QMHSS Engineering Report

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March 18

, 2015

Mr. Bryan Espiritu Project Number 114490C

QUICKMOUNT PV

2700 Mitchell Dr., Bldg. 2

Walnut Creek, CA 94598

Subject: Laboratory Load Test of the QMHSS with 6061 Base Plate

Dear Mr. Espiritu:

As requested, Applied Materials & Engineering, Inc. (AME) has completed load-testing the QMHSS

hardware. The purpose of our testing was to evaluate the tensile (uplift), compression, and lateral

(perpendicular and parallel to rafter) load capacity of the QMHSS attached to a 2"x4" Douglas Fir rafter

using two 5/16"Ø x 3.5” lag bolts .

SAMPLE DESCRIPTION

Samples were assembled in our laboratory between January 17

and January 23

, 2015. Mockup

configuration consisted of three 16" long rafters at 4.5"o.c., screwed to 1/2" Structural I plywood. The

QMHSS is attached through the plywood into a rafter with two 5/16”ø x 3.5” fasteners installed at the

farthest point on the 6061 base plate. QMHSS and 6061 base plate configurations are provided in

Appendix A.

TEST PROCEDURES & RESULTS

1. Compressive Load Test

A total of six tests were conducted for compressive load capacity on January 17

, 2015 using a United

Universal testing machine. Samples were rigidly attached to the testing machine and a compressive load

was applied to the hook. The samples were loaded in compression at a constant rate of axial deformation

of 0.09 in. /min. without shock until the hook was bent and came in contact with the test board;

displacement at maximum load was recorded. Based on the above testing, the average maximum

compression load of the QMHSS attached to a 2"x4" Douglas Fir rafter using two 5/16”ø x 3.5” lag

bolts was determined to be 765 lbf. Detailed results are provided in Table I. Test setup and mode of

failure are provided in Appendix B, Figure 1.

The specific gravity and moisture content of the rafters was tested in accordance with ASTM D2395,

Method A (oven-dry). The average specific gravity and moisture content was determined to be 0.454

and 9.2 %, respectively.

Summary of content (16 pages)

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March 18th, 2015 Mr. Bryan Espiritu QUICKMOUNT PV 2700 Mitchell Dr., Bldg. 2 Walnut Creek, CA 94598 Subject: Project Number 114490C Laboratory Load Test of the QMHSS with 6061 Base Plate Dear Mr. Espiritu: As requested, Applied Materials & Engineering, Inc. (AME) has completed load-testing the QMHSS hardware.
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Mr. Bryan Espiritu QUICKMOUNT PV Laboratory Load Testing of the QMHSS with 6061 Base Plate March 18th, 2015 Project Number 114490C 2. Tensile (Uplift) Load Test A total of six tests were conducted for tensile load capacity on January 15th, 2015 using a United Universal testing machine. Samples were rigidly attached to the testing machine and an uplift load was applied to the hook. The samples were loaded in tension at a constant rate of axial deformation of 0.09 in. /min.
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TABLE I COMPRESSIVE LOAD TEST RESULTS QMHSS- 6061 BASE PLATE PROJECT NUMBER 114490C FAILURE MODE RAFTER SPECIFIC GRAVITY RAFTER MOISTURE CONTENT (%) 2.1 Hook Contact w/ Plywood 0.377 9.2 780 2.0 Hook Contact w/ Plywood 0.603 9.7 C-3 780 2.2 Hook Contact w/ Plywood 0.500 9.8 C-4 780 2.3 Hook Contact w/ Plywood 0.317 8.4 C-5 765 2.0 Hook Contact w/ Plywood 0.374 9.0 C-6 786 2.1 Hook Contact w/ Plywood 0.522 9.0 AVERAGE 765 2.1 .. 0.454 9.
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TABLE II TENSILE (UPLIFT) LOAD TEST RESULTS QMHSS- 6061 BASE PLATE PROJECT NUMBER 114490C SAMPLE ID MAXIMUM UPLIFT LOAD (lbf) DISPLACEMENT AT MAXIMUM LOAD (in.) FAILURE MODE RAFTER SPECIFIC GRAVITY T-1 1182 3.2 Broken Hook 0.444 RAFTER MOISTURE CONTENT (%) 7.7 T-2 1175 3.3 Broken Hook 0.476 7.6 T-3 1056 3.0 Broken Hook 0.459 9.4 T-4 1140 3.0 Broken Hook 0.472 7.2 T-5 1164 3.6 Broken Hook 0.444 7.0 T-6 1166 3.1 Broken Hook 0.500 8.5 AVERAGE 1147 3.2 .. 0.466 7.
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TABLE III SHEAR (LATERAL) LOAD TEST PARALLEL TO RAFTER TEST RESULTS QMHSS- 6061 BASE PLATE PROJECT NUMBER 114490C SAMPLE ID MAXIMUM LATERAL LOAD (lbf) DISPLACEMENT AT MAXIMUM LOAD (in.) FAILURE MODE RAFTER SPECIFIC GRAVITY Para-1 787 2.1 Broken Hook 0.481 RAFTER MOISTURE CONTENT (%) 9.8 Para-2 805 1.4 Broken Hook 0.431 8.7 Para-3 839 1.9 Broken Hook 0.425 8.6 Para-4 834 1.8 Broken Hook 0.520 9.7 Para-5 853 2.0 Broken Hook 0.396 8.4 Para-6 824 1.9 Broken Hook 0.379 8.
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TABLE IV SHEAR (LATERAL) LOAD TEST PERPENDICULAR TO RAFTER TEST RESULTS QMHSS- 6061 BASE PLATE PROJECT NUMBER 114490C SAMPLE ID MAXIMUM LATERAL LOAD (lbf) DISPLACEMENT AT MAXIMUM LOAD (in.) Perp-1 1616 4.6 Perp-2 1645 4.8 Perp-3 1382 4.2 Perp-4 1225 3.6 Perp-5 1627 4.8 Perp-6 1405 3.7 AVERAGE 1483 4.3 Page 7 of 16 Broken Hook at Base Plate. Broken Hook at Base Plate. Broken Hook at Base Plate. Broken Hook at Base Plate. Broken Hook at Base Plate. Broken Hook at Base Plate. 0.
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REFERENCES AC13-2010, “Acceptance Criteria for Joist Hangers and Similar Devices”, ICC Evaluation Service. AC85-2008, “Acceptance Criteria for Test Reports”, ICC Evaluation Service. ASTM D1761-2006, “Standard Test Methods for Mechanical Fasteners in Wood”, ASTM International. ASTM D2395-2007, “Standard Test Method for Specific Gravity of Wood and Wood-Based Materials”, ASTM International.
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APPENDIX A Page 9 of 16
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FIGURE 1 QMHSS- 6061 BASE PLATE PROJECT NUMBER 114490C Page 10 of 16
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FIGURE 2 QMHSS- 6061 BASE PLATE PROJECT NUMBER 114490C Page 11 of 16
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APPENDIX B Page 12 of 16
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FIGURE 1 QMHSS- 6061 BASE PLATE COMPRESSIVE LOAD TEST SETUP PROJECT NUMBER 114490C Figure 1a. Test Setup Figure 1b.
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FIGURE 2 QMHSS- 6061 BASE PLATE TENSIL (UPLIFT) LOAD TEST SETUP PROJECT NUMBER 114490C Figure 2a. Test Setup Figure 2b.
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FIGURE 3 QMHSS- 6061 BASE PLATE SHEAR (LATERAL) LOAD TEST PARALLEL TO RAFTER PROJECT NUMBER 114490C Figure 3a. Test Setup Figure 3b.
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FIGURE 4 QMHSS- 6061 BASE PLATE SHEAR (LATERAL) LOAD TEST PERPENDICULAR TO RAFTER PROJECT NUMBER 114490C Figure 4a. Test Setup Figure 4b.