Yuav ua li cas txiav txim cov kev luj ntawm cov ntoo?

Kev luj ntawm ntoo tsis ruaj tsis khov. Qhov no tus nqi nyob ntawm cov av noo yug. densities yuav txawv lug txawm rau cov tib hom ntoo. Vim hais tias tso zis rau hauv lub rooj tsuas aggregated cov ntaub ntawv. Nyob rau hauv kev xyaum, cov kev ntsuas ntawm ntoo ceev Salaries txawv los ntawm cov neeg nyob rau hauv cov ntaub ntawv cov lus qhov tseem ceeb thiab xws li editing yog tsis suav tias yog ib tug txhaum.

Rooj ntoo ceev

Tseem Ceeb! Lub rooj muaj ntaub ntawv raws li ntoo av noo ntsuas 12%. Piv txwv li, lub kev faib ua feem ntawm cov ntoo thuv ntoo 520 kg / m ^3.

Txij thaum ntawd los daim duab nyob

Cov kev ceev ntawm cov ntoo yog txiav txim yug. Raws li, qhov xam nruab nrab tus nqi ntawm cov kev luj ntawm cov pa ntoo uas yog tau vim lub ntau yam tswv yim kev tshawb fawb. Thaum lub sij hawm ib tug series ntawm thwmsim nrog ib tug tsiaj muaj peev xwm yuav tau differing kev kawm ceev qauv. Nyob rau hauv qhov tseeb, nyob rau hauv ib lub rooj saum toj no, sau cov ntaub ntawv rau cov kev ceev ntawm tsob ntoo hom sau los ntawm ntau qhov chaw, qhia tias lub variability ntawm meej thiab txheeb ze ua tau zoo ntawm cov kev luj ntawm cov ntoo.

Cov pawg lwm ceev ntoo

Nws yog feem ntau laij tus luj ntawm ntoo ntawm ntau hom nrog ib tug dej cov ntsiab lus saum toj no 12%. Nws yog ib tug normative kev ntsuas, raws li uas tus cav ntoo yog muab faib ua peb ceev Group:

1. Tsis tshua muaj ceev (mus txog 545 kg / m ^3). Pawg no muaj xws li: spruce, ntoo thuv, fir, cedar, Juniper, poplar, linden, willow, Aspen, Alder (dawb thiab dub), qab zib chestnut, Walnut (dawb, grey, Manchu), Amur cork.
2. Sredneplotnye (555-745 kg / m ³⁾ pob zeb yog: larch, yew, birch (drooping, ntxuav, dub, daj), beech (Eastern, European), elm, pear, ntoo qhib, Maple, hazel, Walnut, Sycamore, roob tshauv, persimmon, Kua, tshauv (dog dig, Manchu).
3. High ceev (saum toj no 755 kg / m ^3), cov uas yog: acacia, birch hlau, hornbeam, ntoo qhib, chestnut, hlau ntoo, boxwood, pistachio, ostrya.

Tus naj npawb qhia hauv qab no yog ib daim duab cov ntoo pob zeb hardness. Qhov tseem ceeb xa nyob rau hauv lub coefficients.

Raws li cov kev ceev ntawm pob zeb yog kev cob cog rua nrog lub flammability ntoo

Lub calorific nqi ntawm ntoo (cua sov hwj chim tus nqi) yog txiav txim los ntawm tus thawj index - kev nqus ntoo. Qhov no yog vim muaj ib tug ncaj qha kev sib raug zoo: ntau dua cov kev ceev ntawm lub pob zeb qauv, lub siab dua qhov feem pua ntawm cov muaj combustible teeb meem thiab zoo dua roj hlawv.

Ib tug ceev nquag siv nyob rau hauv kev tsim kho, xaiv cov khoom rau kev tsim kho ntawm lub tsev, ru tsev truss system, vim rooj tog, kev yuav khoom roj rau qhov.

Koj tsis muaj ntoo ua khoom tsis yooj yim sua. Tsis tau ntoo, tib neeg yuav tsis muaj tag nrho. Vim hais tias cov kev tshawb fawb ua nrog ntoo, yog ntawm kuj zoo kawg tseem ceeb, vim hais tias ua tsaug rau lub engineers tswj kom tsim ib tug ruaj tsev, ua muaj zog thiab txhim khu kev qha cov rooj tog, yuav high-zoo raw khoom rau cua sov qhauj.