size to suit the dimensions of the openings shown in the drawing. Unless otherwise specified, they shall be fabricated out of 18 gauge thick G.I. laths of convex corrugation with rolling center either 75mm or 65mm and with minimum 12mm corrugation depth. The laths shall be interlocked by alternate end clips.

4 The side guides shall either be of rolled section or one piece pressed construction and shall be of size 25mm wide, 75mm deep. Thickness shall not be less than 3mm. The shutter shall be provided with bottom lock plate 3mm thick and reinforced by an angle iron stiffener at the bottom and G.I. flat at the top. The suspension shaft shall be of adequate design and unless otherwise specified shall be formed from 8 gauge seamless tube, 60 mm O.D. with suitable flange coupling. The springs shall be of approved high tensile steel flat or coil spring hardened and tempered. These shall be fitted inside the fabricated housing. The ball bearings shall be double self aligning ball bearings fitted inside CI housing fixed on side brackets holding the suspension brackets at either ends. The suspension of the shutter shall be bolted on specially fabricated cages formed from G.I. flats and plates all are welded. The hood cover shall be made of 20 gauge G.I. sheets with necessary stiffeners and framework. The locking arrangement shall consist of hoop and stable on the bottom plate, lockable from both the sides.

5 Unless otherwise specified, for overall area of rolling shutters upto 5 sqm pull and push type hand operated shutters shall be provided, for area from 5 sq.mtrs. to 10 sq.mtrs. and push type with ball bearings shall be provided and area larger than 10 sq.mtrs. mechanically operated gear and/or electrically operated shutters shall be provided (Gears will be paid extra). The shutters, hook covers, etc. shall be given 2 coats zinc chromate primer after thorough surface preparation and further 2 coats of paint of approved quality and colour. The erection of these shutters shall be carried according to manufacturer s specifications. While fixing to concrete members, only shelf anchors shall be used. Chiselling of concrete for fixing bolts will not be allowed. 1.2 COLLAPSIBLE STEEL GATE: It shall consist of vertical double channels at 10 cm. centers. The size of channels T. Section for top and bottom shall be as per drawing and EIC. The gate shall be provided with necessary bolts, nuts, locking arrangements, stoppers and brass handles on both sides. The gate shall be painted with one coat of anticorrosive paint before erection and two coats of synthetic enamel paint of approved quality and shade. All above material shall be of galvanized iron. 1.3 MODE OF PAYMENT AND MEASUREMENT Aluminium Doors and Windows: The rate quoted shall include the cost of supplying, fabricating and fixing in position frames, glass panes, EPDM, all fixtures, hinges etc. anodizing, applying protection cover embedding the holdfasts in concrete and/or

6 fixing the frame to concrete members with rawal plugs and brass screws and where necessary the cost of EPDM (3mm thick) barrier between aluminium member and steel member etc. complete. Measurement shall be on square metre basis for the actual work provided. FRP Doors Shutter: Supplying FRP molded shutters 35mm thick, in panel, design as approved. FRP thickness to be 2.0m width area extra reinforcements on sides and edges. The core of the shutter to be polyol foam done in situ with wooden style embedded for taking hinges, fixtures etc. both sides of shutters to be finished in gel-coat. Shutters to have recess for hinges. The whole shutter to be totally water proof resistant to mild acids, alkalies Colour/painting as per direction of Engineer-incharge. Measurements: Shutters shall be measured on Square metre basis & Shutters shall be paid on actual dimensions of shutter in sq.mtr. Signature of Tenderer Date.: Additional Engineer(I&NT) Date.: Chief