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Specifications RECEIVED DEL 2 " 2O21 ?02o L 6/ gcve. C11 Y TIGARD BUILDING DIVISION MicKeniJe Eni&nieeriini LLC; ES&A Sign and Awning 89975 Prairie Rd. Eugene, Oregon 97402 Calculations for Driveway Sign Tigard, OR December 17th, 2021 PROFESS .5 /..GIN\ �O vFpT• 12 2�� �� EXPIRES:12/31/2021 Todd Costley P.E. ES&A- Eugene, Oregon McKenzie Engineering, LLC Todd Costley P.E. Driveway Sign Job#1033 Tigard, Or. 12/17/2021 ES&A- Driveway Sign - Tigard, OR Wall Sign Design: McKenzie Engineering, LLC(McKenzie)has been tasked to provide structural engineering services for the connection of an aluminum framed wall sign in Tigard,Oregon.The State of Oregon has adopted the 2019 Oregon Structural Specialty Code(2019 OSSC).The 2019 OSSC references the 2015 Aluminum Design Manual for aluminum design and ASCE 7-16 for design loading. Design Summary: The sign has been designed by ES&A Sign and Awning Company.The main support elements of the sign support framing has been designed by Mackenzie out of Portland using steel members(Mackenzie Project Number 2190290.14 dated 12-3-21).The engineering design forces by Mackenzie will be used below to calculate the adequacy of the sign connection to the newly designed davit arms.Anchorage of the sign to the davit arms will be machine screws,with machined bolts attaching the main sign to the anchored backer. x74- {{ F 1 r ALUMINUM BACKGROUNO ter S7 7ltp 1 y --- - 2'X4'ALUMINUM C CHANNEL FABRICATED RACEWAY 1 ` 1 11211 1 2"ALUMINUM SO TUBE lw Ifi sr 2'X4'ALUMINUM C CHANNEL FABRICATED RACEWAY Sign Image per ES&A Determine Loading: Loading shown here will be used to calculate the connection of the sign to the 3rd party designed (Mackenzie-Portland) DavitArms.The Mackenzie calculations clearly show the worst case loading on a given arm,this loading will be used to calculate the connection forces which need to be resisted. Vmax,arm :— 3701bf Maximum vertical shear per arm based on weight of sign and tributary area calculated by others. Tmax.arm 8401bf Maximum wind load tension on a given arm based on tributary area calculated by others. C:\Jobs\1025-1050\1033_ES&A_Driveway Finance Tigard\2 Calcs\Driveway Sign Calcs.xmct 1/2 ES&A- Eugene, Oregon McKenzie Engineering' LLC Todd Costley P.E. Driveway Sign Job#1033 Tigard, Or. 12/17/2021 Determine required connections: 1/4" SELF•TAPPING SCREWS 16'OC WHERE RACEWAY CONTACTS DAVIT ARM ES&A Sign and awning have proposed using (3) 1/4"self tapping machined screws to connect the sign to the davit arms. Determine if this is an adequate connection. DavitArms are 6x6x1/4"per original davit arm engineering. Nscrews 3 Tmax.arm Tscrew = 280Ibf Nscrews Vmax.arm Vscrew = 123.333Ibf Nscrews Performance Data Fastener Steel Gauge Fastener Steel Gauge(lapped) Dia. Pl. 26 24 22 20 18 16 14 12 3/16 Dia. Pt. 26 24 ® 20 18 16 KU® 12 2 156 243 283 375 605 848 1181 1856 3520 12 365 600 623 898 1370 Eno 2202 3 142 211 289 341 551 757 1063 1631 2998 ��SS 769 1358 1620 1970 1986 1?4 3 141 231 293 346 613 880 1145 1858£4550 114 © ■00 930 Egi 2100 2650 Data From Tek Self Tapping Screws:all self tapping screws will have similar capacities. Even at the lightest gauge available,the self tapping screws proposed (1/4"diameter),would be adequate.Since the connection is into a 1/4"wall tube, it is clear that the connections are"OK'. Other sign to sign connection show a bolted connection with machine bolts.The bolts are in more quantity,and larger than the self tapping screws and are therefore"OK"by inspection. C:\Jobs\1025-1050\1033_ES&A_Driveway Finance Tigard\2 Calcs\Driveway Sign Calcs.xmct 2/2