В якості вхідних конструкцій найчастіше використовуються сталеві двері. Ці вироби здатні найкращим чином забезпечувати безпеку, тому у них немає конкурентів на ринку. Також двері можуть робити з дерева, але в якості квартирних такі конструкції практично не використовуються, зазвичай їх застосовують в заміських будинках, тому перше місце займають саме металеві вироби. Для вхідних дверей це оптимальний варіант, що дозволяє також забезпечити захист від холоду і зайвого шуму, завдяки гарному ізоляційному матеріалу.
З чого складається металеві двері?
Існує чимало різних конструкцій, які мають металевий каркас і можуть відрізнятися товщиною полотна, особливостями виконання, використовуваної фурнітурою і іншими нюансами, однак при цьому загальна будова біля дверей схоже:
- Найзначніша частина — це дверне полотно. Воно виготовляється з різних сплавів. Якіснішими вважаються полотна з холоднокатаної сталі, яка міцніша і стійка, ніж гарячекатана. Також краще, якщо в складі сплаву буде середня кількість вуглецю, оскільки сталь, насичена вуглецем, зазвичай не така міцна.
- Всередині полотна є спеціальний підсилює каркас — ребра жорсткості. Його не видно зовні, але він забезпечує додаткову стійкість двері. Залежно від моделі, ребер може бути різна кількість, але чим їх більше — тим краще.
- Також всередині полотна знаходиться ізоляційний шар із спеціального матеріалу, що забезпечує захист від холоду і зайвого шуму. В якості такого наповнювача можуть виступати різні матеріали, але найкраще підходить спінений поліуретан або мінеральна вата, оскільки вони володіють всіма необхідними якостями, не схильні до усадки і не вбирають вологу.
- Полотно кріпиться на дверну раму або коробку. Вона повинна бути досить міцною, щоб витримувати наявний вага. Особливо це стосується важких посилених дверей.
- Також важливо достатню увагу приділити фурнітурі, хоч вона і не видно, але відіграє важливу роль, посилюючи захисні властивості і забезпечуючи нормальне функціонування вхідних дверей.
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