Anchor Test Results
4.1 Dynamic Test
For the 16M (1045) anchors, a 7 foot tall, 390 pound switching bay frame was loaded with an additional 650 pounds. Three 150 pound weights were loaded toward the bottom and two 100 pound weights were loaded toward the top of the frame. An additional 100 pounds was loaded on top of the frame to simulate the dynamic effects of overhead cable weight. The frame possessed a foot print in the front to back direction of 18 inches, and is designed to accept 16 mm anchors. This test configuration is representative of a heavily loaded switching frame in a Zone 4 location.
Dynamic tests of the 16M (1045) Anchors were performed in 3500 psi concrete. The torque value used for testing was 105 ft-lbs. During the testing, the BSI 16M (1045) anchors had sufficient strength and dynamic resistance to restrain the switch frame. Anchors which loosened during the shaking were re-tightened upon conclusion to their original torque values. The maximum deflection at the top of the frame was less than 3.0 inches relative to the base.
4.2 Static Tests
The following Table summarized the static test data for the BSI 16M (1045) anchors:
Note: Tests performed in 3,400 psi concrete using 2% reinforcing rod and 3/4 inch aggregate.
4.3 Conformance Summary
(R-109) Concrete expansion anchors used to base mount framework to the floor shall meet the following requirements:
Maximum nominal embedment depth of 3.5 inches (88 mm).
Maximum bolt diameter of 0.5 inches (12 mm).
Bellcore Comment: The BSI 16M (1045) anchor utilizes a 16 mm bolt diameter and an embedment depth of 95 mm.
Due to its larger diameter and deeper embedment depth, the 16M (1045) anchor DOES NOT CONFORM to the TR63 anchor dimensional requirement. The TR-63 anchor dimensional requirement is intended to protect telephone network centers from damage resulting from installation of anchors larger than standard concrete floors can safely accept. This non-conformance indicates the 16M (1045) anchors may be unsuitable for installation in some telephone network centers.
(O-110) Concrete expansion anchors used to base mount the framework to the floor should be suitable for earthquake (dynamic) applications, as specified by the manufacturer.
Bellcore Comment: The BSI 16M (1045) anchors demonstrated acceptable dynamic performance in laboratory testing. Anchors which loosened under the large dynamic loads were tightened back to their original torque values.
The 16M (1045) anchor CONFORMS with TR-63 dynamic rating objective for applied Zone 4 earthquake loads in 3500 psi concrete.
Bellcore Comment: With respect to the BSI's published specifications, reproduced in Appendix A, Bellcore has determined that:
The 16M (1045) anchor DOES NOT CONFORM with BSI's published specifications for Tensile Strength.
The 16M (1045) anchor DOES NOT CONFORM with BSI's published specifications for Shear Strength.