The standard outlines specifications for rising butt hinges, which are primarily used to attach door shutters to frames with an automatic closing feature. It defines criteria regarding materials, dimensions, construction, and performance for hinges made from cold rolled mild steel, cast iron, and extruded brass. This specification is crucial for manufacturers, suppliers, and professionals involved in selecting door hardware for commercial and public buildings requiring self-closing doors.
Overview
The standard outlines specifications for rising butt hinges, which are primarily used to attach door shutters to frames with an automatic closing feature. It defines criteria regarding materials, dimensions, construction, and performance for hinges made from cold rolled mild steel, cast iron, and extruded brass. This specification is crucial for manufacturers, suppliers, and professionals involved in selecting door hardware for commercial and public buildings requiring self-closing doors.
Audience
Contents
Structure
Defines the applicability of the standard to rising butt hinges fabricated from steel and cast iron, detailing dimensions, tolerances, and quality requirements. Includes key dimension tables and notes on handedness and sampling criteria.
Describes the types of rising butt hinges categorized by materials such as cold rolled mild steel, cast iron, and extruded brass, alongside relevant Indian Standard grades applicable to each component.
Specifies the materials for various parts of the hinge, including grades for flaps and pins, referencing Indian Standards for steel, cast iron, brass, and steel wire.
Lists detailed hinge dimensions (in millimeters) including length, width, pin diameter, flap thickness, and rise at specified angles, along with corresponding tolerance limits for different materials.
Outlines construction details such as pin fixity, flap thickness, hole arrangements, and specifies handedness requirements for ordering.
Details requirements for hole positioning, screw hole patterns, minimum clearances, sampling procedures, and quality criteria to ensure durability and proper fit.
Specifies that hinges must be permanently and clearly marked with manufacturer identification or trade mark, and optionally the ISI certification mark in compliance with licensing regulations.
Describes packaging methods, standard pack sizes, labeling requirements including hinge type, size, quantity, and manufacturer details for traceability.
Provides sampling plans based on lot sizes, permissible defective hinge counts, and criteria for lot acceptance or rejection to maintain quality control.
Defines what constitutes a lot and details the statistical sampling methodology and acceptance thresholds for quality assurance.
Specifies sample sizes corresponding to lot sizes, requirements for random selection from packages, and distribution of samples to ensure representative quality evaluation.
Frequently Asked
The standard specifies that rising butt hinges should be made from cold rolled mild steel, cast iron, or extruded brass for the flap components, while the hinge pins must be manufactured from mild steel wire. The relevant Indian Standards for these materials include IS 1079-1973 for hot rolled steel, IS 4030-1973 for cold rolled steel strips, IS 210-1978 for grey cast iron, IS 319-1974 for brass, and IS 280-1972 for mild steel wire. These materials are selected to ensure mechanical strength and durability.
Dimensions such as length of joint, open width, pin diameter, flap thickness, and vertical rise at 90° and 180° are specified for steel, cast iron, and brass rising butt hinges with detailed tables outlining values for standard sizes (e.g., 75 mm, 100 mm). Tolerances vary with material type, for example, steel hinges have ±0.5 mm on length, ±2 mm on width, and ±0.05 mm on pin diameter, ensuring precision in manufacturing and proper fit during installation.
Pins must be made of steel wire and be securely fixed; steel hinges may have loose-headed pins while brass hinges require pins flush with the hinge ends. Screw holes on flaps with more than two screws must be arranged in a zig-zag pattern with equidistant spacing. Minimum clearances from flap ends are specified to guarantee strength and avoid material failure. Hinges are also handed, necessitating left or right-hand specification when ordering.
Each hinge must be marked clearly and permanently with the manufacturer's name or trademark. Optionally, hinges can bear the ISI certification mark if licensed. Packaging should use cardboard boxes or approved materials with standard pack sizes of 10 hinges, or multiples of 6 if requested. Packages must be labeled with hinge type, size, quantity, and manufacturer details to ensure traceability and ease of identification.
Sampling plans depend on the lot size, with sample sizes ranging from 5 to 80 hinges and permissible defective counts accordingly. Hinges selected randomly from multiple packages undergo dimensional, material, and performance testing per the standard. Lots are accepted if the number of defective hinges does not exceed the permissible limit. Testing includes dimensional verification, material grade checks, and functional performance evaluations, with results rounded as per IS 2-1960.
Ask AI about any clause, requirement, or provision in IS 9106. Get instant, clause-cited responses powered by our indexed library.
Free tier includes 150 queries (50 AI + 100 Reference) · No credit card required