Cov txheej txheem:
Video: Vim li cas cov joists raug tsim los ntawm kev muaj koob meej?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Nws yog tau txais koob meej vim nws ncaj, muaj zog thiab siv yooj yim dua li ntoo sawn ncaj qha los ntawm cov ntoo. Engineered lumber yog tsim los ntawm cov ntoo chips thiab cov hlua ntawm cov ntoo uas txuas rau hauv pem teb joists , beams, studs, trusses thiab lwm yam.
Kuj paub yog, puas yog engineered pem teb joists zoo dua?
Ntxiv rau qhov nominal 10 thiab 12 nti qhov tob, engineered Kuv- joists yog ua nyob rau hauv qhov tob tshaj ntawm cov tsoos framing lumber. Qhov zoo dua ntawm ntoo yog qhov tob dua I- joist tus tswv cuab tsuas yog incrementally ntau kim tshaj tus tswv ntiav ntiav vim nws yog ua kom tob los ntawm kev ntxiv ntau web khoom.
Tsis tas li ntawd, nyob deb npaum li cas tuaj yeem tsim kho hauv pem teb joists span? Qhov no yog qhov feem ntau raws li qhov raug ncua yog 15ft. Qhov hnyav tshaj plaws joist , nrog rau cov xwm txheej saum toj no, yuav span qhov siab tshaj plaws ntawm 23 feet, 8 nti.
Ib yam li ntawd, nws tau nug, puas yog TJI joists zoo?
Qhov seem stability ntawm TJI joists pab lawv tiv thaiv warping, twisting thiab shrinking uas tuaj yeem ua rau cov plag tsev squeaky. TJI joists yog lub teeb yuag thiab tuaj nyob rau hauv ntev ntev, uas ua rau lawv sai thiab yooj yim rau nruab dua li ib txwm framing, thiab txuag koj ob lub sij hawm thiab nyiaj txiag.
Dab tsi yog qhov zoo tshaj plaws ntoo rau pem teb joists?
Lub zog ntawm cov hom ntoo uas siv rau framing muaj xws li:
- High Bending Strength: Southern yellow Pine thiab Douglas fir.
- Medium Bending Strength: Hemlock, spruce, thiab redwood.
- Tsawg Bending Strength: Western liab cedar, Eastern ntoo thuv dawb, thiab ponderosa ntoo thuv.
Pom zoo:
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