Specification for steel windows for industrial buildings 1978 Edition
This standard outlines the specifications for steel windows intended for use in industrial structures such as factories and warehouses. It details modular dimensions, materials, fabrication processes, hardware, finishes, and installation criteria to ensure robust, functional, and modular steel window assemblies suited to the demanding conditions and larger apertures typical of industrial settings.
This standard outlines the specifications for steel windows intended for use in industrial structures such as factories and warehouses. It details modular dimensions, materials, fabrication processes, hardware, finishes, and installation criteria to ensure robust, functional, and modular steel window assemblies suited to the demanding conditions and larger apertures typical of industrial settings.
Audience
Who Uses This Standard
Structural design engineers
Architects focused on industrial construction
Steel window and ventilator manufacturers
Construction site supervisors
Quality assurance inspectors
Building regulation compliance officers
Maintenance engineers for industrial facilities
Contents
Key Topics Covered
✓Modular dimensioning system for industrial steel window units
✓Varieties and measurements of steel sashes and ventilators
✓Specifications for steel materials and fittings
✓Welding and fabrication standards for window frames
✓Hardware including pivots, spring catches, peg stays, and cam openers
✓Surface protection methods: galvanizing and painting
✓Glass pane requirements and glazing techniques
✓Assembly of composite windows and joining components
✓Location and sizing of fixing holes and installation hardware
✓Marking and identification protocols for fabricated windows
✓Quality assessment procedures for welded joints
✓Installation tolerances and clearance standards
Structure
Table of Contents
1Scope and Application
2Terminology and Definitions
3Sash Orientation and Closing Mechanisms
4Assembly of Composite Window Units
5Standard Dimensions and Manufacturing Tolerances
6Materials and Corrosion Treatment
7Fabrication Techniques and Welding Standards
8Fixing Hole Placement and Glazing Clip Details
9Fittings and Fastening Components
10Composite Window Construction Guidelines
11Specifications for Glass Panes
12Surface Finishes and Protective Treatments
13Marking, Identification, and Traceability
14Packaging and Shipment Instructions
Frequently Asked
Popular Questions About IS 1361
?What are the standardized sizes and modular measurements for industrial steel windows as per this specification?▼
The standard sizes for steel windows in industrial buildings are based on a 100 mm modular grid system, providing 10 mm clearance around the sash frames to facilitate fitting into openings. Dimensions for sash height and width correspond to multiples of 10 cm plus this clearance, following modular coordination guidelines to ensure uniformity and ease of installation.
?Which materials and steel grades are prescribed for the manufacture of steel window components?▼
Steel sections used for fabricating industrial window frames must comply with IS 7452-1974 for hot-rolled steel. The material for these sections should meet IS 1977-1969 standards for ordinary quality structural steel. All mild steel hardware components like bolts, nuts, screws, washers, and peg stays are required to undergo appropriate corrosion protection treatments.
?What types of ventilators are included in this standard and how are they operated?▼
The standard covers centre-hung ventilators, which pivot horizontally at the midpoint of each side with upper halves opening inward and lower halves opening outward, and bottom-hung ventilators hinged at the base that open inward. These ventilators are constructed as separate inner opening frames within fixed outer frames, secured with steel screws and designed for smooth pivot action.
?What are the fabrication and welding requirements to ensure quality in steel window frames?▼
Steel window frames must be accurately cut and mitred, then welded at corners using any suitable welding method that produces sound, continuous joints. Welds must be smooth, free from defects such as slag, porosity, cracks, or voids, and frames must remain square and flat after welding. Visual inspections are performed post-fabrication to verify weld integrity.
?What surface treatments are recommended for protecting steel windows against corrosion?▼
Steel surfaces should be cleaned by pickling or phosphating to remove contaminants before treatment. Hot-dip galvanizing is preferred for durability and is dispatched unpainted. Where galvanizing is not used, two coats of red oxide primer paint should be applied immediately after cleaning. Zinc spray or electrogalvanized finishes require one coat of red oxide paint for additional protection. All mild steel hardware must also be suitably corrosion treated.
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