He aha whakatau te taimaha o te rakau motuhake?

Ko iu taimaha o te rakau Motuhake. tei ana tēnei uara i runga i te momo haumākū. Ka taea e densities rerekē whānui noa mo te momo ano o te rakau. No te mea putanga i roto i te papa hiatonga raraunga anake. I roto i te mahi, i te mehua o tauwaenga kiato rakau rerekē i te hunga i homai i roto i ngā uara tepu te tuhinga, me te kore e taua whakatika whakaaro he te hape.

te rakau Ripanga kiato

Nui! Ko te tepu Kei raraunga e hāngai ana te rakau tohu haumākū 12%. Hei tauira, te rahi o te rakau paina 520 kg / m ^3.

Mai tei taua ahua

Ko te kiato o te rakau, ko te momo fakapapau'i. Nä, ko te uara toharite tātai o te taimaha o te rakau tikanga e e whiwhi motuhake e tika ana ki te rangahau mahi maha. I roto i te raupapa o ngā ki momo kotahi e taea te whiwhi rere hanganga mahi kiato. I roto i te meka, i roto i te tepu i runga, kohia raraunga i runga i te kiato o ngā momo rākau kohia i ngā puna, tohu e te rerekētanga o te mahi tino, me te whanaunga o te taimaha o te rakau motuhake.

Rōpū rakau kiato

Kei te te tikanga whakatatau te reira i te taimaha o te rakau o momo rerekē ki te ihirangi makuku i runga 12%. Ko te mehua normative, rite ki nei te wehea te rakau ki toru Rōpū kiato:

1. kiato iti (ki runga, ki te 545 kg / m ^3). Tenei kāwai ngā: te puruhi, te rimu, kauri, hita, kauri, he papara, Linden, whiro, ngaueue, alder (ma, me te pango), pereni reka, wōnati (ma, hina, Menisuú), Amur puru.
2. Sredneplotnye (555-745 kg / m ³⁾ toka he: larch, Yew, birch (povisloj, fluffy, pango, kōwhai), tawai (oriental, Pākehā), erema, pea, oki, pereni, he aramona, wōnati, hokamora, pungarehu maunga, persimmon, aporo, pungarehu (mau, Menisuú).
3. kiato High (runga ake 755 kg / m ^3), i roto i nei ko: hitimi, birch rino, hornbeam, oki, pereni, rakau rino, taumanu, pam, ostrya.

Ko te ahua e whakaaturia i raro nei ko te toka pakeke te rakau hoahoa. Uara tuku i roto i nga tau whakarea.

Ka rite ki hono te kiato o toka e ki te flammability o te rakau

whakaritea te uara calorific o te rakau (uara mana whakawera) te i te taupū tuatahi - te rakau mahara motuhake. Ko tenei e tika ana ki te whanaungatanga hāngai: te teitei te kiato o te hanganga kamaka, i te teitei te ōrau o te mea combustible roto me te wera pai wahie.

He kiato mātātoa whakamahia i roto i te hanga, te kōwhiri i te rauemi mo te hanganga o nga whare, pūnaha wharikitia tuanui, hoahoa taonga, hoko wahie mo te hanga.

Meatia kahore hua rakau tukatuka taea. Whakarerea te rakau, e kore e taea e te tangata te tīariari tino. No te mea rangahau whakahaere ki te rakau, he o faufaa nui, no te mea te whakawhetai ki te Engineers whakahaere ki te hoahoa i te mau utuafare roa, te whakaputa taonga kaha, me te pono, hoko-te kounga tiketike rauemi raw mō hinonga whakawera.