The 1980 specification defines the criteria for floor door stoppers intended for door shutters with thicknesses ranging from 30 to 45 mm. It outlines requirements related to dimensions, materials, manufacturing standards, labeling, packaging, and quality conformity to guarantee dependable operation and interchangeability. This specification is vital for producers, distributors, and inspectors involved with floor door stoppers in building hardware.
Overview
The 1980 specification defines the criteria for floor door stoppers intended for door shutters with thicknesses ranging from 30 to 45 mm. It outlines requirements related to dimensions, materials, manufacturing standards, labeling, packaging, and quality conformity to guarantee dependable operation and interchangeability. This specification is vital for producers, distributors, and inspectors involved with floor door stoppers in building hardware.
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Contents
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Frequently Asked
Per the 1980 specification, approved materials for floor door stoppers include:
Body or Housing and Cover Plate:
Rubber Shock Absorber:
Springs and Tongue:
These selections ensure durability, corrosion resistance, and effective performance.
The specification outlines dimensions and permissible deviations for door shutters of thicknesses 30, 35, 40, and 45 mm as follows:
| Door Thickness (mm) | A (mm) | B (mm) | Minimum C (mm) | Casting Thickness T1 (mm) | Sheet Thickness T1 (mm) | Screws for Casting | Screws for Sheet | Number of Holes |
|---|---|---|---|---|---|---|---|---|
| 30 | 35 | 140 | 13 | 4.5 | 3 | 9 | 8 | 4 |
| 35 | 40 | 140 | 8 | 4.5 | 3 | 9 | 8 | 4 |
| 40 | 45 | 150 | 13 | 4.5 | 3 | 9 | 8 | 4 |
| 45 | 50 | 150 | 8 | 4.5 | 3 | 9 | 8 | 4 |
Tolerances are defined as:
These parameters assure correct fit and functionality of floor door stoppers with specified door shutter thicknesses.
The standard requires that each floor door stopper be permanently and clearly marked with the manufacturer's name or trademark along with the shutter size it is designed for. Packaging should involve wrapping each stopper in craft or polyethylene paper to protect against moisture, followed by placement in cardboard boxes. The boxes themselves should bear markings that include the manufacturer's identification, the applicable shutter size, and the quantity contained within. Additionally, a rubber piece must be fixed to the stopper’s end for shock absorption, conforming to specified hardness and density requirements to ensure longevity and performance.
The recommended sampling procedure involves randomly selecting floor door stoppers from at least 10% of the packages, with a maximum of three stoppers chosen from each package. The sample size depends on the total lot size, as defined:
| Lot Size | Sample Size | Maximum Allowed Defective Units |
|---|---|---|
| Up to 100 | 5 | 0 |
| 101 to 300 | 20 | 1 |
| 301 to 500 | 32 | 2 |
| 501 to 1,000 | 50 | 3 |
| Above 1,000 | 80 | 5 |
All sampled stoppers undergo testing for dimensional accuracy, material quality, manufacturing defects, and finish. A batch is accepted if the count of defective units does not exceed the permissible limit; otherwise, it is rejected. This method ensures statistically valid quality control.
Yes, floor door stoppers complying with this specification may bear the ISI Certification Mark provided the manufacturer has obtained the appropriate license from the Indian Standards Institution (ISI). The ISI mark signifies adherence to the standard through established inspection, testing, and quality control procedures. Its use is regulated under the Indian Standards Institution (Certification Marks) Act and associated regulations, offering assurance of product quality and conformity to the standard.
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