01 April 2001
shear keys integral with the fitting, most of the shear stresses are resisted by the
concrete or grout base. This is not the case on structures constructed of timber or steel
where all loads are resisted by the fasteners. If the fitting is set in concrete, the
fasteners need only to be tested in tension. In cases such as timber structures or steel
structures, the fasteners are readily accessible and can be removed for inspection,
eliminating the need to load test. Bolts that have their anchorage in concrete should be
load tested in tension using the procedures outlined in ASTM E 488, Standard Test
Methods for Strength of Anchors in Concrete and Masonry Elements
. It should
that tension and testing of fasteners will not provide a comprehensive indication of load
capacity of the system.
The bolt testing procedure is:
Remove the grout and nuts from the bolts.
Pull-test each bolt to 110% of its working load using a pull test rig.
The pull test procedure should follow the procedure for testing
anchors described in ASTM E 488, Standards Test Methods for
Strength of Anchors in Concrete and Masonry Elements
If test is successful, reinstall the nuts and grout to the design
If bolt fails, take out of service and replace as soon as possible.
Results. Load testing results are reported on the form provided in Figure
B-1. Remove any mooring hardware that does not pass the pull test and plan and
allocate resources for appropriate replacement.
Levels of Load Testing
Level I. Bolt pull test (tension). Bolts are tested individually to
determine tensile strength of the bolt and anchorage.
Level 2. Indirect line load. Hardware pull-tested with actual line force but
not in actual direction of mooring line due to cost and convenience, e.g.,
bollard-to-bollard pull. This level of testing will confirm the strength of the
mooring hardware system including the casting, fasteners, and structure.
Level 3. Load applied in actual direction of mooring line force. This
will confirm the working load of the entire system including base
structure, anchor bolts and fitting.
Test Prerequisites. Area adjacent to fitting to be tested should be open
and clear of vehicles, vessels, or other equipment and associated personnel.
Prior to testing, a review should be conducted of the test equipment by
qualified personnel to determine its adequacy for the loads to be applied.