Timber is the most ancient structur

Timber is the most ancient structural material. In comparison with steel timber is lighter, cheaper, easier to work and its mechanical properties are good. On the other hand, timber has certain disadvantages. First, it burns and is therefore unsuitable for fireproof buildings. Second, it decays.At present an enormous amount of timber is employed for a vast number of purposes. In building timber is used too.Timber is a name applied to the cut material derived from trees. Timber used for building purposes is divided into two groups: softwoods and hardwoods. Hardwoods are chiefly used for decorative purposes, as for paneling, veneering in furniture, and some of them are selected for structural use because of their high strength and durability. In modern construction timber is often used for window and door frames, flooring, fences and gates, wallplates, for temporary buildings and unpainted internal woodwork.Timber cannot be used for either carpenters’ or joiners’ work immediately it has been felled because of the large amount of sap which it contains. Most of this moisture must be removed, otherwise the timber will shrink excessively, causing defects in the work and a tendency to decay. Elimination of moisture increases the strength, durability and resilience of timber.

Результаты (узбекский) 1:

Yog'och eng qadimiy tarkibiy material hisoblanadi. Temir yog'och bilan taqqoslash ish osonroq, arzon, engil va uning mexanik xususiyatlari, yaxshi bor. Boshqa tomondan, yog'och ayrim kamchiliklari bor. Birinchidan, u yondiradi va olovbardosh binolar shuning uchun yaroqsiz hisoblanadi. Ikkinchidan, u parchalanadi.
Hozirgi kunda yog'och juda katta miqdorda maqsadlarda keng qator uchun ishlatiladi. Yog'och qurish ham ishlatiladi.
Yog'och daraxtlar olingan kesilgan materiallar qo'llaniladigan bir ismi. yumshoq va qattiq daraxtini: qurilish maqsadlari uchun ishlatiladigan yog'och ikki guruhga bo'linadi. Qattiq daraxtlari ayniqsa mebel yilda veneering, lambri kelsak, yillik maqsadlar uchun ishlatiladi, va ularning ba'zilari, chunki ularning yuqori kuch va chidamlilik tarkibiy foydalanish uchun tanlangan. zamonaviy qurilish yog'och ko'pincha vaqtinchalik bino va buyog'i ichki yog'och uchun oyna va eshik romlar, taxta, devor va darvozalar, wallplates uchun ishlatiladi.
Yog'och, darhol uni, chunki u o'z ichiga dastani katta miqdorda kesilgan qilindi yo duradgorlarni "yoki huquqqa" ish uchun foydalanish mumkin emas. Bu namlik Eng aks holda yog'och ish va hidlanib moyil kamchiliklarini sabab, haddan tashqari pasayishi, ko'tarilishi kerak. namlikning bartaraf kuch, chidamlilik va yog'och barqarorligini oshiradi.