US2128753A

US2128753A - Steel floor construction

Info

Publication number: US2128753A
Application number: US131985A
Authority: US
Inventors: Lienhard Frederick
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-03-20
Filing date: 1937-03-20
Publication date: 1938-08-30
Anticipated expiration: 1955-08-30

Description

Aug. 30, 1938. F. LIENHARD STEEL FLOOR CONSTRUCTION Filed March 20, 1937 ll ll llllmllm INVENTOR l l I I I I I flew-War A/flwmm zIIIIHIHIm I II Patented Aug; 30, 1938 l UNITED STATES PATENT OFFICE Frederick Lienhard, New York, N. Y. Application March 20, 1937, Serial No. 131,985

9 Claims.

This invention relates generally to steel floor constructions. More particularly, it relates tothe type of assembled steel floor constructions known as open gratings and adapted to be used as flooring for bridges and the like.

One of the objects of my invention is to provide a steel floor construction, of the character described, which shall comprise relatively few and simple parts, which shall be easy to assem-* m ble, and in which the saidparts are so standardized that large quantities may be manufactured at a minimum cost; and stocked to be subsequently assembled and used for any size or type of steel flooring desired, depending upon the actual conditions. e

Another object of my invention is to provide a steel floor construction of the character described, comprising a plurality of assembled steel bars forming a grating having a plurality of equal rectangular surface openings in which said steel bars are all of the'same uniform thickness to af- Still another object of my invention is to provide a steel floor construction of the character described in which the open rectangular spaces of the surface thereof may be varied in size without varying the construction of the individual steel bars and without weakening the entire assembly.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elements,

5 and arrangement of parts which will be exemplified in the construction hereinafter described, and of which the scope of applicationwill be indicated in the following claims.

In the accompanying drawing, in which is 40 shown one of the various possible embodiments of this invention,

Fig. 1 is a perspective view of an assembled steel floor construction embodying my invention;

45 Fig. 2 is an enlarged side elevational view of .one of the series of m'ain steel bar members illustrated in Fig. 1;

Fig. 3 is an enlarged side elevational view of the second series of steel bar members illus 50 trated in Fig. l; and

' Fig. 4 is an enlarged side elevational view of the third series of steel bar members illustrated in Fig.1.

Referring now in detail to the drawing, there is disclosed in Fig. 1 an assembled metal open sired in the top surface of the grating.

grating adapted for use as flooring for bridges and the like and constructed in accordance with my invention. The assembled grating comprises a series of parallel main bars Ill, ll, I2 and I3, disposed in predetermined spaced relationship to 5 each other and which may be aided in load distribution by a distributor bar l5 of any desired strength, depending upon the particular needs of the proposed construction. Each of the main bars Ill to 13 are provided with a, plurality of 10 substantially rectangular shaped openings I6 with the longer sides of the rectangles disposed parallel to the longitudinal axis of the said main bars. The openings l6 are spaced from each other a uniform predetermined distance depend- 16 ing upon the ultimate size of the rectangles de- The openings E are designed to permit the insertion therein a d the proper positioning of two cross 7 bars 20, each of which is provided at the upper 20 end thereof with a plurality of uniformly spaced ford an even riding surface for vehicular trafnotches 2| of uniform width and depth, for reasons which will soon become apparent.

It is noted that the openings I6 are provided with notches 22 at opposite corners of the bottom 25.

wall thereof. These notches are designed to fa-- cilitate the insertion and proper upright positioning of the members 20in the openings Hi. The openings is are made of suflicient size so that the members 20 may be' inserted there- 30 through in a fiatwise direction and then turned upwardly so that one of the notches 2! will straddle the portion of the bar I0 above the openings iii and thus permit the member 20 to be positioned in the notch 22' d stand in a vertical direction contacting t e end walls I60. of "the openings l6. When e cross bars 20 are thus inserted in the openi gs It, the top edges thereof will be flush with the top edges of the main I bars to it. The openings l6 are designed to 40 accommodate two of the members 20 at opposite ends thereof so that the distance between the openings l 6 will be large enough to prevent weakening of the main bars. If the openings l6 were of such size as to permit the insertion and accommodation of only one of the members 20 therein, it is clear that in the event an open grate construction was desired in which the rectangular openings at the top thereof were of very small size; there would be insumcient metal between the openings IE to give suflicient strength to the assembled structure. After the main bars ill to l3 have been suitably spaced from each other in accordance with the needs of the particular construction, and Ii two transverse or cross bars 20 are inserted through each of the openings l6 and rotated to proper vertical position, the remaining notches 2| in the bars 20 may be filled by a third series of bars 30 of a depth equal to the depth of the notches 2| and disposed parallel to the main bars III to IE! to form an assembled open grating having a plurality of rectangular openings at the top surface thereof. After the members have been assembled as above described, the entire construction may be welded together to maintain the different parts in position.

By arranging the notches 2| in the cross bars 20 equidistant from each other and making them ali of the same size, it is possible to adjustably space the main bars I to 53 from each other, in order to fit any particular constructional needs. Thus, for example, as shown in Fig. 1, the main bar H is spaced from the main bar I0 so that there are three intermediate notches 2|, in the cross bars 20 which receive therein the bars 30. If desired, the main bar I! may be spaced from the main bar II to accommodate only two bars 30 therebetween; whereas, the main bar l3 may be spaced from the main bar l2 to accommodate only one bar 30 therebetween. Also, by the above described construction, it is seen that a main bar, such as "I, may be placed near the edge of any desired open grating and maintain the full strength of the grating right up to the edge because it can be placed suiiiciently near to the adjacent main bar I I. In other words, the assembled grating constructed in accordance with my invention achieves a uniform strength throughout its width.

It is noted that the three types of bars, I0, 20 and 30 may be made of uniform width to provide a uniform riding surface for vehicular trafiic.

It will thus be seen that there is provided a device in which the several objects of this invention are achieved, and which is well adapted to meet the conditions of practical use:

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiments above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A grating of the character described formed of a plurality of series of bars extending in intersecting relation, the-bars of one series being provided with a plurality of uniformly spaced and equal sized openings, two bars of a second of said series of bars-being inserted through each of said openings, the bars of said second series being wider than the height of said openings and provided with a plurality of uniformly spaced equal notches extending downwardly from the upper edges thereof to permit the upright positioning of said second series of bars in said openings, and at least one bar of a third series of bars disposed parallel to and between each pair of adjacently disposed bars of said first named series of bars.

2. A grating of the character described formed of a plurality of series of bars extending in intersecting relation, the bars of one series being provided with a plurality of uniformly spaced and equal sized openings, two bars of a second of said series of bars being inserted through each of said openings, the bars of said second series being wider than the height of said openings and provided with a pluralityof uniformly spaced equal notches extending downwardly from the upper edges thereof to permit the upright positioning of said second series of bars in said openings, said openings being provided with notches at opposite corners of the bottom wall thereof to facilitate the upright positioning and the maintenance in such position of said last named bars, and at least one bar of a third series of bars disposed parallel to and between each pair of adjacently disposed bars of said first named series of bars.

3. A grating of the character described formed of a plurality of series of bars extending in intersecting relation, the bars of one series being provided with a plurality of uniformly spaced and equal sized openings, a bar of a second of said series of bars being inserted through each of said openings, the bars of said second series being provided with a plurality of uniformly spaced equal notches extending downwardly from the upper edges thereof, and a third series of bars disposed parallel to the bars of said first series and received in said notches, whereby to form a' grating having a plurality of uniform rectangular shaped open spaces of a size equal in one direction to the distance between two adjacent bars of the second series of other direction between two adjacent bars of the first series of bars.

4. A grating of the character described formed of a plurality of series of bars extending in intersecting relation, the bars ofv one series being provided with a plurality of uniformly spaced and equal sized openings, two bars of a second of said series of bars being inserted through each of said openings, the bars of said second series being wider than the height of said openings and provided with a plurality of uniformly spaced equal notches extending downwardly from the upper edges thereof to permit the upright positioning of said second series of bars in said openings, said openings ing rectangular in shape and disposed with their anger sides parallel to the iongitudinal axis of the bars of said first series, said notches of said second series bars being so constructed and arranged whereby at least one notch of each bar of said second series of bars will be disposed between each pair of bars of the said first series of bars, and bars of a third series of bars parallel to the bars of said first series of bars and received in the notches of said second series of ars. ,1

5. A grating oi the character described formed of a plurality of series of bars extending in intersecting relation, the bars of one series being provided with a plurality of uniformly. spaced and equal sized openings, two bars of a second of said series of bars being inserted through each of said openings, the bars of said second series being wider than the height of said openings and provided with a plurality of uniformly spaced equal notches extending downwardly from the upper edges thereof to permit the upright'positioning of said second series of bars in said openings, said notches being vertically disposed an at right angles to the longitudinal axis of s (1 second series bars, and at least one bar of a third series of bars parallel to the bars of said first series and received in the corresponding notches of the said bars of said second series.

6. A grating of the character described formed of a plurality of series of bars extending in intersecting relation, the bars of one series being provided with a plurality of uniformly spaced and equal sized openings, two bars of a second of said series of bars being inserted through each of said ars and less than the distance in the openings, the bars of said second series being wider than the height of said openings and provided with a plurality of uniformly spaced equal notches extending downwardly from the upper edges thereof to permit the upright positioning of said second series of bars in said openings, said openings being rectangular in shape and disposed with their long'er sides parallel to the longitudinal axis of the bars of said first series, and adapted to form argrating assembly in which the upper surface thereof constitutes a plurality of open spaces rectangular in shape and of uniform size, said notches of said second series bars being so constructed and arranged whereby at least one notch of each bar of said second series of bars will be disposed between each pair of bars of the said first series of bars.

7. A grating of the character described formed of a plurality of series of bars extending in intersecting relation, the bars of one series being provided with a plurality of uniformly spaced and equal sized openings, at least one bar of a second of said series of bars being inserted through each of said openings, the bars of said second series being wider than the height of said openings and provided with a plurality of uniformly spaced equalnotches extending downwardly from the upper edges thereof to permit the upright positioning of said second series of bars in said openings, and bars of a third series received in the notches of the said second series bars disposed between said first series bars, whereby to form a in the same plane and in which the upper surface thereof constitutes a plurality of open spaces rectangular in shape and of uniform size, said size being equal in one direction to the distance between two adjacent cross bars and in the other direction less than the distance between two main bars.

9. A metal grating assembly adapted to beused as flooring for bridges and the like formed of a plurality of series of bars extending in intersecting relation, certain of the bars of said first series of bars being unequally spaced from each other, all of the bars of said first series being provided with a plurality of uniformly spaced and equal sized rectangular openings, two bars of a second series of bars being inserted through each of said openings, said second series bars being wider than the height 'of said openings and provided with a plurality of uniformly spaced notches extending downwardly from the upper edges thereof to permit upright positioning of said second series of bars in said openings, and a third series of bars parallel to said first series of bars and received in the notches of said second series of bars whereby to form a grating assembly in which the upper surface thereof constitutes a plurality of open spaces of uniform shape and size irrespective of the spacing between the bars of said first series of bars.

FREDERICK LIENHARD.