US424798A - Composite girder - Google Patents
Composite girder Download PDFInfo
- Publication number
- US424798A US424798A US424798DA US424798A US 424798 A US424798 A US 424798A US 424798D A US424798D A US 424798DA US 424798 A US424798 A US 424798A
- Authority
- US
- United States
- Prior art keywords
- girder
- composite girder
- composite
- wood
- beams
- 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 - Lifetime
Links
- 239000002131 composite material Substances 0.000 title description 12
- 210000000614 Ribs Anatomy 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000002023 wood Substances 0.000 description 8
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 101700064026 EXT1 Proteins 0.000 description 2
- 101710002310 RNASE1 Proteins 0.000 description 2
- 101710022611 RNASE1B Proteins 0.000 description 2
- 230000003190 augmentative Effects 0.000 description 2
Images
Classifications
-
- 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
- E04C3/14—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with substantially solid, i.e. unapertured, web
Definitions
- My invention consists of an improvement in that form of composite girders known as Flitch girders, in which a metal plate is clamped between flanking beams of wood, the object of my invention being to so construct a girder of this character that without materially increasing the expense of the same its strength may be considerably augmented.
- This object I attain in the manner hereinafter set forth, reference being had to the accompanying drawing, which represents a sectional perspective view of a composite girder constructed in accordance with my invention.
- the girder comprises the central plate or beam A, of iron or steel, and flanking beams B, of wood, fitting snugly to said central metallic beam and firmly clamped thereto by means of bolts a and nuts to, disposed at appropriate intervals throughout the length of the beamor girder.
- the central metallic beam A is thickened, so as to form a beveled rib 1), whereby the longitudinal stiffness or rigidityof the metal beam is materiallyincreased as compared with a fiat plate-beam, this increase in rigidity of the metallic beam being effected without materially increasing the labor or expense of fitting the flanking beams of wood thereto, as the simple wooden beams, so as to impart thereto abevel similar to that of the rib b, is all that is necessary in order to insure the snug fitting of said flanking beams to the central metallic beam of the girder.
- the beveled ribs 1) can, moreover, be produced upon the beam A with very slight changes in the ordinary rolls which are required to produce an ordinary flat bar or plate; hence the expense of the beam, with its beveled ribs, is but little more than that of said plain flat bar or plate and much less than that of an I-bar or other form of shaped or structural iron or steel beam.
Description
(No Model.)
J. D. L LL. OOMPOSIT DER.- No. 424,798. Patented Apr. 1,1890.
' Wibiossw ,l zwaniaz' r M )6 5 JamwJ.Za/zeZ6 i UNITED STATES PATENT ()EEICE.
JAMES D. LAZELL, OF PHILADELPHIA, PENNSYLVANIA.
COMPOSITE GIRDER.
SPECIFICATION forming part of Letters Patent No. 424,798, dated April 1, 1890. Application filed January 25, 1890. Serial No. 338,111- (No model.)
To all whom it may concern:
Be it kn own that 1, JAMES D. LAZELL, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Composite Girders, of which the following is a specification.
My invention consists of an improvement in that form of composite girders known as Flitch girders, in which a metal plate is clamped between flanking beams of wood, the object of my invention being to so construct a girder of this character that without materially increasing the expense of the same its strength may be considerably augmented. This object I attain in the manner hereinafter set forth, reference being had to the accompanying drawing, which represents a sectional perspective view of a composite girder constructed in accordance with my invention.
The girder comprises the central plate or beam A, of iron or steel, and flanking beams B, of wood, fitting snugly to said central metallic beam and firmly clamped thereto by means of bolts a and nuts to, disposed at appropriate intervals throughout the length of the beamor girder. At and near each edge the central metallic beam A is thickened, so as to form a beveled rib 1), whereby the longitudinal stiffness or rigidityof the metal beam is materiallyincreased as compared with a fiat plate-beam, this increase in rigidity of the metallic beam being effected without materially increasing the labor or expense of fitting the flanking beams of wood thereto, as the simple wooden beams, so as to impart thereto abevel similar to that of the rib b, is all that is necessary in order to insure the snug fitting of said flanking beams to the central metallic beam of the girder. The beveled ribs 1) can, moreover, be produced upon the beam A with very slight changes in the ordinary rolls which are required to produce an ordinary flat bar or plate; hence the expense of the beam, with its beveled ribs, is but little more than that of said plain flat bar or plate and much less than that of an I-bar or other form of shaped or structural iron or steel beam.
Having thus described my invention, therefore, I claim and desire to secure by Letters Patent- The within-described composite girder, consisting of a central metallic beam having beveled ribs at the opposite edges, and flanking beams of wood, having their corners chamfered to fit snugly to the beveled ribs of the metal beam, substantially as specified.
In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.
' JAMES D. LAZELL.
\Vitnesses:
EUGENE ELTERICH, HARRY SMITH.
chamfering of one corner of each of said
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US424798A true US424798A (en) | 1890-04-01 |
Family
ID=2493712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US424798D Expired - Lifetime US424798A (en) | Composite girder |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US424798A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2601910A (en) * | 1944-05-16 | 1952-07-01 | Thomas F Nichols | Composite structural member |
| US5685114A (en) * | 1995-03-20 | 1997-11-11 | Tanaka Masakatsu Design Office Co., Ltd. | Structural member, floor structure, and roof structure for wooden building and a method of building with the same |
| US20120317905A1 (en) * | 2011-06-14 | 2012-12-20 | Macduff Matthew | Load-bearing member with hollow fastener |
| US10443239B2 (en) * | 2016-12-02 | 2019-10-15 | Columbia Insurance Company | Long span masonry lintel support system |
-
0
- US US424798D patent/US424798A/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2601910A (en) * | 1944-05-16 | 1952-07-01 | Thomas F Nichols | Composite structural member |
| US5685114A (en) * | 1995-03-20 | 1997-11-11 | Tanaka Masakatsu Design Office Co., Ltd. | Structural member, floor structure, and roof structure for wooden building and a method of building with the same |
| US20120317905A1 (en) * | 2011-06-14 | 2012-12-20 | Macduff Matthew | Load-bearing member with hollow fastener |
| US10443239B2 (en) * | 2016-12-02 | 2019-10-15 | Columbia Insurance Company | Long span masonry lintel support system |
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