Drill a 20mm hole through
the cill, on the centre line, at the intersection
of each load bearing corner.
It is important
that the jack base is secured on a solid and
the cill over the jacks and apply sealant
in the 20mm hole around the jack thread.
the lock nut and nut down the jack thread
almost to the cill and add the baypole/baypost
The PVC-u sleeving
should be cut away to allow access to the
nuts. This relief should be from the bottom
of the sleeving upwards 40-45mm but should
be cut across short of the centre line.
baypole/baypost to a length 40mm less than
the distance from the top of the cill to
the top of the opening.
is now placed on the locator with the sleeving
resting on the cill and a spreader plate
located at the top. The nut and locknut
should now be accessible through the cut
out in the sleeve.
must be adjusted so as to be truly vertical
and then the jacking load can be applied.
This is carried out by screwing the nut
upwards and when the required load is reached
the lock nut is tightened to the nut. Besides
being secured at the top and bottom the
adjacent frames should also be fixed to