Edmonton, Alberta Department of Civil Engineering March 14, 1994 Mr. Wolf Wilbert, President Wolf Creative Design Ltd. 10616 – 147 Street Edmonton, Alberta T5N 3C7

TEST RESULTS   Table 1 Table 2 Table 3 Table 4

Dear Wolf:

Re: Wolf's Hook Test Results

As per your request, two post to beam connections were tested on February 9, 1994 at the I.F. Morrison Structural Laboratory, Department of Civil Engineering, University of Alberta. The connections, supplied by you, were assembled from spruce and pine glued laminated timber using the Wolf's Hook and a traditional welded steel beam hanger, respectively.

The test setup is shown schematically in Fig. 1 along with specimen dimensions. The posts were first fixed to a steel stub column, which was pretensioned to the strong floor in the Lab. A load was then applied to the beam through a hydraulic jack at 542 mm away from the face of the post. A roller was used at the jack location to maintain the vertical of the applied load. A load cell was attached to the hydraulic jack to provide accurate load readings. Three devices, two dial gauges and one rotational gauge ( as shown in Fig. 1), were used to provide connection rotations. It was found that the dial gauge readings gave similar results as those of rotational gauge.

The load readings, calculated moments (load x 542 mm), and rotation readings from the rotational gauge are listed in Table 1. The moment versus rotation curves of two specimens are shown in Fig. 2. The maximum moment capacities obtained were 1.40 kN.m and 2.85 kN.m for beam hanger and Wolf's Hook, respectively. A sharp reduction of moment capacity was observed after the beam hanger reached its capacity. However, large rotational capacity was obtained from the Wolf's Hook connection. The test of Wolf's Hook was terminated due to the large rotation.

Best regards.

Sincerely yours,

J.J. Roger Cheng, Ph.D., P.Eng.

Associate Professor of Civil Engineering