14. Firegrate.
(5).
The firegrate is to be of the Rocking type
operated by a steam cylinder as well as by a hand lever
from the footplate, and is to be similar in design to
that shown on Drgs.Nos.2.4472/42 to 47, inclusive, Regn.
No. 251/1, modified as required to suit the grate area.
15. Ashpan. The ashpan arrangement is to be similar to that
shown on Drgs.Nos.Z.4472/40,41 and 42, Reqn.No.251/1.
It is to be fitted with front and back damper doors and
sliding bottom doors, all operated by rods from the
footplate.
16. Boiler Clothing. The boiler barrel, dome, firebox, and
firebox back are to be covered with asbestos mattresses
of the "Limpet" brand manufactured by Messrs. J.W.Roberts
Ltd., Leeds, or other approved maker, and similar to
those shown on Drg.No.Z. 4472/53, Reqn.No.251/1. The
asbestos mattresses are to be in accordance with the
Crown Agents' Specification No. 100.
Clothing sheets of smooth steel, No.14 W.G. with the
usual crinoline hoops and bars and secured in position
by belts, similar to that shown on Drgs.Nos.Z. 4472/49
& 50, Regn. No.251/1 for the arrangement, and Drg.Nos. Z.
4472/51 & 52, Reqn.No. 251/1 for the details, are to be
fitted. Longitudinal joints along the firebox sides
above the centre line, and also a transverse joint along
the firebox back at the same level, with vertical joints
in the centre of the back-plate are to be provided so
that the clothing sheets can be easily removed to give
access to the firebox stays. Where washout plugs come
on the firebox back pockets to the clothing are to be
provided.
17. Smokebox.
The smokebox is to be similar in design and
detail to that shown on Drgs. Nos. 2.4472/31 and 32,
Regn. No. 251/1.