Estimating Glass Measurements

It must be borne in mind that all fractional parts of inches are charged as full inches. Those plates which are irregular shaped should be charged as the squares required to cut them from and classed by themselves. When measuring sheet glass which weighs 15, 21 or 26 ounces per superficial foot, the contents of each pane should be stated as not above 11 feet, the understanding being that no pane shall exceed 50 inches in length, and in width 36 inches; when above 11 to 21 feet, the contents should be stated in steps of 2 feet, while the length may vary in contents from 55 to 80 inches and the width from 38 to 48 inches.

Where the sheet glass weighs 32, 36, or 42 ounces per superficial foot, the contents of each pane may be noted as containing not above 8 feet, the understanding being that there shall be no pane exceeding in length 45 inches or in width 34 inches; above 8 feet up to 14 feet, the steps upward to be noted every 2 feet, while the length varies, according to contents, from 50 to 60 inches, and the width from 36 to 40 inches; above 14 to 19, the contents to be noted in steps of 1 foot, while the length may vary, according to the contents, from 60 to 85 inches, and the width from 40 to 47 inches; all sizes which are above this to be mentioned in detail for each pane, as generally few sizes above 19 superficial feet are made.

The measurement of crown glass should be taken the extreme size and tabulated as best, second, third, fourth, or coarse quality; when wanted more than the ordinary thickness made, it should be distinctly specified, and the fractions of inches, as usual, to be charged as full inches. When estimating or measuring crown glass with private label tape measures, distance measuring wheels, or tanking gauge tapes, the contents of each pane should be stated as under 2 superficial feet, and every foot upward thereafter to 5 feet; above 5 feet superficial contents the size of each pane should be stated separately.

In estimating all kinds of ornamental glass (whether it be plate, sheet or crown) the measurement of the glass should be as already described, and the class of ornamentation to be minutely detailed. When colored glass is only 6 inches or under 6 inches broad, it should be measured by the lineal foot; but when above 6 inches in breadth it should be measured by the superficial foot, and if ornamented, besides being colored, the ornamentation should be accurately detailed.

Where there is lattice-work and glass they should be measured together with appropriate tape measures and not by the pane; but in measured compartments or lights each of these being measured at the extreme size, while the fractions of inches are to be charged as full inches. The glass in tracery heads or the like should be classed separately, and the price should include for any moulds that may be required. In the pricing of lattice-work it should include for iron stiffening rods and copper wire fixing; also, for pointing and painting, the diameter of the rods and their distance apart from each other to be particularly stated.

The glass of those windows which have small panes, each containing less than 2 superficial feet of sheet or crown glass, and separated only by astragals, should be measured within the frames, but over the astragals, the fractional parts at astragals not to be counted, but the fractions at frames to be counted as full inches. When glass is cut to the angle or circle, it should be measured by superficial foot, and described as such and classed separately. Bent glass also should be detailed separately, and price should include moulds that may be required. The prices of glass should include priming, puttying, pins, catches, and work glazing.