BARBETTE
STRONGBACK
STRONGBACK
BULKHEAD
BULKHEAD
THIS IS THE SIMPLEST AND
STRONGEST SHORING STRUCTURE.
THE USUAL METHOD OF INSTALLING
SHORES IS BY A TRIANGULATION SYSTEM.
THE BASIC STRUCTURE IS
REPEATED AS OFTEN AS NECESSARY.
WHEN OBSTRUCTIONS PREVENT USE
OF THE TRIANGULATION SYSTEM
THIS METHOD MAY BE USED.
THIS IS BAD
STRONGBACK
A
C
STRONGBACK
B
BULKHEAD
BULKHEAD
D
THE SHORE IS UNDER
CROSS-AXIAL PRESSURE
E
AND MAY SNAP!
OBSTRUCTION
DCf0817
ADDITIONAL STRENGTH IS AFFORDED BY SHORES B
AND C. HORIZONTAL SHORE B IS SUPPORTED BYD
AND A, AND IS BRACED AGAINST A UNIT OF MACHINERY BY
MEANS OF E.
Figure 8-17. Shoring against horizontal pressure.
clear the handwheel. A basic rule is to put as many
pressure on the member being shored. Use as few
points of pressure on the closure as there are dogs on
wedges as possible to obtain satisfactory results.
the closure.
Always drive the wedges in uniformly from both sides
so that the shore end will not be forced out of position.
The success of any shoring job depends largely on
Lock the wedges in place so that they will not work
the way in which the timbers are wedged. As the
loose and cause the shoring to slip. Figure 8-20 shows
shoring job progresses, check carefully to ensure that
all of the wedges are exerting about the same amount of
one method of locking wedges in place.
8-14
