US2455217A - Joints of hollow beams - Google Patents

Joints of hollow beams Download PDF

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Publication number
US2455217A
US2455217A US537695A US53769544A US2455217A US 2455217 A US2455217 A US 2455217A US 537695 A US537695 A US 537695A US 53769544 A US53769544 A US 53769544A US 2455217 A US2455217 A US 2455217A
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Prior art keywords
planks
cross members
joints
pairs
members
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Expired - Lifetime
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US537695A
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Borges Alberto
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
    • E04C3/16—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with apertured web, e.g. trusses
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/38—Arched girders or portal frames
    • E04C3/42—Arched girders or portal frames of wood, e.g. units for rafter roofs

Definitions

  • This invention relates to a beam and more specifically to a built-up wooden beam or joist. It is an object of the invention to so interconnect two parallel planks with a plurality of cross pieces to form a hollow beam which is useful in roof structures for large spans.
  • the pieces comprising the beam may be readily cut and put together with a minimum of time and labor resulting in a strong structural member with a minimum requirement of timber.
  • a further object resides in the structure of the beam in which two parallel planks are interconnected with a plurality of pairs of cross members connected by dowel pins and reinforced and adjusted by a wedge member.
  • Another object of the invention resides in the method of constructing the beams in which rhomboid openings are cut in the planks, the cross members inserted in the openings and the members provided with dowel pins and finally adjusting the cross members by means of a triangular wedge member.
  • Figure 1 is a plan view of the beam
  • Fig. 2 is a side elevation of a portion of the beam
  • Fig. 3 is an end view partly in section of a detail
  • Fig. 4 is a cross section of two cross members
  • Fig. 5 is an end view of a part of the beam
  • Fig. 6 is a side elevation of the entire beam
  • Fig. 7 is an end view of the beam of Fig. 6, and
  • Fig. 8 is a perspective view of the beam as illus-- trated in Fig. 2.
  • the beam comprises two spaced and parallel planks 9 and I and these planks are interconnected by pairs of cross members II and I2.
  • These cross members project into rhomboid shaped holes or openings 13 in the planks 9 and I0 and as shown on the drawing the cross members are arranged in a plane at right angles relative to the width of the planks.
  • I l and I2 holes are bored into which dowel pins l preferably of wood are inserted.
  • a triangular-shaped wooden wedge member 16 is inserted and this wedge memberacts to adjust the joint l4 relative to the cross members.
  • planks 9 and ID are built flat into the beam, the advantage is attained, particularly when wood is employed as the specific material, that the beam possesses maximum inertia both along a lateral horizontal axis as well as along the vertical axis.
  • the momentum of inertia relative to the vertical axis is of further advantage in that greater spacing between weatherboards are permissible.
  • a beam constructed according to this invention produces a structure which has less total height and greater momentum of inertia along the vertical axis.
  • the latter relates to the method of constructing the beam in which the planks 9 and ID are provided with rhomboid openings or holes 53, the cross members ll and 12 are then inserted in these holes 'with dowel pins 15 to strengthen the members and then inserting the wedge members 16 to strengthen the members.
  • a beam comprising two spaced planks arranged parallel to each other and having a plurality of rhomboid-shaped openings therein, a plurality of pairs of cross members projecting in said openings and interconnecting the planks, said pairs of cross members being angularly arranged between the planks and crossing each other near each plank and forming a triangular space between the crossing and the plank, and a pin passing through and connecting the cross members at each crossing, the planks being arranged so that the widths thereof are face to face in the beam.
  • a beam according to claim 1 in which the pairs of cross members are arranged in zig-zag fashion longitudinally between the two spaced planks.
  • a beam according to claim 1 in which a wedge member is provided in the triangular space to reinforce the joint formed by the crossed cross members.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Joining Of Building Structures In Genera (AREA)

Description

- Nov. 30, 1948.
JOINTS OF HOLLOW BEAMS Filed May 27, 1944 14 seer-o 50/9665,
A. BORGES 2,455,217 7 Patented Nov. 30, 1948 UNITED STATES PATENT OFFICE In Brazil Augu 3 Claims.
This invention relates to a beam and more specifically to a built-up wooden beam or joist. It is an object of the invention to so interconnect two parallel planks with a plurality of cross pieces to form a hollow beam which is useful in roof structures for large spans. The pieces comprising the beam may be readily cut and put together with a minimum of time and labor resulting in a strong structural member with a minimum requirement of timber.
A further object resides in the structure of the beam in which two parallel planks are interconnected with a plurality of pairs of cross members connected by dowel pins and reinforced and adjusted by a wedge member.
Another object of the invention resides in the method of constructing the beams in which rhomboid openings are cut in the planks, the cross members inserted in the openings and the members provided with dowel pins and finally adjusting the cross members by means of a triangular wedge member.
Further objects will be apparent from the following description when considered in connection with the accompanying drawing in which,
Figure 1 is a plan view of the beam,
Fig. 2 is a side elevation of a portion of the beam,
Fig. 3 is an end view partly in section of a detail,
Fig. 4 is a cross section of two cross members,
Fig. 5 is an end view of a part of the beam,
Fig. 6 is a side elevation of the entire beam,
Fig. 7 is an end view of the beam of Fig. 6, and
Fig. 8 is a perspective view of the beam as illus-- trated in Fig. 2.
As shown the beam comprises two spaced and parallel planks 9 and I and these planks are interconnected by pairs of cross members II and I2. These cross members project into rhomboid shaped holes or openings 13 in the planks 9 and I0 and as shown on the drawing the cross members are arranged in a plane at right angles relative to the width of the planks. At the inter section M of the pairs of cross members I l and I2 holes are bored into which dowel pins l preferably of wood are inserted. In the space between the crossed pairs of cross members and the planks a triangular-shaped wooden wedge member 16 is inserted and this wedge memberacts to adjust the joint l4 relative to the cross members.
Since the planks 9 and ID are built flat into the beam, the advantage is attained, particularly when wood is employed as the specific material, that the beam possesses maximum inertia both along a lateral horizontal axis as well as along the vertical axis. The momentum of inertia relative to the vertical axis is of further advantage in that greater spacing between weatherboards are permissible.
Thus a beam constructed according to this invention produces a structure which has less total height and greater momentum of inertia along the vertical axis.
As a further feature of the invention, the latter relates to the method of constructing the beam in which the planks 9 and ID are provided with rhomboid openings or holes 53, the cross members ll and 12 are then inserted in these holes 'with dowel pins 15 to strengthen the members and then inserting the wedge members 16 to strengthen the members.
I claim:
1. A beam comprising two spaced planks arranged parallel to each other and having a plurality of rhomboid-shaped openings therein, a plurality of pairs of cross members projecting in said openings and interconnecting the planks, said pairs of cross members being angularly arranged between the planks and crossing each other near each plank and forming a triangular space between the crossing and the plank, and a pin passing through and connecting the cross members at each crossing, the planks being arranged so that the widths thereof are face to face in the beam.
2. A beam according to claim 1 in which the pairs of cross members are arranged in zig-zag fashion longitudinally between the two spaced planks.
3. A beam according to claim 1 in which a wedge member is provided in the triangular space to reinforce the joint formed by the crossed cross members.
ALBERTO BORGES.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 20,082 Morrison Apr. 27, 1858 64,340 Manley Apr. 30, 1867 1,391,122 Knudsen Sept. 20, 1921 1,445,026 McKeown Feb. 13, 1923 1,944,099 Mearkle Jan. 16, 1934 2,214,935 Perry Sept. 17, 1940 2,248,380 Pedersen July 8, 1941 FOREIGN PATENTS Number Country Date 25,918 Denmark 1920 71,608 Austria Aug. 25, 1916 79,604 Switzerland Apr. 1, 1919
US537695A 1943-08-20 1944-05-27 Joints of hollow beams Expired - Lifetime US2455217A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2780842A (en) * 1950-10-11 1957-02-12 Hess Hanns Girders
US2877510A (en) * 1955-05-19 1959-03-17 Herman L Bruemmer Wall panelling unit
US3078080A (en) * 1957-07-25 1963-02-19 George Windeler Co Ltd Water cooling tower
US3400509A (en) * 1966-11-15 1968-09-10 Glenn W. Setzer Structural improvement
FR2086445A1 (en) * 1970-04-29 1971-12-31 Droge Georg
FR2718175A1 (en) * 1994-03-29 1995-10-06 Lochu Serge Roger Georges Wooden beam with web made of lattice of solid wood embedded in structural timbers
US20120137627A1 (en) * 2010-12-07 2012-06-07 Venkata Rangarao Vemuri Method of forming multi layered netlock girder system
NL2007806C2 (en) * 2011-11-17 2013-05-21 Dalsem Tuinbouwprojecten B V HORTICULTURAL GREENHOUSE.
US20170234011A1 (en) * 2014-08-11 2017-08-17 Patenttitoimisto T. Poutanen Oy Glued timber truss
US11220821B2 (en) 2020-05-04 2022-01-11 Patenttitoimisto T. Poutanen Oy Glued timber trussed joist, joint and method

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20082A (en) * 1858-04-27 Metallic shoe for truss-bridges
US64340A (en) * 1867-04-30 manley
AT71608B (en) * 1914-02-23 1916-04-25 Alfred Schulze Wooden construction to connect the strut and clamp with the belt wood.
CH79604A (en) * 1918-03-05 1919-04-01 Klingler & Leuprecht Wooden truss
US1391122A (en) * 1919-05-05 1921-09-20 Simon D Knudsen Roof-truss
US1445026A (en) * 1920-12-08 1923-02-13 John L Mckeown Truss
US1944099A (en) * 1933-04-12 1934-01-16 Philadelphia Screen Mfg Compan Stepladder
US2214935A (en) * 1939-05-15 1940-09-17 Price W Perry Stepladder
US2248380A (en) * 1940-04-30 1941-07-08 Axel V Pedersen Roof truss

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20082A (en) * 1858-04-27 Metallic shoe for truss-bridges
US64340A (en) * 1867-04-30 manley
AT71608B (en) * 1914-02-23 1916-04-25 Alfred Schulze Wooden construction to connect the strut and clamp with the belt wood.
CH79604A (en) * 1918-03-05 1919-04-01 Klingler & Leuprecht Wooden truss
US1391122A (en) * 1919-05-05 1921-09-20 Simon D Knudsen Roof-truss
US1445026A (en) * 1920-12-08 1923-02-13 John L Mckeown Truss
US1944099A (en) * 1933-04-12 1934-01-16 Philadelphia Screen Mfg Compan Stepladder
US2214935A (en) * 1939-05-15 1940-09-17 Price W Perry Stepladder
US2248380A (en) * 1940-04-30 1941-07-08 Axel V Pedersen Roof truss

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2780842A (en) * 1950-10-11 1957-02-12 Hess Hanns Girders
US2877510A (en) * 1955-05-19 1959-03-17 Herman L Bruemmer Wall panelling unit
US3078080A (en) * 1957-07-25 1963-02-19 George Windeler Co Ltd Water cooling tower
US3400509A (en) * 1966-11-15 1968-09-10 Glenn W. Setzer Structural improvement
FR2086445A1 (en) * 1970-04-29 1971-12-31 Droge Georg
FR2718175A1 (en) * 1994-03-29 1995-10-06 Lochu Serge Roger Georges Wooden beam with web made of lattice of solid wood embedded in structural timbers
US20120137627A1 (en) * 2010-12-07 2012-06-07 Venkata Rangarao Vemuri Method of forming multi layered netlock girder system
US8661764B2 (en) * 2010-12-07 2014-03-04 Venkata Rangarao Vemuri Method of forming multilayered netlock girder system
NL2007806C2 (en) * 2011-11-17 2013-05-21 Dalsem Tuinbouwprojecten B V HORTICULTURAL GREENHOUSE.
US20170234011A1 (en) * 2014-08-11 2017-08-17 Patenttitoimisto T. Poutanen Oy Glued timber truss
US11680405B2 (en) * 2014-08-11 2023-06-20 Patenttitoimisto T. Poutanen Oy Glued timber truss
US11220821B2 (en) 2020-05-04 2022-01-11 Patenttitoimisto T. Poutanen Oy Glued timber trussed joist, joint and method
EP4146877A4 (en) * 2020-05-04 2024-05-01 Patenttitoimisto T Poutanen Glued timber trussed joist, joint and method

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