|
|
Metal staircase spiral staircase cast iron
spiral staircase
Britannia Architectural Metalwork Ltd
Metal staircase spiral staircase cast iron
spiral staircase.
Ornate Cast Iron Straight & Spiral Staircases
Britannia’s standard range of ornate cast iron
straight staircases are replica Victorian Designs modified to
accommodate the standard widths required by today’s builders. The
staircases can be supplied either ready to assemble complete with
all screws and bolts etc. or just the castings for assembly by the
client’s own metalworkers. In addition to this standard range,
Britannia can make specially designed staircases to order.
The Range
The standard tread design is based on the rose pattern which was in
common use during the Victorian period. The tread is designed to be
side fixed to the stringers and is available in five widths as
follows: 600mm, 800mm, 900mm, 1000mm and 1100mm wide.
The spirals are made in 1200mm, 1500mm & 1800mm diameters.
Tread Dimensions
The dimensions of the treads referred to in the diagram below are
given in the table on the right.
Table of Tread Dimensions:
600mm x 240mm
800mm x 240mm
900mm x 240mm
1000mm x 240mm
1100mm x 280mm
landing plate
1050mm x 240mm
Balusters
The standard baluster used with both our spiral and straight
staircases is our pattern A01 (or tulip baluster). These balusters
are available in the sizes illustrated which are designed so that
they can be modified to accommodate any balustrade height between
900mm and 1100mm so as to comply with the Building Regulations. The
majority of other Britannia balusters can be specially adapted for
use with the staircases.
Finishes
The standard finish for all staircases is one coat of oxide
primer ready for site decoration.
Rise and Going
The rise and going of the staircase can be adjusted so as to
accommodate most applications by changing the pitch of the stringers
and the position of the treads and their overlap within the
stringers (see sketch).
Stringers
The treads are supported on two mild steel stringers which
transfer the weight of the staircase to the buildings structure. The
fixing gusset plates at the top and bottom of these stringers can be
modified to suit site conditions.
Landings
Cast decking for landings of the same width as the stairs can be
made up of the same design of casting but without the upstand.
Britannia also manufacture a matching decking plate 1050mm long
which is designed to rest on a steel framework.
|
|
