대청마루

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작성자배트걸 조회 10회 작성일 2021-04-15 06:58:25 댓글 0

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[핫클립] 에어컨을 능가하는 조상님들의 과학! 한여름에도 한옥이 시원한 이유 / YTN 사이언스

한옥은 한여름에 에어컨 없이도 시원함을 유지하죠!
대청마루에서는 뜨거운 햇볕이 내리쬐거나 바람 한 점 없는 날에도
그 어떤 가옥의 형태보다도 선선하고 쾌적함을 느낄 수 있는데요.
여기서 우리는 한옥의 숨겨진 과학과 우수성을 엿볼 수 있습니다!
한여름 시원한 바람이 불게 되는 원리와 그 속에 숨겨진 과학을 알아봅시다~
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과학 좋아하는 사람 여기여기 붙어라~!
YTN사이언스의 다양한 채널을 만나보세용! :)

홈페이지 ▶ http://science.ytn.co.kr/
페이스북 ▶ https://www.facebook.com/ytnscience
인스타그램 ▶ https://www.instagram.com/ytn_science
트위터 ▶ https://twitter.com/YTN_science?lang=ko
네이버포스트 ▶ https://m.post.naver.com/sciencepost

171006 대청마루 예고 ㅣ KBS방송

추석특집 - 대청마루
2017년 10월 6일(금) 21:20 KBS 1TV.

Traditional Korean floor 대청마루 ( daecheongmaru) PART II a wooden floor without nails, screws or glue

In this video we finish our traditional wooden floor without nails by adding the floorboards themselves to the joists we prepared in the last video.

This floor is our own version of a korean 우물마루 (umulmaru) technique. Our technique differs from classical korean in the use of japanese joinery and a sliding dovetail to hold the boards.

There are many ways one could accomplish this style of flooring, we chose a method we found to be the best for us, to carve a simple dovetail rebate into each joist then carefully match the ends of the floorboards to this angle. The dovetail prevents any cupping or movement of the boards but allows expansion and contraction and any size board to be used. Other methods used in Korean floors are a simple tongue at the end of each board and a groove carved into the joists to receive it.

To get the boards into the groove, a larger slot is cut out on one end of each joist, letting the boards drop down and slide forward. As the final "capping board" is not restrained by the dovetail rebate as all other boards are, its important that it is a very tightly fit quarter sawn board, as a quarter sawn board should remain the most stable and resist the temptation to cup over time.

A few important points on this floor to remember;

1. all boards are placed bark side up (outside of tree facing up) as is the custom in many asian traditions

2. Either green boards or air dried are best, not kiln dried, as a kiln dried boards may swell exponentially in subsequent humid summers and could actually rupture the buildings frame. If kiln dried wood is used it would be wise to plan for and accomodate any excessive expansion with extra covered space on one end of the rows, or the most simple solution, to utilize "galloping joists" which sit atop the carrying beams instead of flush with them.
Our floor is semi dry, boards being milled and air drying 6 months. As they continue to dry they can be tightened up.

3. Capping boards should be either single large quarter sawn boards, or made up of several slimmer quarter sawn peices joined together.

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My Website: https://mrchickadee.com/

My Instagram: https://www.instagram.com/mr_chickadee1/

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