JPH049802Y2 - - Google Patents

Info

Publication number

JPH049802Y2

JPH049802Y2 JP3271285U JP3271285U JPH049802Y2 JP H049802 Y2 JPH049802 Y2 JP H049802Y2 JP 3271285 U JP3271285 U JP 3271285U JP 3271285 U JP3271285 U JP 3271285U JP H049802 Y2 JPH049802 Y2 JP H049802Y2

Authority

JP

Japan

Prior art keywords

roof

hole

connecting piece

column

strength member

Prior art date

1985-03-07

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

• Espacenet
• Global Dossier
• Discuss

• XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
• 229910052742 iron Inorganic materials 0.000 claims description 4
• 239000000463 material Substances 0.000 description 6
• 229910000831 Steel Inorganic materials 0.000 description 3
• 238000006073 displacement reaction Methods 0.000 description 3
• 230000002265 prevention Effects 0.000 description 3
• 239000010959 steel Substances 0.000 description 3
• 239000012779 reinforcing material Substances 0.000 description 2
• XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
• 229910052782 aluminium Inorganic materials 0.000 description 1
• 239000003638 chemical reducing agent Substances 0.000 description 1
• 238000004891 communication Methods 0.000 description 1
• 230000000694 effects Effects 0.000 description 1
• 238000005516 engineering process Methods 0.000 description 1
• 238000000034 method Methods 0.000 description 1
• 125000006850 spacer group Chemical group 0.000 description 1
• 238000003466 welding Methods 0.000 description 1