10
Table F-Glazing contd.).
Construction and Materials
2. Glass reinforced with wire not less than No. 26 3.W.G. in diameter laid to a square mesh measuring 1 inch from centre to centre of wire, and electrically welded at the inter- sections, or laid to a hexagonal mesh measuring 1 inch across the flat sides.
Thickness of Glass
Minimum thickness of
glazing in inches for
period of
2
悲
+
hours. bours, hour, houT”.
In windows, doors, borrowed lights, lanterns and skylight, glass complying with paragraph 1 or 2 of this Table shall be fixed with wood or metal fillets in panels not exceeding 4 sq. ft. in area secured to frames of metal (fixed shut) having a melting point not lower than 1,800 degrees Fahrenheit, or in timber frames (öxed shut) having a minimum thickness of 14 încives,
Glass Bricks or Blocks
In panels not exceeding 40 sq. ft. in area
with expansion joints not less then 1/10th inch per foot width of the panel at each side of the panel, and not leas than 1/10th inch per foot of the bright of the panel at the top of the panel
Table G-Doors.
11
Explanatory Note.
(Thu Note is not part of the regulations, but is intended to indicate their general purport).
These regulations---
(a) require that where works threaten the safety of a street, such
street shall be provided with adequate support;
(b) delete the reference to certain by-laws which have now been
revoked;
(c) increase the types of certain structural designs which authorized architects who are not qualified as engineers are permitted to prepare; and
(d) delete the reference to the Schedule to the London County Council By-laws in regulation 94 and incorporate the provisions of that Schedule in the principal regulations.
(Secretariat BL 1/741/521V)
Construction and Materials
Finished minimum overall thickness in inches for
4
period of 2
+
Solid timber with timber door stops continuou
round the sides and the head of the frame and having a dimension parallel to the face of the door of not less than 1 inch and at right-angles to the face of the door of not less than 11 inches........+++++++
Fire-check flush doors complying with the appropriate provisions of 3.5. 459; Part 1931
( hours. | hours. hour.bour.
***
13
COUNCIL CHAMBER,
8th April 1969.
Clerk of Councils.