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IRONWORK REPAIRS IN TIMBER-FRAMED BUILDINGS.
Why do timber frames
2.7 Poor workmanship.
Poor workmanship is more
likely later in the history of the house when poor quality alterations using
second-rate (Fig. 2. 14) or second-hand materials was common. Poor workmanship
here can be defined as the loss of the quality carpentry and joinery that
typified the early fully jointed timber frames. From the 17th century even
prestigious buildings suffered from the dilution of the trade as quality joinery
gave way to the wholesale and often unskilled, hammering of wrought iron nails
and spikes through ill selected timbers.
An extreme example of low caste workmanship in Forge House at Castle Camps,
Cambs. This pseudo-cruck constructed door frame with every scantling pinned
in with wrought-iron nails gives an idea of the type of work prevalent from
the early 1700's.
The nailed in timbers
spring out or the fixings corrode leading to failure from disconnection. The
timber sections can be too slight to bear the loads later required.
2.8 Structural redesign
leading to weakening.
Often in the history
of a house the building is remodelled to fit the fashion of the day. Thus
mediaeval halls, once open to the roof with an open hearth in the floor, commonly
will have an inserted firestack and first floor and then a garrett room with
dormers. Doorways may be moved and new openings made. Almost certainly the
window openings will be altered to accommodate sash and casement windows.
The roof structure could be seriously altered, purlins cut, collars and crown
posts removed and rebates cut into ties for door openings. (Fig 2.15).
The Wheelwrights Cottage, Castle Camps, Cambs. The insertion of a floor with
dormers into a thatched cottage which was probably originally a kitchen to
a bigger house was potentially a disaster. Copious ironwork was amateurishly
inserted to arrest its collapsing floors and splaying walls.
All these kind of destructive
alterations where timber is removed or sections reduced require adequate bracing
to prevent movement. Ironwork is often used at the time of alteration, or
later, to check movement.
Origins of ironwork repairs