The 1960 edition of IS 1081 outlines detailed procedures for the installation and glazing of metal doors, windows, and ventilators constructed from steel and aluminium. This standard emphasizes proper fixing techniques to guarantee robustness, weather resistance, and structural soundness across various surround types such as masonry, timber, and steel frameworks. It is an indispensable reference for professionals aiming to ensure optimal performance and longevity of metal fenestration in buildings.
Overview
The 1960 edition of IS 1081 outlines detailed procedures for the installation and glazing of metal doors, windows, and ventilators constructed from steel and aluminium. This standard emphasizes proper fixing techniques to guarantee robustness, weather resistance, and structural soundness across various surround types such as masonry, timber, and steel frameworks. It is an indispensable reference for professionals aiming to ensure optimal performance and longevity of metal fenestration in buildings.
Audience
Contents
Structure
An overview of recommended procedures for installation and glazing of metal doors, windows, and ventilators made of steel and aluminium, including materials and workmanship criteria. Fixing materials are detailed in Table 7.1 with specifications for various surrounds such as wooden frames, masonry (rebated and plain), and steelwork. Responsibilities of fixing and general contractors regarding hole preparation, grouting, plastering, scaffolding, and cleaning are clarified. Important note prohibits painting moving parts like hinges to maintain free operation.
Standard definitions relevant to metal fenestration and fixing are provided to ensure uniform understanding. Fixing materials per Table I specify galvanized wood screws for wooden and masonry surrounds, slotted adjustable steel lugs for direct masonry fixing, and clips with galvanized bolts for steel attachments. Emphasis on using corrosion-resistant fasteners and correct screw lengths depending on the surround type.
Describes the types of structural openings suitable for metal doors, windows, and ventilators, including masonry, timber, and steelwork. The necessity for the frame flange to overlap steel surfaces in steelwork openings is highlighted for stability. Specifies clearance requirements between the frame and the opening, varying with whether the opening is rendered or fair-faced, to facilitate proper fitting and sealing using mastic.
Details the selection of fixing materials according to the surround and fixing method. These include galvanized wood screws of specific lengths for rebated and plain jambs, slotted steel lugs for direct masonry fixing, and clips with bolts for steel frames. Notes on corrosion protection, plug usage, and proper embedment to ensure secure installation are included.
Specifies that modular opening sizes should exceed unit dimensions by 12.5 mm on all sides to allow for fixing and sealing. Fixing materials and methods corresponding to surround types follow Table I. Directions for protecting composite metal units during installation are provided to avoid damage, emphasizing the use of galvanized fasteners and appropriate gap filling.
Outlines step-by-step fixing processes for metal fenestration units, reiterating the use of specified fixing materials per surround type. Includes guidance on handling composite units, use of plugs for accurate positioning, and immediate removal of construction splashes to maintain material integrity. Ensures adherence to IS 1081 standards for durability.
Reiterates the table of recommended fixing materials and their applications for various surround conditions. Highlights requirements for galvanized fasteners and the importance of cleaning splatters during installation. Also stresses the prohibition of painting moving parts to maintain functionality.
Presents specific instructions for the installation of composite metal fenestration units, aligning with clauses 7 and 8. Stresses protection of aluminium frames from contact with wet mortar, the application of mastic when fixing to steelwork, and use of special clips or bolts supplied with units. Emphasizes alignment and sealing to prevent damage and ensure weather tightness.
Details the removal of hardware before installation and securing of moving components to prevent damage during erection. Fixing materials are specified as per surround type. Advises against painting working parts such as hinges and handles to preserve free movement. Responsibilities of fixing and general contractors regarding hole preparation, scaffolding, and cleaning are outlined.
Specifies that glass panes larger than 60 cm by 30 cm require securing with special spring glazing clips inserted into pre-drilled holes prior to application of front putty, as per IS 1038-1975. Screw fixing of glazing beads must follow specified spacing limits to ensure stability. Notes limitations on standard sections for double glazing, recommending deeper rebates or special inserts. Emphasizes the importance of not painting working parts.
Describes painting procedures including the prohibition of applying paint on moving parts to avoid restricting their motion. Specifies undercoat and finishing coat requirements for ungalvanized and galvanized surfaces, including preparation methods like natural or chemical etching and use of calcium plumbate primers. Clarifies responsibilities for painting and cleaning among contractors.
Clarifies the division of responsibilities between fixing and general contractors, including hole cutting in masonry versus steel or reinforced concrete, grouting, making good, plastering, and scaffolding provision. Reiterates fixing materials and glazing methods. Highlights the necessity to avoid painting working parts and to allow for structural movement without imposing stress on fenestration units.
Summarizes the duties of fixing and glazing contractors in preparing openings, installing units, making adjustments, grouting, and cleaning. Specifies that painting and glass cleaning are not the responsibility of fixing contractors. Notes the general contractor’s role in preparing steel and reinforced concrete openings, correcting misalignments, and providing scaffolding. Includes fixing material specifications and glazing clip usage.
Highlights the amendment focusing on fixing methods including screws, bolts, and welding; glazing provisions concerning glass thickness and size; use of sealants and gaskets for weatherproofing; and dimensional tolerances for frame installations. Includes typical glass thickness ranges relative to frame widths and maximum fixing spacing. Reinforces the use of sealants and adherence to dimensional standards for durable assemblies.
Frequently Asked
As per IS 1081 Clause 7.1 and Table I, fixing methods differ depending on the surround: wooden rebated frames use 38 mm by No.10 galvanized wood screws; rebated plugs in concrete, stone, or brick use the same screws; plain jambs in concrete or masonry require longer 63 mm by No.10 galvanized wood screws; direct fixing to brick or masonry uses slotted steel adjustable lugs; steelwork attachments employ standard clips combined with 8 mm galvanized bolts and hex nuts. Plastering is applied after fixing lugs and sealing joints with mastic to ensure weather tightness.
IS 1081 mandates that for glass panes exceeding 60 cm by 30 cm, special spring glazing clips must be used, inserted into pre-drilled holes in the metal frame before applying front putty. The number and placement of these clips are detailed in IS 1038-1975. Smaller panes may be secured with putty alone. This ensures secure glazing that accommodates structural movements without damage.
The code specifies galvanized fasteners tailored to the fixing surround: 38 mm by No.10 galvanized wood screws for wooden rebated frames and rebated plugs; longer 63 mm screws for plain plugs; slotted steel adjustable lugs for direct masonry fixing; and standard clips with 8 mm galvanized bolts and hex nuts for steelwork. Galvanization ensures corrosion resistance and durability.
Although IS 1081 does not explicitly detail handling protocols, it implies the necessity of protecting metal frames from damage by recommending protective coverings during transport and storage, careful handling to avoid deformation, storing in dry and stable environments, and cautious installation practices including the use of shims and supports to prevent stress. Glass panes should be handled carefully to avoid edge damage.
IS 1081 advises applying mastic generously to mullions and transoms before assembly, clamping units tightly to squeeze out excess mastic, and then securing with screws to form a weatherproof seal. A clearance of 3 mm plus rendering thickness between frame flanges and masonry openings is recommended to allow structural movement without imposing strain on fenestration units. Aluminum frames should be protected from wet mortar and working parts left unpainted to ensure free operation.
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