steel sliding shutters (top hung type)
1983 Edition

This section defines the components of top-hung sliding shutters including the top runner or track, brackets, rollers, angle or T stiffeners, and clocking arrangements, as depicted in Figure 1. It emphasizes the importance of detailed purchaser specifications during order placement. Testing data must adhere to rounding rules according to IS 2-1960, matching the precision of specified values. Frame angles are specified as 50 x 50 x 5 mm mild steel for shutters up to 2 m width and 2.5 m height, and 65 x 65 x 6 mm for larger dimensions. Structural stiffeners are mandated for rigidity, and single or double leaf shutter configurations are permitted.

This part clarifies key terms such as the top runner or track—the horizontal guide for shutter movement, brackets which support the frame, rollers facilitating smooth sliding, angle or T stiffeners reinforcing the frame, clear opening outlines, and clocking arrangements governing shutter alignment. Frame specifications require mild steel angles sized according to shutter dimensions, with materials complying with relevant IS standards. Numerical values for tests must be rounded per IS 2-1960 guidance.

Shutters must exceed the clear opening height by at least 150 mm and width by 300 mm to ensure proper weather protection. Frame angles for shutters up to 2 m wide and 2.5 m high should be 50 x 50 x 5 mm mild steel, while larger shutters require 65 x 65 x 6 mm angles. Both single and double leaf designs are acceptable, with stiffeners included as necessary for structural strength. All dimensions should be rounded according to IS 2-1960 standards.

The code specifies mild steel angles for frame construction, with sizes depending on shutter dimensions. Cover plates must be constructed from hot rolled mild steel sheets at a minimum thickness of 3.15 mm, conforming to grade Fe 310-O as per IS 1977-1975. All rolled sections such as angles, tees, flats, and channels must comply with IS 1977-1975. Test results require rounding consistent with IS 2-1960. Associated IS codes relevant for materials include IS 1977-1975 and IS 2-1960.

Frames for shutters up to 2 m width and 2.5 m height utilize 50 x 50 x 5 mm angles, while larger shutters use 65 x 65 x 6 mm angles. Vertical stiffeners (tees or angles) should be evenly spaced to align with sheet widths; horizontal stiffeners are spaced according to sheet length. All steel sections must be rolled per IS 1977-1975. Mild steel black sheets are tack welded to the frame interior with 25 mm weld runs spaced every 200 mm, following a welding sequence that prevents distortion.

When ordering steel sliding shutters, purchasers must supply the opening dimensions, number and size of shutter leaves, details about the surrounding construction such as wall thickness and mounting provisions, the type of roller mechanism (e.g., ball bearing or nylon rollers), the chosen covering material and finish, and any other pertinent specifications or special requirements. Bottom rollers are required to slide along the sides of the bottom channel rather than rolling on the guide.

Shutters should be coated with a red oxide primer conforming to IS:102-1962. The use of the Standard Mark is regulated under the Bureau of Indian Standards Act, 1986, and manufacturers must hold a BIS license to apply this mark. Further details and contact information for BIS offices are provided within the standard. Test results must adhere to IS 2-1960 rounding rules.