Front Cover of Volume 14
Volume 14
by R Greenhalgh (Ed)
Published by Pitman & Sons Ltd
16th April 1927
No ISBN number
Extract from pages 648-650
There are many different forms of the arch in use at the present time, built up by a combination of different curves
The setting out of these will not present any great difficulty, once the student is thoroughly acquainted with the methods of connecting the different curves with their centres
Arches can be divided into three classes:
The setting out of these will not present any great difficulty, once the student is thoroughly acquainted with the methods of connecting the different curves with their centres
Arches can be divided into three classes:
- Rough arches
- Axed arches
- Gauged arches
Semicircular arch
Segmental arch and
Flat (or camber) arch
One CentreSegmental arch and
Flat (or camber) arch
Pointed or Gothic arch
Two CentresSemi-elliptical arch
Three, five, sevenand upwards
Tudor arch
Four CentresAxed Arches
This term is applied where the voussoirs are cut to a wedge-shape, by means of the boaster, and trimmed to
an approximately true bed with the scutch. They may be rough axed, or fine axed, according to the class of work
The former usually applies to arches of sharp curvature, where strength is required and appearance is of little or no consequence
Where both appearance and strength are essential, and the arch is an ornamental feature, fine-axed work is generally used
Sem-circular brick arch
Image fromThe Heritage Directory
The arrises of the bricks are cut true and sharp, their beds being trimmed to a true surface and finished with a few rubs on the rubbing stone, so that the voussoirs can be bedded with a fine joint, usually about ⅛" to ¼", approx 5mmImage fromThe Heritage Directory
Gauged Arches
Where a still finer finish is required, or special mouldings are to be cut on the face of the arch, rubber bricks are cut to shape by means of a wire saw, and the beds and arrises finished on the rubbing stone
The arch is then set in lime putty with a 1/32" joint, which is only 1mm
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