GB718134A - Improvements relating to girders, particularly for use in mine-roof supports - Google Patents

Improvements relating to girders, particularly for use in mine-roof supports

Info

Publication number
GB718134A
GB718134A GB5646/52A GB564652A GB718134A GB 718134 A GB718134 A GB 718134A GB 5646/52 A GB5646/52 A GB 5646/52A GB 564652 A GB564652 A GB 564652A GB 718134 A GB718134 A GB 718134A
Authority
GB
United Kingdom
Prior art keywords
girders
girder
roof supports
mine
improvements relating
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
GB5646/52A
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.)
Directie van de Staatsmijnen in Limburg
Original Assignee
Directie van de Staatsmijnen in Limburg
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 Directie van de Staatsmijnen in Limburg filed Critical Directie van de Staatsmijnen in Limburg
Publication of GB718134A publication Critical patent/GB718134A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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)
  • Bridges Or Land Bridges (AREA)

Abstract

718,134. Mine roof supports. DIRECTIE VAN DE STAATSMIJNEN IN LIMBURG. March 4, 1952 [March 8, 1951], No. 5646/52. Addition to 711,648. Class 20 (2) A box-section mine roof girder comprises upper and lower flanges 1, 2, Figs. 2, 3 welded to vertical webs 3, 4 which increase in height towards the place at which the girder is adapted to be supported by a pit prop 5. At this place the upper flange 1 is widened to form an upper supporting surface 6 as described in the parent Specification, and is supported by lateral webs 7, 8. At its ends the girder is provided with a hole 9 and pin 10 for connecting successive girders to each other.
GB5646/52A 1951-03-08 1952-03-04 Improvements relating to girders, particularly for use in mine-roof supports Expired GB718134A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL718134X 1951-03-08

Publications (1)

Publication Number Publication Date
GB718134A true GB718134A (en) 1954-11-10

Family

ID=19815001

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5646/52A Expired GB718134A (en) 1951-03-08 1952-03-04 Improvements relating to girders, particularly for use in mine-roof supports

Country Status (1)

Country Link
GB (1) GB718134A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2936862A (en) * 1954-04-07 1960-05-17 Marcello Germani Welded lattice girders
US3396989A (en) * 1965-12-13 1968-08-13 Kolbe Joachim Weld-fabricated structural member

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2936862A (en) * 1954-04-07 1960-05-17 Marcello Germani Welded lattice girders
US3396989A (en) * 1965-12-13 1968-08-13 Kolbe Joachim Weld-fabricated structural member

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