Title:
CRACK PREVENTION SLIT FOR CONCRETE BOARD AND ITS FORMATION METHOD
Document Type and Number:
Japanese Patent JP3952879
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent the occurrence of a crack caused by drying and shrinkage of concrete and penetration of rainwater into the crack in a concrete board exposed to rainwater such as a balcony and an external corridor.
SOLUTION: Molded plates 3 having thickness exceeding a fixed value in the direction of length of the concrete board 2 and elasticity for following shrinkage of concrete when it is hardened and/or after it is hardened and relative deformation of the concrete boards 2a, 2a are arranged on the whole cross section of the concrete board 2 at an interval in the direction of length of the concrete board 2 to be constructed at site.
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Inventors:
Sakuraoka Yuji
Shunji Tsurumaki
Tomoaki Inoue
Shunji Tsurumaki
Tomoaki Inoue
Application Number:
JP2002187531A
Publication Date:
August 01, 2007
Filing Date:
June 27, 2002
Export Citation:
Assignee:
Kashima Construction Co., Ltd.
International Classes:
E04B1/62; E04B1/682; E04B1/684; E04B5/00; (IPC1-7): E04B1/62; E04B1/682
Domestic Patent References:
| JP60094503U | ||||
| JP1046641B2 | ||||
| JP57184145A | ||||
| JP2515698Y2 | ||||
| JP2005511U | ||||
| JP4166532A | ||||
| JP58164849A | ||||
| JP6036095Y2 | ||||
| JP4008161Y2 | ||||
| JP4011855U | ||||
| JP4011857U | ||||
| JP7062754A | ||||
| JP2001140363A |
Attorney, Agent or Firm:
Satoshi Kumon
Kumon enjoyment
Kumon enjoyment
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