Hydrajaws 2000 - Hydrajaws Wall Tie Tester Kit Guide; Site Testing of Wall Ties Overview; Wall Tie Load Application Procedure

16
5. WALL TIE TESTER KIT
KIT CONTENTS:
• 2000 model Medium Duty Tester with
xedGaugeto5kN*
• Wall Tie Spacer Bridge
• M5 & M6 Wall Tie Adaptors
•CalibrationCerticate
• Padded Carrying Case
* Some models have removable gauge and
coupler system
SITE TESTING OF
WALL TIES
The purpose of carrying out site tests on
wall ties is either as part of a site survey to
investigate the suitability of the base
material for the use of a particular tie or
during the installation of the ties to verify
the quality of the installation.
Fig 24
InaccordancewiththeBBArecommendationonRemedialwalltiesitisrequiredthat
therst3tiesinabuildingshouldbetestedfollowedby1tieinevery20installed.BRE
Digest401‘Replacingwallties’speciesthattheinnerendoftherst20tiesinstalledon
a contract should be all proof tested and that a reducing rate of testing is required for the
remaining ties, for 21 to 250 ties 10% should be tested, for 251 to 1000 ties 5% should be
tested and for more than 1000 ties 2.5% should be tested.
LOAD PROCEDURE
Generally the loading procedure for
testing wall ties is the same for both ends
of wall ties regardless of whether they are
mechanicalandchemicalxings,sothe
loading procedures which follow. Connect
the wall tie adaptor complete with the M12
threaded button adaptor to the end of the
wall tie, taking care not to tighten the outer
leaf expansion nut (g 24).
With the test meter securely attached to
the Bridge, adjusting the length of the legs
on the loading bridge and the position of
the button adaptor if necessary, pass the
adaptors through the keyhole slot in
the loading bridge and ensure that the
button adaptor is centred in the test
meter (g 25).
Use the levelling screws on the bridge
to take up the slack in the system and to
ensure that the test meter is axially
aligned with the wall tie under test.
DO NOT LOAD THE
TIE WITH THE
LEVELLING SCREWS.
a
b
a
b
1
2
3
For inset wall ties - ensure width of hole (a)
is wide enough to accommodate the wall
tie adaptor and is set deep enough (b).