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HomeMy WebLinkAboutPermit Field Test & Inspection Report 2007-2-15 i' c, It AA I afghan BSIDrJ_18t ENGINEERING February 15, 2007 C -6.~ ~'.. o --> 2f-- Mr. Tim Hovet Sycan Development Corporation 840 Beltline Road, Suite 202 Springfield, OR 97477 Ref.: Alternate Mechanical Unit Support Gateway 3346 AAI Project No, A06011 Dear Mr, Hovet: Kaz Kawamoto ofMegaPacific Company has }'~v}'osed an alternate design for the support of the rooftop mechanical units at the Gateway 3346 Retail Center. The pwposed support detail is attached. The flat C5x6,7 channel support is adequate for the design loads .dVJ..Ll the unit and roof snow provided the mechanical umts have their long sides centered between the joists, The mechanical units must be centered between the joists and the units must be spaced to provide one unloaded joist bay between them, The W' diameter bolts at each end of each channel are adequate for the wllld and seismic anchorage of the unit. As shown, the W' diameter bolts run between the top chord angles of the supporting joists, A W' x 2" x 2" plate washer should be supplied below the angle legs for bearing ofthe hex nut and washer connection. ' In order to minimize additional details, the mechanical units can be placed within 1'-0" either side of the Joist girder centerline to allow for the same flat channel detail and connection to the joists. See the attached sketch for pwpOsed mechanical unit placement. The connection of the mechanical unit to the flat channel shall be a mimmum of (4) #10 screws equally spaced along each long side, This alternate design can replace the connections detailed previously for the mechanical units in both building provided the above criteria are met. The previous design was provided to support the mechanical units based on the mechanical engineers layout. If the placement of the units can be adjusted to meet the above criteria, then the alternate design is acceptable. If there are any questions or CvlillUents, please do not hesitate to call, Sincerely, ) Steve Y ung, PE SE Project Manager 4875 SW Griffith Drive I Suite 300 I Beaverton. OR 197005 503.620.3030 I tel 503,620.55391 fax www.aaleng.com ~ ~ 123'-4' 11'-4' 18'-8' 1'-12>' ,;1'-12>' (4) ,. 6'-8' OC = 26'-8' ~ ~ -~ -~ wlw=~"=~~ Lt.L.###'"#W#'<i~'~'~ - ._;;~l;:'r i I J ! ~ ~ ........ ~4'_ ' - -------~IJ~1YP I ~~~~l I I : , V,g , ~ ~. ~ ~ =t e ~ I i I ~ rnI1IIlIII : ~ -------1 ~ I; ~ ~J~~- r ~it i ,g " r J ~ 1 0> O.5k / TVP EA. OIST Ra= 2/S! 3 r , II ! f Q : I : (0 ~ i /l . ,I A\. r-:.'-~n ~ .........;':! - ~\'"'rr'<=lmfr~,-;/ '~- l:;l :: '- -l I I {I ~ : I I . I If. ~ . ..! l__ ----f"\--.--... J ---.-, :1 I UNam ~I ! ~t' ql';,,,,n,,(, : ! I 'I 1------ ,-- --' i I i I I, .---- ---. =~i-' --- ---~.--- t--.----. --.' r~J"- .l..j;= ~ :alr""r"~ . DRIFT ZONE 1':1'-8' ~\\,,~ J.. 'J ~ jp N Q I jp N ~ in .O-,;:~ ~~ot .0-,0<;1 ~! ..-.' \II Q 1l co I ... ~;, ... .><>.....A.... >"-Yr "', wl.. I _ ~ . ;:; ~.~~ Q, ~ .":' I~:.' ...-#'.. ..1.." -.;..~..-A:t" ':-~.-.'..;_..-..!:o;.~ 'eclt,;€I'~1 I ""_ g I .""', I I J (l'?1 L"';: 1 >11"'1 " ; ;1 3NOZ 1:l1~d ~U~ I ~J9d9'C ~I Ii :----tJ11" .Q-,g . : ,. ,...<:::~, <2n"m! ~ .r'~ 6 t- . E t3 " _L \..' I\' ~~ . . t ~ 'J to I,.: ,.r , ' \:. :, }I~ L oft!~t-;; ,I '1 . ,j I I. , /. ' , :" ~ ' ..1 . r-lt:j \t~ I "'-Tt-" L ~~J I L9I/L~;:J >Ie;: L~ ::.. ."'-,e\: ",.,I.......~,'._,,~..,._.' q .~ ~.),\4fb~~~ p~ ~ P6~ ~(\ :~ ... ;- .,*," r .j.' p,1 L~ ....~dlJ.. L-'''~~~-W'!::l \f.l 1'/ ,Ui d.U~ -:is q . ILqI/L<~) >Ie;: t., \I' ~ , - '7 i.ii ~ J-"l. 11 I S.U ~~~~-, .: ~g .1--,6 I' ,t.,., iZ'1 I I ~ -~-_.~...._-:.:: ~}(t1ffl I .0',11 L. 71 IJ \l' -' I ~ -' .1 I .' l. oP ~ e \!' ~ .~,~ .'V\.~ l; .0-,.::1 ~ J~d@.,; --' ll! , -I.: 0--. ~ I i I,u, :~g If' : I=-',=, __~..........,:... I . w~ ~ ~~ j -=# -; L ~1fW). .1 l.'9'LNt;~w.g \ -: W -I ,-f; .' '-(D . ". -'":;11 I ,~ f .O"I~I -............uu UUlllllll Jsd 0"; :1 I I I I I ~ : 13 \'l> 0' Il! \II .- \'l> ,,:Jl: . \ II I .? c.JtA.ntte( (AI 1.7'5" f=l",.Wj <- ~..~ -- ~ crltb" '" Zll - ~.. oS(017ee>t Ac~-e . ~, fypt~l r,- ~ _L .. (/-B~'" ~ ., .\: \~q> ~t~ ~Z- ,..., _I \ .(L"_~ _ , , 't '<< lG i~-t: ., f II ~ ~ J"O\~h I JlL- I ~J fA'WJ 'I \J~rr n '- - t bl~\ M'5