Video: Dab tsi yog qhov siab tshaj plaws rau lub pob zeb pob zeb?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
PRE-STRESSED COMPOSITE LINTELS
Raws li cov brickwork mortar matures, daim ntaub ntau tshaj 1200mm ncua yuav tsum tau propped ntawm 1200mm centres. Bearings ntawm txhua qhov kawg yuav tsum yog yam tsawg 150 hli.
Qhov tseeb, kuv xav tau daim ntawv yas loj dab tsi?
Yog tias koj muaj qhov pom tseeb ntawm 1200mm, koj yuav xav tau ib 1500 mm lintel ntev kom haum raws li qhov xav tau 150mm ncua ntawm txhua sab ntawm qhov qhib. R15 yog qhov nrov qhob khoom; ntawm no koj tuaj yeem pom cov lus teev cov nqi nce mus txog a ntev ntawm 1800mm.
Ib sab saum toj no, koj xam lub lintel li cas? Cov lintel qhov loj yog qhov siab thiab dav, thiab yuav nyob rau hauv inches. Muab cov qhov ntev no los nrhiav thaj tsam hla ntu. Piv txwv li: Yog tias daim ntawv loj qhia tias daim iav rau ntsuas 8 los ntawm 16 ntiv tes, nws yuav muaj qhov chaw hla ntawm 128 square inches.
puas yog pob zeb lintels thauj khoom?
Lintels feem ntau yog siv rau thauj khoom - kev coj tus kheej lub hom phiaj, tab sis lawv kuj tuaj yeem ua kom zoo nkauj. Cov khoom siv ntau tshaj plaws rau cov ntaub ntawv yog ntoo, hlau thiab qhob . Hlau daim ntaub feem ntau yog ua los ntawm pre-galvanized steel uas yog txiav thiab yob-tsim los yog nias rau hauv cov duab yuav tsum tau ua.
Lub lintel hnyav hnyav npaum li cas?
Kev qhia tshwj xeeb
| Qhov tob: | 65.0 |
|---|---|
| Ntau yam: | Prestressed Textured |
| Nyhav: | 25,7kg ib |
| Ntev: | 1800.0 hli |
| Dav: | 100.0 hli |
Pom zoo:
Yuav ua li cas yog qhov tsawg kawg nkaus pob zeb npog nyob rau hauv mm ntawm ib tug cam khwb cia nyob rau hauv qhov chaw pob zeb tso tawm tsam thiab mus tas li raug rau lub ntiaj teb?
Table-1: Yam Tsawg Npog Thickness rau Cast-in-Place Qhob Hom kev tsim ua vaj tse hla, hli Qhob nrum tiv thaiv thiab txuas mus tas li nrog hauv av 75 Pob zeb sib chwv nrog av lossis dej No. 19 txog No. 57 tuav 50 No. 16 bar thiab me dua 40
Lub npe dab tsi tau muab rau Wall Street kev sib tsoo ntawm 29th Lub Kaum Hli 1929 tseem hu ua kev lag luam poob ntawm xyoo 1929 uas ua rau muaj Kev Nyuaj Siab Loj nyob rau xyoo 1930 Kev Nyuaj Siab Loj yog lub ntiaj teb loj heev
Kev Nyuaj Siab Loj tau pib hauv Tebchaws Meskas tom qab muaj kev poob loj hauv cov nqi khoom lag luam uas pib thaum lub Cuaj Hlis 4, 1929, thiab tau dhau los ua xov xwm thoob ntiaj teb nrog kev lag luam lag luam poob ntawm Lub Kaum Hli 29, 1929, (lub npe hu ua Dub Tuesday). Nyob nruab nrab ntawm 1929 thiab 1932, thoob ntiaj teb cov khoom lag luam thoob ntiaj teb (GDP) poob los ntawm kwv yees li 15%
Lub hauv paus ntsiab lus ntawm kev siv siab tshaj plaws thiab zoo tshaj plaws yog dab tsi?
Ib qho cuab yeej yuav tsum raug ntsuas raws li nws qhov siab tshaj plaws thiab siv tau zoo tshaj plaws. Lub ntsiab lus ntawm kev siv siab tshaj plaws thiab zoo tshaj plaws yog raws li hauv qab no: Tsim nyog, tsim nyog thiab raug cai siv cov av tsis muaj lossis kev txhim kho vaj tse, uas yog lub cev ua tau, kev txhawb nqa tsim nyog, muaj peev xwm ua tau nyiaj txiag, thiab qhov ntawd ua rau muaj txiaj ntsig siab tshaj plaws
Yuav ua li cas koj txiav txim siab qhov siab tshaj plaws thiab zoo tshaj plaws ntawm kev siv cov cuab yeej?
Cov cuab yeej yuav tsum raug ntsuas raws li nws qhov siab tshaj plaws thiab siv tau zoo tshaj plaws. Lub ntsiab lus ntawm kev siv siab tshaj plaws thiab zoo tshaj plaws yog raws li hauv qab no: Qhov tsim nyog, tsim nyog thiab raug cai siv cov av tsis muaj lossis kev txhim kho vaj tse, uas yog lub cev ua tau, kev txhawb nqa tsim nyog, nyiaj txiag ua tau, thiab qhov ntawd ua rau muaj txiaj ntsig siab tshaj plaws
Dab tsi yog qhov sib xyaw zoo tshaj plaws rau cov pob zeb pob zeb?
Kev sib xyaw ua ke ntawm 1 feem ntawm cov cement: 2 qhov chaw xuab zeb: 4 qhov sib xyaw ua ke (los ntawm ntim) yuav tsum tau siv rau kev taw qhia. Cov pob zeb yuav tsum tau muab tso rau hauv ib nrab ib teev ntawm kev sib tov.Brickwork - Muab koj cov pob zeb tso rau hauv koj lub trench