US1238858A - Apparatus for constructing ribbed concrete floors. - Google Patents

Description

A. J. WIDMiiH.

APPARATUS FOR CONSTRUCTING RIBBED CONCRETE FLOORS.

APPLICATION man DEC.1. X916,

1 238 858. Patent-edfiept. 4, 1917. F 2 SHEETSSHEET 11" A. J. WIDMER. APPARATUS FOR CONSTRUCTING RIBBED CONCRETE FLOORS.

APPLICATION FILED DEC. 1916 1,238,858. Pa-tentedSept. 4,1917.

2 SHEETSSHET 2.

172 px 17 m 17 5/4 3:5 a jh APPARATUS FOR. CONSTRUCTING RIBBED CONCRETE FLOORS.

Specification of Letters Patent.

Patented Sept. 4, 1917.

Application filed December 1, 1916. Serial No. 134,288.

7' all whom it may concern:

Be it known that I, ARTHUR J. VVIDMER, a citizen of the United States, and a resident of \Vebster Groves, in St. Louis and State of Missouri,-have in- Vented a new and useful Improvement in Apparatus for Constructing Ribbed Concrete Floors. of which the following is a specification.

This invention relates particularly to the centering and forms for the floors of build ings of two or more stories in hei ht, and has for its objects to save lumber in the construction of the centering, and to permit the floor forms to be used repeatedly. Further objects are to arrange the centering for supporting the forms so as to expedite the erection of the centering and forms, and so as to permit easy removal of the forms apart from the centering, which may be left in place uutii the Hour has set sufficiently to support itsell and the loads which may come upon it.

The invention consists in arranging the joists for supporting the forms for the ribs and panels in rows extending crosswise of the ribs and spaced about four or more feet apart, the tops of these joists being even with the lower edges of the ribs, and resting the ends of the forms for the ribs and panels upon removable cleats or strips which are detaehably secured along the Sides of the joists, the gaps over the j(. ts between the ends of the forms being filled with sheet metal shields which rest upon the joists or upon the ends of the forms.

l urthcr objects and details of the invention appear in the following description thereof. reference being bad to the accompanying drawings, which show the invention in several forms.

In the drawings, wherein the same reference characters designate the same or similar parts in the several views,

Figure l is a vertical sectional view of a floor, the section being taken parallel to and between the ribs, the forms t'or the ribs .ind panels being shown in elevation at the lefthand side of the figure;

the county of I Fig. 2 is a top plan view of the forms shown in Fig. 1, showing them partly removed to disclose the centering beneath; Fig. 3 is a vertical floor shown in Fig. 1, transversely of the ribs, on the line 3-3 in Fig. 1, looking in the direction of the arrows; 4

Fig. 4 is a similar view taken on the line in Fig. 1, looking in the opposite direction to Fig. 3;

Fig. 5 is a view like Fig. 1, showing the centering in place for supporting the floor after the forms for the ribs and panels have been removed;

Fig. 6 is a vertical sectional view of a portion of a floor, the section being taken parallel to and between the ribs, showing a. modified form of centering and forms;

Fig. 7 is a transverse vertical sectional view of the same, the section being taken on the line 7-7 in Fig. 6 looking in the direction ofthe arrows;

Figs. 8, 9, 10 and 11 are transverse vertical sectional views showing various modifications of the forms for the ribs and panels;

Figs. 12 and 13 are sectional views similar to Figs. 6 and 7,. respectively, showing another modification of the centering and means for supporting the forms for the ribs and floors;

Figs. 14 and 15 are sectional views similar to l igs. 12 and 13, showing a further modification of the means for supporting the forms for the ribs and floors; and

igs. l6 and 17 are side views of difi'erent hangers for the cross pieces which support the forms for the ribs and floors, showing them in place on the joists.

he type of floor shown in the drawings consists of a thin slab of concrete 20 having parallel ribs 2] on its under side for strengthening it between the points of support, such as the wall 22 and the beam 23. The floor is molded in forms made of wood or metal which are shaped to conform to the shape of the under side of the fioor and ribs, and which are supported on suitable centering.

sectional view of the I In the construction shown in Figs. 1 to 5, inclusive, the forms for the beams 23 are wooden troughs consisting of bottom boards 24, side boards 25 and top boards 26, supported on cross pieces 27 which are spiked to posts 28. The posts 28 are arranged in pairs, one post of each pair on each side of the beam, and are spaced far enough away from the sides of the beams to permit the latter to be lined up on the cross pieces without diiiiculty.

The forms for the iloor and ribs consist of sollit boards :29 for supporting the lower edges otthe ribs :21. and inverted wooden or metal troughs 30 which have slanting sides and which tit between the ribs and conform to the sides of the ribs and under face of the lloor slab. The adjacent ends of the troughs 30 are spaced apart, and metaL shields or hoods 31 are used for covering the gaps between them. At the ends of the ribs 21 the troughs may be closed, or covered by metal hoods 31 having their exposed ends closed by wooden or metal end pieces 32. The troughs 30 and sol'lit boards 2!) are in short lengths of four tpet or thereabout, easy to make and to handle. and not easily broken or warped out of shape.

The sotiit boards 25) and troughs 30 are supported at their ends on cross pieces or stringers 33 which are detach-ably secured to joists 34 arranged crosswise of the ribs and supported on rows of intermediate posts 35. The nearest joists to the beam 23 are supported on the tops of the posts '28. The tops of the joists IH are flush with the tops of the soltit boards 29 so as to support the under sides of the ribs 21. The soiiit boards and troughs are cut a trifle shorter than the spaces between the joist 31 to permit them to swell somewhat. The hoods 31 have flanges 36 on the lower edges of their side walls which rest on the joists Ill and till the gaps between the ends of the sotiit boards 29. The ends of the end hoods are closed.

The stringers 33 for carrying the ends of the sotlit boards and troughs may be supported in any convenient manner for letting 1cm down in advance of the joists 34. In Jigs. 1 to 5 they are shown spiked to the joists. In Figs. 6 and 7 they are supported by cleats 37, which cleats are spiked to the posts 3.").

The troughs 31) and softit boards 29 may be constructed in various ways. In Figs. 6 and 7 the construction is entirely of wood, even to wooden fillers 38 for bridging the gaps between the ends of the troughs. Fig. 8 shows troughs made of wood and provided with lateral flanges 39 on their lower edges to take the place of the sotiit boards. Fig. 9 shows metal sotlit ieces 40 arranged between the trough's. he sotfit pieces 40 have edge flanges 41 for stiffening them, and by varying the width of the flanges 41 the height of the soflit boards above the stringers 33 may be adjusted to suit difl'erent depths of ribs 21 without changing the size of the troughs 30.

Fig. 10 shows metal troughs 42, having flanges 43 along their edges for supporting the sottit board 29. 11 shows similar metal troughs 4.. the angcs 15 along the edges of the troughs being wide enough to meet under the middle of the rib 21, thereby dispensing with any sofiit board.

Figs. 12 and 13 show another manner of supporting the stringers 33 to permit of their ready removal in advance of taking down the oists 3-1. The stringers are sup- :orted on brackets 46 which straddle the oists 34, and hook under the stringers. The hook ends of the brackets 510 e upward away from the joists, and bloc rs 47 hold the stringers 33 at the outer upper ends of the sloping hooks. By knocking out the blocks 47, the stringers can be let down toward the joists and the forms pulled down.

In Figs. 14 and 15, the stringers 33 are supported on wooden brackets -18 which are suspended from hangers 49 consisting of a top plate resting on the joist and two loops 50 pivoted to the top plate one on each side ot' the joist. the lower end of each loop 50 assing under the outer lower edge of a brae ct 48 and resting in a shallow groove therein. By swinging the loops )0 down against the joist 34 the brackets 48 can be readily removed to lower the stringers 33 and forms for the floor in advance of removing the joists 34.

Fig. 16 shows another form of hanger 51 for supporting the stringers 33, having its the joists 34 by |neans', of

hook ends sloping downwardly and support- .outer ends for preventing them becoming separated from the brackets.

Fig? 1'. shows a metal stringer 55 of angle shape for supporting the troughs. A wedge .36 is driven between the body portion of the hanger 57 and the. vertical leg of the angle stringer to clam it against the flange 58 at the outer end 0% the hook portion.

It is evident that other modifications in the details of construction of the centering and forms can be made, and-theinventioa is not restricted. to the forms shown and described.

I claim the following as my invention:

1. In apparatus 'for constructing ribbed concrete floors, joists extending crosswise of the ribs and with their tops even with the. under sides of the ribs to support them, seetions of forms for the ribs andifloor arranged between said joists with their ends supported'therefrom, the ends of said sections being spaced apart leaving gaps over said joists, and short sections separable from said forms covering said gaps.

2. In a paratus for constructing ribbed concrete oors, joists extending crosswise of the ribs and with their tops even with the under side of the ribs to support them, stringers detachably secured alongside of said 'oists, sections of forms for the ribs and oor arranged between said joists a. a supported on sald stringers th ends of said forms being spaced apart leavi g ga s over said joists, and short sections separa'b e from said forms covering said gaps.

3. A paratus for constructing ribbed concrete oors comprising a joist extending crosswise of the ribs, the top of the .joist supporting the under sides of the ribs, forms arranged on each side of the joist at right angles, thereto and rejecting above the joist between the ri s, said forms being spaced apart at their ends with the joist be tween them, and shields arranged oveathe joist and forming continuations pf the forms across the spaces between thcirends.

4. Apparatus for constructingzribbed'concrete floors eomprising'a joist extending cromwise beneath the ribs,- the top of the joist supporting the under sides of the ribs, floor fmmsan'mn ed on each side of the joist and projecting above-the jo'istbetween .the ribs, said floor form's being spaced apart at their ends with the joist between them, soiiit boards arranged beneath the ribs and spaced from the joist at their ends. and s ields arranged over the joist and forming continuations of the floor forms across the spaces between their ends, said shields having portions underlying the bottoms of the ribs and resting upon the top of -the joist for bridging the spaces between the ends of the soflit boards.

5. A paratus for constructing ribbed con-.

crete oors comprising a joist extending crosswise of the ribs, the top of the joist supporting the under sides of the ribs, floor forms arranged on each side of the joist and projecting above the joist between the ribs, stringers for supporting the ends of said floor forms, and means for removably securing said stringers to said joist, said means being arranged over the joists in the spacesbetween the ribs.

6. Apparatus for constructing ribbed concrete floors comprising) lengths of forms ar ranged in succession etween the ribs with gaps between the ends of successive forms, stringers extending transversely of the ribs at said gaps, said forms being supported. Sflljd transverse stringers, and shields ranged over the stringers and forming continuations of the forms acros said gaps.

7. A paratus for eonstiucting ribbed me crete 'oors comprising a joist extending crosswise of the ribs, the top of the joist supporting the under sides of the ribs, floor forms arran ed on each side of the joist and pro'ecting a ove the joist between the ribs, sai floor forms bein spaced apart at their ends with the joist etween them, the adjacent-ends of said floor forms being open, and hangers straddling on said joist between the ribs for supporting said floor forms.

8. Apparatus for constructing ribbed con crete floors comprising a joist extending crosswise of the ribs, the top of the joist supporting the under sides of the ribs, floor forms arranged on each side of the 'joist and projecting above the joist be tween the ribs, said floor forms being spaced apart at their ends with the joist between them, the ends of said floor forms being spaced from said joist, and hangers straddling said joist between the ribs for sup- .porting said floor forms, said hangers being arranged to permit 'said floor forms to be lowered with-out removing said joist.-

9. Apparatus for constructing ribbed concrete floors comprising a joist extending crosswise of the ribs, the top of the joist supporting the under sides of the ribs, floor forms projecting above the joist between the ribs, the ends of said floor forms being clear of said joist, and hangers on said joist, said hangers carr \'ing supports for said floor forms arranged to permit said floor forms to be lowered without removing said joist. I i

10. Apparatus for constructing ribbed concrete floors comprising a continuous slipporting member extending crosswise of the ribs beneath their under sides for supporting them, floor forms projecting above said supporting member and having portions extending between the ribs, the ends of said floor forms being spaced apart to clear the sides of said supporting member, means arranged over said supporting member across the spaces between the ends of said forms for supporting the portion of the floor over the supporting member, and means carried by said supporting member for supporting said floor forms, said means for supporting the forms being arranged for removal independently of said supporting member to permit the forms to be lowered without disturbing the supporting member.

11. Apparatus for constructing ribbed concrete floors comprising forms for the ribs arranged in sections in longitudinal alinement with gaps between the ends of alining sections, transverse supports for said ribeae ranged beneath them at said gaps, means at;

the ends of said sections by said transverse supports and held up shields arranged over bridging said gsps.

12. .Apparetus for concrete crosswise of the ribs at intervals, sectional f floor between the joists,

masses whereby they are the supports and constructing ribbed floors comprising oists extending for supportlng them orms supportin the said sections! orms having their ends free of the joists, and supports for said forms, said supports being supported on said joists in the spaoes between the ribs a'nd'being removable to permit the lowerinfg of said sectional forms independently 0 said joists.

Signed at St. Louis, Missouri, this 29th day of November, 1916.

ARTHUR J. WIDMER.

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