This standard outlines the specifications for steel filing cabinets intended for general office environments, detailing the requirements for materials, dimensions, construction, finishing, and performance testing to guarantee reliability and usability. It targets manufacturers, suppliers, and users aiming for consistent quality and functionality in two-, three-, and four-drawer steel filing cabinets.
Overview
This standard outlines the specifications for steel filing cabinets intended for general office environments, detailing the requirements for materials, dimensions, construction, finishing, and performance testing to guarantee reliability and usability. It targets manufacturers, suppliers, and users aiming for consistent quality and functionality in two-, three-, and four-drawer steel filing cabinets.
Audience
Contents
Structure
The standard defines the materials, dimensions, construction criteria, finishing, and testing procedures for steel filing cabinets intended for typical office usage. It covers two-, three-, and four-drawer models with specified measurements and installation clearances.
Details on the use of mild steel sheets adhering to specified grades, requirements for scratch hardness testing, corrosion protection via phosphate treatment, and the dimensional guidelines with tolerances for cabinet fabrication.
Descriptions of two-, three-, and four-drawer cabinet types, their overall dimensions, minimum space allowances for installation, and drawer construction specifications including steel thickness and locking provisions.
Precise measurements for height, width, and depth of each cabinet type, tolerance limits for manufacturing, and minimum clearance requirements for recess installations.
Guidelines on cabinet assembly, finish specifications, scratch hardness testing, and surface treatments including phosphate coating and painting processes to ensure durability and appearance.
Standards and codes for welding methods such as gas, arc, and spot welding, electrode specifications, and acceptable assembly techniques including bolting and riveting.
Procedures for pickling, phosphating, putty application, priming, and painting, alongside performance tests to verify adhesion, flexibility, and hardness of the finish.
Requirements for scratch resistance and flexibility of painted surfaces, including sample preparation, testing methods, and acceptance criteria to ensure a long-lasting finish.
Description of suspension types allowing full drawer extension, load and cycle testing protocols, operational smoothness criteria, and durability standards.
Instructions for securely packing all cabinet components to prevent damage during transportation, including recommended cushioning materials and securing methods.
Details that buyers must specify when placing orders, such as cabinet type, finish color, drawer mechanisms, and corner finishing preferences to ensure correct manufacturing.
Requirements for manufacturer identification marks, optional ISI certification marks, and labeling to ensure traceability and compliance with standards.
Description of the test setup and apparatus used to simulate drawer operation under load, including cycle counts, speed, load distribution, and acceptance criteria for durability and smooth movement.
Frequently Asked
The standard specifies these minimum steel sheet thicknesses: sides and back panels must be at least 0.8 mm thick; the top and bottom panels should also have a minimum thickness of 0.8 mm; the locking mechanism components require a thickness of no less than 1.6 mm. These dimensions ensure the structural strength and longevity of the filing cabinet.
IS 3313 recognizes three types of drawer suspensions: ball-bearing, solid-roller, and ball-bearing-roller systems, all designed to permit full drawer extension. Load endurance testing involves operating the drawer through 50,000 cycles at a rate of 1,000 cycles per hour, carrying a uniformly distributed load of 30 kg excluding the drawer's own weight. Additionally, under a 20 kg load, cradle strips must not deflect more than 3 mm vertically, and edges should be smooth and rounded to facilitate file movement. These criteria ensure durability and smooth operation.
The standard allows two types of locking systems: an automatic unit lock with at least six levers, and a pin cylindrical lock containing a minimum of four pins. All locks must be constructed from steel sheets at least 1.6 mm thick and be capable of simultaneously securing all drawers from the front. Keys provided must be fabricated from non-corrosive metals and locks should conform to IS 729-1979 requirements, ensuring security and durability.
Following pickling, all mild steel components must receive a phosphate coating compliant with Class C of IS 3618-1966, applied according to IS 6005-1970, enhancing corrosion resistance and paint adhesion. Surface imperfections should be filled with putty per IS 110-1968, followed by application of an aluminium primer conforming to IS 5660-1970. The final enamel or paint finish must be agreed upon by purchaser and manufacturer and must pass scratch hardness and corrosion resistance tests as defined in IS 101-1964. This layered treatment ensures robust protection against corrosion.
Durability testing involves a mechanical setup that simulates drawer opening and closing cycles at a speed of 1,000 cycles per hour, with each cycle comprising one full opening and closing movement, where the drawer extends up to 90% of its depth. The drawer is loaded evenly with 30 kg (excluding its own weight) during testing. The total test consists of 50,000 cycles. Upon completion, the drawer suspension must exhibit no deformation, cracks, or operational faults and must function smoothly, thereby verifying endurance under repeated use.
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