This Indian Standard ( First Revision) was adopted by
the Indian Standards Institution on 29 May 1979, after the draft finalized by
the Doors, Windows and Shutters Sectional Committee had been approved by the
Civil Engineering Division Council.
Rolling shutters are being largely provided at the
entrances of shops, garages, godowns and even in workshops, power houses, miils
and factones for affording protection and safety, Rolling grills, wh?ch operate
on the same principle as rolling shutters, are being provided for showrooms and
display windows for exhibiting any goods while ensuring safety. These may also
be used in conjunction with rolling shutters where it is desired to have
certain amount of ventilation combined with safety.
- 0.2.1 This standard was first published in 1971. In this revision modifications have been made regarding the size of the guide channel and material specifications. Besides, provisions have also been made for a square bar for extra tying of bracket-plate to guide channel.
This standard contains Appendix A which requires the
purchaser to supply certain technical information at the time of placing
orders.
In the formulation of this standard due weight-age has
been given to international co-ordination among the standards and practices
prevailing in different countries in addition to relating it to the practices
in the field in this country.
For the purpose of deciding whether a particular
requirement of this standard is complied with, the final value, observed or
calculated, expressing the result of a test or analysis, shall be rounded off
in accordance with IS : 2-1960*. The number of significant places retained in
the rounded off value should be the same as that of the specified value in this
standard.
SCOPE
- This standard lays down the requirements regarding materials; fabrication and finish of metal rolling shutters and rolling grills for normal use.
TERMINOLOGY
- For the purpose of this standard, the main component parts of rolling shutters shall be defined as given in 2.1 to 2.12 ( see also Fig. 1 )
- Bottom Lock Plate - The fabricated bar inserted at the bottom of rolling shutter curtain, so as to lie against the sill, including the slide bolts, pulling handles, etc.
- Bracket Plates -The supporting plates at either end on the top, together with the U-shaped clamps supporting the entire moving mechanism of the rolling shutter.
- Crank Handle -The winding handle used for raising and lowering mechanical gear-operated rolling shutters through a bevel gear box.
- Curtain -The main apron of the rolling shutter consisting of the assembly of lath sections end-locking clips and the connecting pieces at the top.
- Uuide Channels -- The channels on either side in which the shutter moves up and down.
- Hood Cover - A sheet metal cover bent into a suitable shape for covering the roller.
- Lath Sections - The individual rolled interlocking laths or slats with which the rolling shutter curtain is assembled.
- Overall Height - The distance between the sill and the top of the bracket plate of the rollin, n shutter plus an allowance of not more than 150 mm.
- NOTE-The allowance is meant for taking care of the extra curtain height required for partly covering the roller in the closed position.
- Overall Width- The outer distance between the backs of the two guide channels of the roliing shutter.
- Puiling Hook - The steel rod shaped into a hook at one end and into a ring at the other, used for raising and lowering self-coiling type rolling shutters.
- Roller -.The entire rolling portion at the top of the shu ter including the suspension shaft, the pulleys, the springs and ball bearing, if any.
- Stopper Height - The stopper height of a rolling shutter shall be the height as measured from the sill to the bottom of the lock plate, when the rolling_shutter is in the full open position.
