Manual of Purpose-Made Woodworking Joinery

(Barry) #1

130 Designing and making stairs to current building regulations


rectangular shapes of the handrail to be drawn at each
end. However, note that the centre of the twisted
handrail has to be altered to suit the stair’s plumb
bevel.
When marked on both faces, as illustrated, the
wreath was fixed firmly to a wedge- shaped block that
had been made to the stair- pitch angle; (countersunk
screw- holes had been drilled in the block’s underside,
so that two fixings could be made to the underside of
the wreath). With the wreath now positioned in its
correct vertical plane, the marked outer- edges were cut
by pivoting the wide wedge- shaped block very care-
fully around the narrow bandsaw.
After cleaning up the edges with spokeshave
planes, the so- called falling lines (helixes) were pen-
cilled in on each side – to depict the top and bottom
curvature of the wreath – and these twisting shapes
were removed with a traditional bow saw. This is a
challenging task that requires constant observation on
the two separated and twisting lines. Again, the sawn
surfaces were cleaned up with spokeshaves. Finally,
when satisfied with the basic rectangular shaped
wreath (and not before), finger- gauged pencil lines are
made and the actual handrail shape is applied – again
with the aid of spokeshaves and cabinet scrapers, etc.

thereby lengthened. Then the wreath is cut carefully
to the double- curvature shape, ideally on a narrow
bandsaw machine and its sides are planed to a fair
finish with spokeshaves and/or a sanding bobbin and
tabled disc- sander.
Next, the two tangent lines (previously trans-
ferred from the face mould) are squared down and
marked on the ends of the wreath, as illustrated
in Figure 6.59. These small crosses pinpoint the
centre-lines of the level handrail at the narrow end
and the twisted handrail at the wreath’s wide end.
And they control the pencilled outline of the plain,


Wedge-shaped
cutting block

Wreath in position on block,
for vertical sawing of outer edge.

Figure 6.60 (a) Wreath in position on block,for vertical
sawing of outer edge


Wedge-shaped
cutting block

Figure 6.60 (b) Wreath upside down on block, for verti-
cal sawing of inner edge

Figure 6.59 The handrail wreath being marked on its top
and bottom faces with the face- mould template.

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