JPH0215921Y2 - - Google Patents

Info

Publication number

JPH0215921Y2

JPH0215921Y2 JP1983053113U JP5311383U JPH0215921Y2 JP H0215921 Y2 JPH0215921 Y2 JP H0215921Y2 JP 1983053113 U JP1983053113 U JP 1983053113U JP 5311383 U JP5311383 U JP 5311383U JP H0215921 Y2 JPH0215921 Y2 JP H0215921Y2

Authority

JP

Japan

Prior art keywords

vault

tightening

insertion hole

tension plate

hole

Prior art date

1983-04-08

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Expired

Links

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• 238000003780 insertion Methods 0.000 claims description 16
• 230000037431 insertion Effects 0.000 claims description 16
• 230000003014 reinforcing effect Effects 0.000 claims description 12
• 230000002265 prevention Effects 0.000 claims description 7
• 229910052751 metal Inorganic materials 0.000 claims description 2
• 239000002184 metal Substances 0.000 claims description 2
• 230000002401 inhibitory effect Effects 0.000 description 7
• 238000003466 welding Methods 0.000 description 3
• XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
• 238000010276 construction Methods 0.000 description 2
• 229910000838 Al alloy Inorganic materials 0.000 description 1
• 238000005452 bending Methods 0.000 description 1
• 238000005266 casting Methods 0.000 description 1
• 238000005520 cutting process Methods 0.000 description 1
• 230000002542 deteriorative effect Effects 0.000 description 1
• 230000000694 effects Effects 0.000 description 1
• 229910052742 iron Inorganic materials 0.000 description 1
• 239000000463 material Substances 0.000 description 1
• 238000005728 strengthening Methods 0.000 description 1
• 239000002023 wood Substances 0.000 description 1