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The lath sections shall be made of an 18 gauge (1.25 mm) section with a 78 mm profile height for curtains. The lath sections shall be rolled so that they have interlocking curls at both edges and a deep corrugation in the center with a bridge depth of 16 mm to provide sufficient curtain stiffness to withstand manual pressure and normal wind pressure during the installation of the curtains. Each lath segment must be made from a separate piece of material that is not joined by welding. When interlocked, the lath section should have spacing between rolling centers of 75 mm when the sections are joined together. For each alternate lath segment, malleable cast iron or mild steel clips firmly riveted at either end should be installed, allowing the lath section to be locked at both ends and preventing the individual lath sections from moving laterally.
The clips must be constructed in such a way that they conform to the contours of the lath sections. At the bottom of the rolling shutter, a mild steel plate 3.15 mm thick should be used, which shall be strengthened by a mild steel angle of 35 X 35 X 5 mm at the bottom of the plate.
Channels of Instruction
These should be made of mild steel deep channel section, which may be rolled, pressed, or built-up (fabricated) to meet the requirements. The thickness of the sheet that is utilized must not be less than 3.15 mm in thickness. A suitable amount of space between the curtain and the inner surface of the guide should be provided by the guide’s overall depth. Unless otherwise specified, the curtain for rolling shutters up to and including 3.5 m in width must protrude into the guide by at least 40 mm and by at least 60 mm for higher widths. There must be a minimum of 10 millimeters of space between the guiding wall and the curtain’s end clips.
Shaft with a Counter-Weight
The construction of the roller’s suspension shaft should be made of steel pipe that meets the standards of is: 1161 for high load applications.
When the rolling shutter is in operation, the diameter of the shaft must be big enough to avoid deflection the shaft.
The shaft’s deflection should not be higher than 5 millimeters per meter of the rolling shutter’s width unless otherwise specified.
In order to ensure proper fit, the dimensions of the steel pipe should be selected in accordance with IS 6248.
While raising the widths and heights of the pipe, the diameter of the pipe is raise; however, when designing the pipe diameter, the deflection limit should be taken into consideration.
It is important to attach the pipes of the suspension shaft, which are attached to the brackets of the suspension system, to the suspension system’s mounting points.
Drive that has been operate
It is recommend that an electric motor operating at 400/440V3 phase, 50 cycles alternating current be use to operate these.
An integrat safety brake and a double circuit limit switch that is compatible with the control switch, as well as a three-station push button with remote control and a mobile control function that enables switching between stations. Push-button control should be used to operate the motor, with a minimum of three buttons labeled “up,” “down,” and “stop” on the control panel to operate the motor.