Hilti HAT 28 Mode D'emploi Original page 20

8. Increase the load until the minimum specified load is attained.
9. To relieve the load on the fastener, turn the crank counter-clockwise and push it down until the original
state is reached.
10. Now remove pull-out tester and adapter.
5.1.2 Use of the spacer
The spacer is used with the button adapters (threaded (A) or slotted (B)) or for direct testing (without button
adapter) of fasteners with a diameter of 16 mm. It consists of a cylindrical section and an M12 threaded
rod to which an M12 adapter is mounted. The cylindrical section has a slot into which the adapter for the
fastener to be tested fits.
One of the load distribution bridges is required for every test using the spacer.
In exceptional cases (e.g. fasteners on steel (X-CRM)), the adapters (M4, M5, M6, M8, M10, M12) can also
be used without the spacer for testing.
Under these circumstances, the procedure is the same as that described in the section below for testing
with adapters (M12, M16, M20).
Invariably, however, the desired results can be obtained only if the fastener was set correctly prior to
installation of the adapter.
5.1.3 Use of the threaded button adapters (M4, M5, M6, M10, M12)
For testing threaded fasteners (for example stud anchors, threaded stud fasteners).
As a rule, an M16 nut or bolt head fits directly into the loading claw foot without the need for a threaded
button adapter. In exceptional cases (e.g. X-CRM fastener on steel), the tester can be used with the
M4, M5, M6, M8, M10 or M12 threaded adapters without spacer or load distribution bridge. Remove
the tester from the bridge by removing the 4 mm screws that secure the tester to the bridge. Screw
the adapter on to the projecting thread of the fastener and slip the loading claw foot of the tester
underneath the flange of the threaded button adapter
If the projecting threaded length is long enough, the fastener can be tested without removal of the
fastened item. In this case, however, the load possibly applied to the fastener by the fastened item
has to be taken into account (e.g. deadweight), because it acts on the fastener in addition to the load
applied by the pull-out tester and increases the probability of fastener failure under test.
When installing the adapter, make sure that a full-surface connection is established between adapter
and threaded head.
5.1.4 Use of the slotted button adapter (4.5 mm, 5.5 mm, 6.5 mm, 8.5 mm, 10.5 mm, 12.5 mm)
For testing fasteners that require a connection to be made to the bolt or anchor head.
Fasteners achieve the desired / required load values only if specified tightening torques, if applicable,
were complied with on installation. The 6 slotted button adapters are suitable for testing fasteners in
the 4 to 12 mm diameter range.
These adapters are fitted under the head of the bolt or anchor in place of the item usually fastened.
They can also be used to test sleeve anchors. In the latter case, however, after being set correctly the
anchor has to be backed off slightly to accommodate the adapter. After being correctly retightened
with the adapter in position, the anchor can be tested.
This method is not recommended, however, because slackening the anchor can reduce its load value.
Make sure that the adapter is not damaged by being pressed against an uneven surface. We
recommend inserting a large washer or a steel plate between the adapter and the surface.
5.1.5 Use of the threaded rod adapters (M5, M6, M8, M10)
The adapters for M5 and M6 are primarily for testing wall ties.
On account of their special shape, the M5 to M10 adapters can be used without the button adapter
5.1.6 Use of the threaded rod adapters (M12, M16, M20)
For testing anchors with external thread or internal thread.
For testing an anchor with external thread, the adapter is screwed on to the correctly installed anchor.
Screw-in depth: at least equal to thread diameter. The adapter can then be connected directly to the tester.
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