Tham khảo tài liệu 'mechanical estimating manual episode 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | This page intentionally left blank Chapfan-10 Galvanized Duckwork This section of the manual covers pricing of low medium and high pressure rectangular galvanizedductwork as used in HVAC system in coudmercial ing itasrK al oad indudrml buildmgs r 1. Low pressure galvanized ductwork comprises the bulk T HVAC duatwaeg ussd m Hmddmgs. -t s used for sestem prrsaucoo between g-2 d sd and air vutodties betwesn 0-pa00 FPM. Gnaurally connection. ars wi h cleats a lid -he seams are cnnptoek or pUisauiga peinforcing in reis t re icrdnn i rei forced cleute rrc ntniducd nngk-a. 2. Medium pressure galvanized duetwork is used for pressures bom 2-6 . end velashius foam 200u to 4000 .he . 2hnge. High n recss re .atornizhal ductwark Gd usndm systems wharetine .Pic even 6 and rho gbtoc. ties are a vet ass0 oea-. Beth medium and high pressure ductwork must be sealed to msietpm pussrninns wtihm 1 tw c 2 G derigia CFM. Bite are sonnfrunterl witii phtsltmngh reams ang the conngctiuns are w tii cteatewfo cGyeu ccn seatoross gon-ket comgnnionanpioo. foinfoaerngte whh ongtes si-o-c backup rso the sunneclion cncVor i. preocribcd mter-vals ASHRAE SMACNA Standards All ductwork weights labor productivity rates and constiuction .a lacsod art OMACNA and A RAE criteria and ondrefraditione. gasp. ecampte low erearsne e r i i 0-12 wfoe bn u O 13 -b0 ep gaugs OT -n4 bngaeoi . 5 5 -8h 2ognuhe c di Vhr 1 wide nu dauge. Methods of Estimating Ttes chaptet covers estimating rectangular galvanized for HVAC ooc-cmr bo ter lay tha pern and uy -he pound Ts estimate gea hnear fosC a pee pouna Ouhrne can bi o i vehte mto hnoac feu- nates. Ahtebor productivity cater and - gntes are based on spandard contti m 0 towec floatr ten fool. dudra-ns. new conaaounrrgunnd uveraonspgsecopu titoo e ESTIMATING GALVANIZED s LCTWOLK Bd THA PIECE Benefits 1. Tile mrjor benefit of estimating galvanized ductwork by thh pisce N c ceme abOT acncraoy. Yothsn tile actun lnear flme .
