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Unirac Technical Datasheets <br /> Delivering Value through Innovation <br />2-Piece Standoff Technical Datasheet <br />Pub 101026-1td V1.0 October 2010 <br /> 1 <br /> . . . . . . . . . . . . . . . . . . . 2 <br />2-Piece Aluminum Standoffs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <br />2-Piece Aluminum Standoff with SolarMount-I 1-flange connection . <br />2-Piece Aluminum Standoff with L-foot connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 <br />X <br />Z <br />Y <br />Standoff and Base Material: <br />•One of the following extruded aluminum alloys: 6005-T5, <br />6105-T5, 6061-T6 <br />•Ultimate tensile: 38 ksi; Yeild: 35 ksi <br />•Clear or Dark anodized <br />Weight: <br />•3” Standoff (as shown): 0 .522 pounds (237 g) <br />•Add 0 .086 pounds per inch (39 g/ inch) <br />Allowable and design loads are valid for a Unirac 2-piece <br />aluminum standoff <br />Attach with zinc plated carbon steel or stainless steel fasteners <br />Resistance and safety factors are determined according to Part 1A section 9 of <br />the 2005 Aluminum Design Manual <br />NOTE: Loads are given for the standoff only. Check load limits for lag <br />screw or other attachment method. <br />Applied Load <br />Direction <br />Average <br />Ultimate <br />Load <br />lbs (N) <br />Allowable <br />Load <br />lbs (N) <br />Safety <br />Factor, <br />W <br />Design <br />Load <br />lbs (N) <br />Resistance <br />Factor, <br />F <br />Tension/ <br />Compression, <br />Y± <br />3266 <br />(14528) <br />1089 <br />(4844)3 .00 1633 (7264) 0 .500 <br />Z Bending, <br />Applied <br />Moment* <br />559 ft lbs <br />(758 Nm) <br />250 ft lbs <br />(339 Nm)2 .24 378 ft lbs <br />(512 Nm)0 .676 <br />2-Piece Aluminum Standoffs <br />Part No. 310503, 310504, 310506, 310507, 310553, 310554, 310556, 310557, 310603, 310604, 310606, 310607, <br />310653, 310654, 310656, 310657 <br />Standoffs <br />Dimensions specified in inches unless noted <br />*Example: If the module is mounted 6” (0.5 ft) from the base of the standoff, <br />the allowable side load is 250 ft*lbs/ 0.5 ft = 500 lbs <br />1 <br />Unirac Technical Datasheets <br /> Delivering Value through Innovation <br />R <br />X <br />Z <br />Y <br />X <br />Z <br />Y <br />Reference the SolarMount-I series datasheet for 1-flange connection <br />specifications . <br />For the 1-flange connection to standoff: <br />•Use included 1 ¾” EPDM washer between the 1-flange <br />connection and standoff <br />• Assemble with included 300 series stainless steel ⅜”-16 flanged <br />hex head screw <br />•Use anti-seize and tighten to 30 ft-lbs of torque <br />Allowable and design loads are valid when components are assembled <br />according to authorized Unirac documents . <br />1-Flange connections are compatible with SolarMount-I series beams . <br />Resistance factors and allowable loads are determined according to part 1A <br />section 9 of the 2005 Aluminum Design Manual . <br />NOTE: Loads are for the connection and standoff only. Check load limits <br />for the lag screw or other attachment method. <br />Reference the SolarMount datasheet for L-foot specifications . <br />For the L- foot to standoff connection: <br />•Use included 1 ¾” EPDM washer between the L-foot and standoff <br />• Assemble with included 300 series stainless steel ⅜”-16 flanged <br />hex head screw <br />•Use anti-seize and tighten to 30 ft-lbs of torque <br />Allowable and design loads are valid when components are assembled according <br />to authorized Unirac documents . <br />L-feet are compatible with SolarMount, SolarMount Heavy Duty, <br />and SunFrame rails . <br />Resistance factors and allowable loads are determined according to part 1A <br />section 9 of the 2005 Aluminum Design Manual . <br />NOTE: Loads are for the connection and standoff only. Check load limits <br />for the lag screw or other attachment method. <br />Applied Load Direction <br />Average <br />Ultimate <br />lbs (N) <br />Allowable <br />Load <br />lbs (N) <br />Safety <br />Factor, <br />FS <br />Design <br />Loads <br />lbs (N) <br /> Resistance <br />Factor, <br />Φ <br />Tension, Y+1415 (6294) 635 (2825) 2 .23 960 (4270) 0 .679 <br />Compression, Y-1949 (8670) 873 (3883) 2 .23 1320 (5872) 0 .677 <br />Transverse, X-, downhill 635 (2825) 313 (1392) 2 .03 473 (2104) 0 .745 <br />Transverse, X+, uphill 42 (187) 20 (89) 2 .15 30 (133) 0 .705 <br />Z Bending, Applied Moment <br />559 ft lbs <br />(758 Nm) <br />250 ft lbs <br />(339 Nm) 2 .24 <br />378 ft lbs <br />(512 Nm) 0 .676 <br />Applied Load Direction <br />Average <br />Ultimate <br />lbs (N) <br />Allowable <br />Load <br />lbs (N) <br />Safety <br />Factor, <br />FS <br />Design <br />Loads <br />lbs (N) <br /> Resistance <br />Factor, <br />Φ <br />Tension, Y+1859 (8269) 707 (3144) 2 .63 1069 (4755) 0 .575 <br />Compression, Y-3258 (14492) 1325 (5893) 2 .46 2004 (8913) 0 .615 <br />Sliding, Z±1766 (7856) 755 (3356) 2 .34 1141 (5077) 0 .646 <br />Transverse, X±486 (2162) 213 (949) 2 .28 323 (1436) 0 .664 <br />Z Bending, Applied Moment <br />559 ft lbs <br />(758 Nm) <br />250 ft lbs <br />(339 Nm) 2 .24 <br />378 ft lbs <br />(512 Nm) 0 .676 <br />2-Piece Aluminum Standoff with SolarMount-I 1-flange connection <br />Part No. 05013C, 05014C, 05016C, 05017C <br />2-Piece Aluminum Standoff with L-foot connection <br />2 <br />1222 S Sycamore St - <br />201824905/3/2024