FR1346733A - Hollow bar or joist usable in particular as a retaining arch cross member for mine galleries - Google Patents

Hollow bar or joist usable in particular as a retaining arch cross member for mine galleries

Info

Publication number
FR1346733A
FR1346733A FR923974A FR923974A FR1346733A FR 1346733 A FR1346733 A FR 1346733A FR 923974 A FR923974 A FR 923974A FR 923974 A FR923974 A FR 923974A FR 1346733 A FR1346733 A FR 1346733A
Authority
FR
France
Prior art keywords
joist
usable
cross member
hollow bar
retaining arch
Prior art date
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
Application number
FR923974A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STEEL RING AND ENGINEERING COM
Original Assignee
STEEL RING AND ENGINEERING COM
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by STEEL RING AND ENGINEERING COM filed Critical STEEL RING AND ENGINEERING COM
Priority to FR923974A priority Critical patent/FR1346733A/en
Application granted granted Critical
Publication of FR1346733A publication Critical patent/FR1346733A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/01—Caps for supporting mine roofs characterised by the shape of the cap, e.g. of specified cross-section

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR923974A 1963-02-07 1963-02-07 Hollow bar or joist usable in particular as a retaining arch cross member for mine galleries Expired FR1346733A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR923974A FR1346733A (en) 1963-02-07 1963-02-07 Hollow bar or joist usable in particular as a retaining arch cross member for mine galleries

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR923974A FR1346733A (en) 1963-02-07 1963-02-07 Hollow bar or joist usable in particular as a retaining arch cross member for mine galleries

Publications (1)

Publication Number Publication Date
FR1346733A true FR1346733A (en) 1963-12-20

Family

ID=8796477

Family Applications (1)

Application Number Title Priority Date Filing Date
FR923974A Expired FR1346733A (en) 1963-02-07 1963-02-07 Hollow bar or joist usable in particular as a retaining arch cross member for mine galleries

Country Status (1)

Country Link
FR (1) FR1346733A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686810A (en) * 1970-11-05 1972-08-29 Charles R Allen Snap on drywall fastening system
US3705471A (en) * 1971-01-14 1972-12-12 Charles R Allen Snap on drywall fastening system ii
CN108412121A (en) * 2018-04-26 2018-08-17 王晓军 A kind of the crossbeam module and assembled cage construction building of assembled architecture

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686810A (en) * 1970-11-05 1972-08-29 Charles R Allen Snap on drywall fastening system
US3705471A (en) * 1971-01-14 1972-12-12 Charles R Allen Snap on drywall fastening system ii
CN108412121A (en) * 2018-04-26 2018-08-17 王晓军 A kind of the crossbeam module and assembled cage construction building of assembled architecture

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