Engineering Report

Page 1 of 9
July 5, 2011 Revised Fig.2 on Page 9 on 12/13/2011
Report Revised on 01/11/2012 for Editorial Changes Only
Mr. Stewart Wentworth Project Number 111316C
QUICK MOUNT PV
936 Detroit Avenue, Suite D
Concord, CA 94518-2539
Subject: Quick Mount QBase with 6.5" Post as Used in Low Slope Mount (QMLSH-7) &
Universal Tile Mount (QMUTM) Load Testing
Dear Mr. Wentworth:
As requested, Applied Materials & Engineering, Inc. (AME) has completed load-testing the QMLSH-7
hardware. The purpose of our testing was to evaluate the tensile and shear load capacity of the QMLSH-
7 hardware attached to a commercially available 2"x4" Douglas Fir rafter.
SAMPLE DESCRIPTION
Nine (9) mockup samples were delivered to our laboratory on June 17, 2011. Mockup configuration
consisted of three 16" long rafters at 7"o.c., screwed to 1/2" Structural 1 plywood. The 7" (finished
height) Quick Mount Standoff (QMSO) hardware is attached through the plywood into the rafter with
two 5/16"x3" lag bolts torqued to 15ft-lbs. Product hardware drawings are provided in Appendix A.
TEST PROCEDURES & RESULTS
1. Tensile Strength
Three samples were tested for tensile strength on June 29, 2011 using a United Universal testing
machine. Samples were rigidly attached to the testing machine and a tensile load was applied to the
5/16"x1" machine bolt connected to the aluminum post. The samples were loaded in tension at a
constant rate of axial deformation of 0.05 in./min. without shock until failure occurred. Based on the
above testing, the average ultimate tensile load of the QMLSH-7 hardware in Douglas Fir was
determined to be 3031 lbf.
The specific gravity and moisture content of the rafter was tested in accordance with ASTM D2395,
Method A (oven-dry). The average specific gravity and moisture content was determined to be 0.436
and 20.9%, respectively. Detailed results are provided in Table I. Test setup is illustrated in Figure 1 of
Appendix B.

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