Twist-On™ Groutless Test Data
1. Testing the Twist-On™ Hook
In this test the anchor was basically clamped in a vice, allowing approximately
6" free extension from the anchorage point to the center of the 1"
x 1" square bar, through which the forces were applied. From this test
we obtained the following results:
Tension Test All forces given in Lb.'s
|
Sample No.
|
T-1
|
T-2
|
T-3
|
T-4
|
T-5
|
Average
|
|
Peak Elastic Load
|
---
|
2,200
|
2,120
|
2,116
|
2,150
|
2,,146
|
|
Ultimate Load
|
3,260
|
3,370
|
3,162
|
3,312
|
3,594
|
3,412
|
Shear Test All forces given in Lb.'s
|
Sample No.
|
S-1
|
S-2
|
S-3
|
S-4
|
S-5
|
Average
|
|
Peak Elastic Load
|
595
|
422
|
533
|
594
|
473
|
523
|
|
Ultimate Load
|
953
|
871
|
888
|
913
|
969
|
919
|
Compression Test All forces given in Lb.'s
|
Sample No.
|
C-1
|
C-2
|
C-3
|
C-4
|
C-5
|
Average
|
|
Ultimate Load
|
5,810
|
5,800
|
5,340
|
5,210
|
5,480
|
5,528
|
2. Testing the anchorage of the Groutless Anchor
Bar System, when embedded in a mortar bed of 12" hollow masonry
block wall. Grout was not used to fill the cells at the anchor
For the test, hollow Concrete Masonry Units were used conforming to ASTM C-90
and Mortar Type S conforming to ASTM C-270.
In this test, the anchor was embedded in the masonry mortar bed, allowing approximately
6" free extension from the face of the masonry wall to the center of the
1" x 1" square bar via which the tension and compression force was
applied. The shear force was applied directly on the anchor bar, very close
to the face of the masonry. From this test, the following results were obtained.
The shear and compression test failure occurred in the mortar joint bond between
the anchor and the CMU. The tension test failure occurred by yielding of the
anchor steel.
Tension Test All forces given in Lb.'s
|
Sample No.
|
T-1
|
T-2
|
T-3
|
T-4
|
T-5
|
Average
|
|
Ultimate Load
|
3,863
|
3,500
|
3,500
|
3,600
|
3,500
|
3,592
|
Shear Test All forces given in Lb.'s
|
Sample No.
|
S-1
|
S-2
|
S-3
|
S-4
|
S-5
|
Average
|
|
Ultimate Load
|
-
|
2,070
|
2,500
|
2,200
|
2,184
|
2,238
|
Compression Test All forces given in Lb.'s
|
Sample No.
|
C-1
|
C-2
|
C-3
|
C-4
|
C-5
|
Average
|
|
Ultimate Load
|
4,910
|
3,660
|
4,140
|
3,830
|
3,050
|
3,918
|
Full test reports prepared by Wiss, Janney, Elstner Associates, Inc. are available upon request.
Copyright 2003 Heckmann Building Products. I-Type and T-Type Groutless Anchors are Patent Pending