Puas yog nws zoo rau ntsia hlau rau hauv pem teb?
Puas yog nws zoo rau ntsia hlau rau hauv pem teb?

Video: Puas yog nws zoo rau ntsia hlau rau hauv pem teb?

Video: Puas yog nws zoo rau ntsia hlau rau hauv pem teb?
Video: Ua Tsis Tau Tus Neeg Koj Nyiam - 2 SIAB(Karaoke/Instrumental) 2024, Kaum ib hlis
Anonim

Cov qhov tsis tuaj yeem loj dua li ib feem peb qhov tob ntawm cov ntoo, yog li qhov loj tshaj qhov loj rau 2 × 12 joist (qhov loj me 1-1/2 x 11-1/4 in.) yog 3-3/4 nyob rau hauv. Koj tuaj yeem laum qhov nyob txhua qhov chaw raws qhov ntev ntawm cov joist (thawj daim duab). Yog koj tau tsim I-joists, koj tuaj yeem xyaum qhov mus txog 1-1/2 nyob rau hauv.

Yog li ntawd, dab tsi yog siv screws rau pem teb joists?

Hlau Ntsia hlau Cov hlau zoo ntsia hlau qhov ntau thiab tsawg rau kev ruaj ntseg 3/4-nti plywood rau lub pem teb joists yog #8, #10 thiab #12 ntsia hlau . Tus lej hais txog qhov tuab ntawm lub ntsia hlau . Txhua qhov muaj nyob rau hauv qhov ntev ntawm 1 1/4 txog 3 ntiv tes. Feem ntau, 3-nti ntau yam yog siv kom ruaj ntseg plywood subfloors.

Tsis tas li ntawd, koj hnyav npaum li cas koj tuaj yeem dai los ntawm cov khoom siv hauv pem teb? Yog koj spread ua hnyav thoob 3 joists , uas tso tsuas yog 100 lbs ib ntoo (ua tau zoo heev). Yog koj txhawj xeeb txog tej yam muaj peev xwm sagging, koj ua tau nthuav tawm ntxiv hnyav hla 2 bolts per ntoo , uas tsuas yog 50 lbs ib lub bolt (zoo heev).

Ua raws li qhov no hauv kev txiav txim siab, kuv tuaj yeem xyaum qhov twg hauv qhov joists?

thaj tsam nruab nrab ntawm 2 × 10 ntoo qhov twg qhov tuaj yeem mus. Txawm hais tias notches tsis pub nyob rau hauv nruab nrab peb ntawm ib joist cov ntev, koj ua tau laum qhov nyob qhov twg raws qhov ntev ntawm hauv pem teb ntoo ib 5 1-4. cheeb tsam muab tsis muaj lwm yam qhov hauv ntoo los yog thais raws nws sab saum toj lossis hauv qab.

Koj puas tuaj yeem laum lub qhov los ntawm kev txhawb nqa beam?

Shear yog qhov loj tshaj nyob ze txhawb nqa ntawm nqaj (cov ntsiab lus bearing). Khoov yog qhov loj tshaj plaws nyob rau hauv nruab nrab ntawm ib qho kev ncua. Muaj ib txoj kab kev xav dhau kab rov tav nruab nrab ntawm a nqaj , paub li 'neutral axis'. Qhov tau raug laum dhau lub nruab nrab axis tsis poob ntawm 'bending' lub zog.

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