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_ - �U55 �NGIN���ING GpOU�, I NC , <br /> Date: Novemtxr 6,2000 g000 7-�4' <br /> To Whom Ct May Concem <br /> RE: Advenced Support Products Base and Assembly <br /> I am 1 sttuct�aal engineering consultant to Advanced Support Products, Inc. T have performed <br /> analysis of thcir product both in the United States and iu Europe. T6e ASP base is structurally <br /> designed to distribute weight unifotmly ova the roofing membrane to meet the pounds per <br /> square inch tequiremtnts set by all roo5ng manafactw�ers. The base is 17 inches in diameter <br /> resulting in 227 square inches of bearing surface. <br /> The platform is supported on HSS 2x2x1/4 columns. The columns are supported on sn <br /> adjustable assembly. The columns are welded to a 3/16-inch flat plate. The 3/16-inch plate is <br /> fastened to a '/. inch diameter :ill-tluead rod with two nuts. The all-thread rod is welded to <br /> aaother 3/16-inah plate wluch hes a 1-5/8 inch squere dowel weldcd W the opposite side. The <br /> dowel fits inta the HDPE base via a prcfotmed opening. All s�uctuxal sttel is A36 material. All <br /> wclds are AWS certi$ed.All welds for Los Angeles will be performed in a shop approved by the <br /> city. <br /> The ASP base has been tested at Portland State University to meas�ue performance under seismic <br /> loading.The results show good performence.Further testing is planned. <br /> The ASP base has also been tested for coet�cient of friction by Frofessional Servia lndustries, <br /> Inc. in their laboratory in PiHsbwgh, Pa Tbu�ee conSgutations were tesbod on foor different <br /> surfeces, <br /> The three assembCies wero; <br /> • HDPE Base <br /> • I-IDPE Base on Rui;berized Bearing Pad(Epoxied to the base) <br /> ■ HDPE Base on Rubberizod Beazing Pad(Non-Epoxied) <br /> The four surfaces wae: <br /> • Dry Concrete <br /> ■ Wet Conccete <br /> ■ Dry Rubber Membrane <br /> ■ Wet Rubber Membrane <br /> Detailcd information of both the seismic and friction usts is available upoa requesK. <br /> If you have any qu�:stions regard'zng this matter,pleave do not hesitate to call. <br /> Re ards, <br /> � <br /> Rendy Russ,P.E. <br /> �600 G5�1 A�EIJI,� aATON ppUG�, I,A �0820 <br /> �I,��NON� ( 225) �69-5110 �AL5IMII,� ( 225)769-288Z <br /> a �d i�z� �oN �Nac� �ll 1001 '8 '9�d <br />