Specification for Aluminium Windows for Industrial Buildings
1961 Edition

The standard mandates that aluminium extruded sections for window frames adhere to IS Designation HE9-WP under IS: 733-1956, covering wrought aluminium and alloys suitable for general engineering. Hollow extrusions must comply with IS Designation HV9-WP of IS: 1285-1958. Cast hinges require aluminium alloys conforming to IS Designation A-5-M of IS: 617-1959. Extruded hinge sections should meet HE10-WP or HE30-WP of IS: 733-1956. Additionally, pins are to be made from non-magnetic stainless steel or aluminium alloy HR 30 with anodization ensuring a minimum oxide film thickness of 0.025 mm. Coupling members must be fabricated from extruded aluminium alloys as detailed in the code's figures, ensuring mechanical strength and corrosion resistance appropriate for industrial window applications.

Ventilators are defined as the operable sash components comprising an inner and outer frame. The centre-hung ventilator pivots horizontally at its center, with the upper section opening inward and the lower outward. Bottom-hung ventilators are hinged along the bottom edge and swing inward. All ventilators maintain uniform dimensions, designed to fit within the IN 10 C 10 outer frame section, with a clearance of 1.2 mm to facilitate smooth operation. These standardized definitions and sizing ensure consistent interchangeability and functional integration within industrial window systems.

Window dimensions follow a modular system based on 100 mm increments. Aluminium extrusions must comply with IS: 733-1956 (HE9-WP) for bars and rods and IS: 1285-1958 (HV9-WP) for hollow sections. The profiles, weights, and forms are specified in the standard's figures. Dimensional tolerances restrict deviations to within ±3 mm for overall window measurements, ensuring strict control for modularity and interchangeability. This framework supports consistent quality and facilitates seamless integration of window components.

The code recommends the use of slotted reversible steel lugs with countersunk steel nuts and bolts for masonry fixing, wood screws compliant with IS 451:1961 for timber installations, and mild steel fixing clips with nuts and bolts for steel substrates. To prevent galvanic corrosion where steel contacts aluminium, steel components must be either galvanized or coated with bituminous paint. Other fittings such as cord-eyes, pulleys, brackets, and catch plates should be made from aluminium, galvanized steel, or cadmium-plated steel. Pivot mechanisms, peg stays, and spring catches are to be fabricated from non-ferrous metals like brass or bronze with chromium or cadmium plating to enhance longevity. All fixing materials must be corrosion-resistant and supplied separately to protect quality during transport.

Glass panes must conform to specified dimensions outlined in Table I, which include clearance allowances. Pane sizes range in width from 265 mm to 300 mm and heights from 420 mm to 490 mm, depending on designation (a to f). Glass quality requirements stipulate absence of defects such as bubbles or specks, with squared corners and straight edges. The density is noted, though likely requiring verification. For secure installation, each pane is fixed using two spring steel glazing clips as per the standard's design illustrations. The number and arrangement of panes vary by window type. These provisions ensure secure, standardized glazing aligned with industrial durability requirements.