US2489808A - Method of erecting concrete floor forms - Google Patents

Description

NOV. 29, 1949 QVERESCH 2,489,808

METHOD OF ERECTING CONCRETE FLOOR FORMS Filed Jan. 10, 1947 3 Sheets-Sheet l INVENTOR. ALBERT G. OVERESCH.

ATTORNEYS 1949 A. G. OVERESCH METHOD OF ERECTING CONCRETE FLOOR FORMS Z5 Sheets-Sheet 2 Filed Jan. 10, 1947 INVENTOR.

H M @J V M w w mix A Dill]! ATTORNEYS 9 1949 A. G. OVERESCH METHOD OF ERECTING CONCRETE moon FORMS Filed Jan. 10, 1947 3 Sheets-Sheet 3 FIG. I I

FIGJO mmvrox. ALBERT q. OVERESCH. BY

AT TO R EYS Patented Nov. 29, 1949 METHOD OF ERECTING CONCRETE FLOOR FORMS Albert G. Overesch, Cincinnati, Ohio Application January 10, 1947, Serial No. 721,273

8 Claims.

This invention pertains to improvements in a method for the construction of reinforced concrete buildings and the like.

One of the objects of this invention is to provide an improved method of erection of concrete floor forms utilizing the column forms for supporting all of the form work.

Another object of this invention is to provide an improved method of erection of concrete floor forms which may be accomplished with greater economy and speed and with a minimum of materials being required.

Still another object of this invention is to provide a method for erecting concrete floor forms which requires a minimum of lumber and is facilitated by the total elimination of all shores, the column forms being utilized for supporting all of the form work.

Another object of this invention is to provide an improved method of erecting concrete floor forms which requires no scaffolding in putting up and taking down the various form work.

' It is also an object of this invention to provide an improved system of erecting concrete floor forms which provides a clear work space while the concrete is curing to permit other trades to start Work including laying out of partitions and v the like while the concrete is curing.

Still another object of this invention is to provide a method of erection of concrete floor forms which may be erected with greater safety to the workmen and which permits of lowering of liability rates of insurance during the construction stages of the building.

And it is a still further objectof this invention to provide an improved method in which no debris or off-fall of form materials results.

Further features and advantages of this invention will appear from a detailed description of the drawings in which:

Figure 1 is a plan view showing a portion of manipulatiomand positioning of the forms.

a building with the various columns and the concrete floor form work in position ready for pouring the concrete.

Figure 2 shows the-lift truck in proper position relative to a panel to be formed and with I beams placed on the elevating device of the lift truck chassis so that the load of the concrete floor form work is properly distributed and with the device in lowered position.

I Figure 3 shows the lift truck in lowered position with the trusses pinned together for the proper length of panel and placed across the I beams so as to be located adjacent to the columns.

Figure 7 is a view showing a series of form.

supporting trusses connected together and supported on a column form.

Figure 8 is an enlarged fragmentary plan section on the line 8--8 of Figures 6 and 11.

Figure 9 is a fragmentary vertical section on the line 99 of Figure 6.

Figure 10 is an enlarged fragmentary sectional view on the line l0--I 0 of Figure 1.

Figure 11 is an enlarged fragmentary sectional view on the line lI-ll of Figure 1.

Figure 12 is an enlarged fragmentary sectional view on the line l2--I2 of Figure 1.

In carrying out the method of erection of concrete floor forms of this invention, the centering or position of the columns, such as the columns l5 through 23, inclusive, in Figure 1,

is determined. For example, four panels A, B, C, and D are thus determined which are to be finished with a poured concrete floor slab. Each of the panels is thus prepared with the novel forms which are carried on the column forms used to pour the columns l5 to 23, inclusive, these column forms forming the sole support for positioning and holding the floor form inv position during the pouring and curing of the concrete floor.

After the column centering is determined, each of the panels, such as the panels A, B, C, and D, is prepared by a uniquemethod of assembly, A lift truck 24 is the primary support for manipulating, raising, and lowering the floor form assembly. The lift truck is moved into position on .the previously completed iioor below to proper relative position under one of the panels, such as the panel A, as indicated in Figure 2. This lift truck is provided with. lifting devices comprising members 25 and 26 having cross members 27 on the outer ends of which are mounted I beams 28 and 29 suitably positioned and formed.

so that the load of the floor form to be carried thereon is properly distributed relative to the lift truck 24. This entire frame structure or device is movable vertically by power drive from 3 the lift truck in any well known and suitable manner.

With the frame work and I beams 28 and 29 in the lowered position, a pair of floor form trusses 3!] and 3|, Figure 3, are mounted on and clipped to the I beams 28 and 29 at 3|a in a well known manner. The trusses 30 and 3| are preferably of adjustable type and are pinned together in any suitable manner at 32a so as to accommodate their length to'properly fit the respective panel to be formed, preferably with the end portions such as 39a and 30b, Figure 3, properly overlapping the sides |a and Illa of the columns l5 and I8, respectively.

Having thus properly located and adjusted the trusses 3S and 3| on the lift truck 26, open web adjustable joists 32 are now placed across the trusses 30 and 3|, as shown in Figure 4, and securely fastened into place on the trusses at 33 by any suitable clamping devices. These open web joists 32 extend parallel to the I beam members 28 and 29 of the lift truck device. Metal soflits 33a having clips 332) are snapped onto the tops of the joists 32, as best shown in Figure 12, to automatically clamp and hold the soflits on top of the joists.

Having thus rigidly secured the joists to the trusses 3|] and 3| and applied the soffits to the top of the joists, the spaces between the soifits are filled by installing removable metal pans 34, of conventional type, and locking them securely by means of suitable pins or other bolting means 3, Figure 12, so that they may readily be pulled down away from the poured concrete floor by removal of the pins 3 to assist in the curing of the floor and to facilitate the use of the pans promptly for installation in forming up subsequent panels.

All of the above floor form assembly, including the I beams 28 and 29, the trusses 39 and 3|, the joists 32, the soffits 33a, and the removable pans 34 are assembled as described while the lift truck members 25, 26, and 21 are in a lowered position so that the entire assembly may be put together by workmen while standing on the floor level upon which the lift truck is positioned. In other words,

the entire floor form assembly is put together at a convenient normal working height for the workmen without the use of scaffolds, ladders, and other supplementary platforms.

The floor form assembly is now raised by the lift truck 28 up to and slightly above the exact position it is to be placed in for the pouring of the floor. The forms for the columns are now set up. These comprise 2 bar members 35, which are assembled to proper width and height, and a pressed wood panel 36 suitably attached to the faces 35a of the 2 bars 35, Figure 8, as by means of a suitable adhesive cement. This panel assembly is then positioned to form the column and so placed that the trusses form a bearing at 31 for the trusses 3i} and 3|. These bearings are adjusted to exact height by means of suitable screw jacks 38 and the 2 bars wedgin'g blocks 39, Figure 6, to the exact height desired at the point 31. The trusses and form assembly are then lowered by the lift truck onto the bearings 31" of the 2 bars 35 and securely pinned thereto in any suitable manner. Wood blocking may be placed around the base of the column to fill in the space Mi to form a proper base portion of the column when poured.

The adjacent trusses and floor forms for the other panels adjacent to the first mentioned panel are similarly set up-in the same way and the inthe column forms, the lift truck is fully lowered away from the floor form assembly so that it may now be moved over to another panel torepeat the aforementioned process. Short horizontal angles 46 and 41, Figure 6, are then pinned at 48 and 49, respectively to the ends of the trusses and 3| and a pressed wood form panel 50 applied thereto to close the space between the ends of the trusses for forming that portion of the column.

Beam forms supported on suitable open web adjustable joists 52 are arranged to form the beams 53, Figure 6 and 10, while further beam forms 56, Figure 11, are set in place to form the cross beams 55. Their ends are appropriately closed up to properly fit in with the column such as the column IS. The joist forms 5| and 5 for the beams 53 and 55 are matched in with the spandrel beam forms 56, Figure 10, for the spandrel beams 51 and 48, Figure 6, by appropriate blocking and pressed board'to thus complete the entire floor and column assembly ready for pouring. Reinforcing bars may now be laid in proper position in the forms thus set up and the concrete poured in the usual manner.

After the concrete has been poured and cured, the lift truck may now be brought into position shown in Figure 2 and its I beams 28 and 29 raised to again pick up the load of the trusses 3i) and 3|. The column forms are then knocked down and the entire floor form assembly suitably vibrated to loosen the pans and other parts from the poured concrete floor. The lift truck then lowers the entire assembly down out of the way. In this position, it may now be transported bodily to a new panel position, such as B, C, D, and so forth, and again raised and mounted on the column forms in proper position for pouring a new panel portion of the floor, or the entire form is lowered by the lift truck into convenient standing position for the workmen where it may be quickly dismantled and taken down for removal to another location.

Thus there is provided a method of erecting and a system of concrete floor forms which may readily be assembled at a convenient working height level for workmen upon a lift truck which is utilized to raise and lower the completely assembled floor form and to position it in upward position where it may be quickly mounted in pouring position on the column forms, thus elimi hating the use of additional scaffolding materials and otherwise greatly increasing the efficiency, safety, and speed of assembling and disassembling and moving the floor form.

While the apparatus herein disclosed and described constitutes a preferred form of the invention, it is to be understood that the apparatus is capable of mechanical alteration without departing from the spirit of the invention and that such mechanical arrangements and commercial adaptations as fall within the scope of the appendant claims are intended to be included herein. Having thus fully set forth and described thisinvention, what is claimed as new and desired to be secured by United States Letters Patent is:

1. The method of erecting a reinforced concrete building form comprising the steps of: (a) positioning a lift truck under a floor panel to be poured; (b) assembling the floor panel forms on said lift truck while in lowered position; (0) raising said lift truck with the assembled floor forms to proper ceiling height; (d) setting up the column forms associated with said panel; (e) lowering said lift truck to bring said floor form to rest on the top of said column forms in proper position for pouring the floor and columns of said building; and (f) supporting said floor form substantially entirely by said column forms.

2. The method of erecting a reinforced concrete building form comprising the steps of: (a) positioning a lift truck under the floor panel to be poured; (b) assembling the floor panel forms on said lift truck while in lowered position; (0) raising said lift truck with the assembled floor forms to proper ceiling height; ((1) setting up the column forms associated with said panel; (e) lowering said lift truck to bring said floor form to rest on the top of said column forms in proper position for pouring the floor and columns of said building; (I) supporting said floor form substantially entirely by said column forms; and (g) removing said column forms and lowering said floor form by said lift truck for the final curing of said poured concrete floor and columns.

3. In a method of erection and system of concrete floor forms utilizing column forms for supporting all form work, the steps of: (a) positioning lift truck devices in proper relative position to a floor panel to be formed; (b) assembling floor forms on said lift truck while in lowered position so that the workmen may assemble said forms while in standing position on the floor below the floor to be poured; (0) operating said lift truck to raise said assembled floor forms to and slightly above pouring position; (11) as-' sembling the column forms of the columns associated with said floor panel to be poured; (e) lowering said lift truck to allow said assembled floor forms to rest in pouringposition upon said column forms; (I) supporting said assembled floor forms substantially entirely by said column forms; and (g) removing said lift truck to another panel for repeating said process of further assembling other floor and column forms for said reinforced concrete building.

4. Method of erecting a concrete floor form comprising the steps of: (a) positioning a lift truck in proper relative position below the floor panel to be poured;. (b) mounting I beams on the lift forks of said lift truck; (0) placing trusses on said I beams and connecting said trusses together with open web adjustable joists extending parallel to said I beams; (d) attaching metal soflits to the upper edges of said joists; (e)assembling removable metal pans between said sofflts; (1) raising said entireassembly from a lowered position to pouring position by operating lifting mechanism of saidlift truck; (a) positioning and holding said floor form assembly in pouring position by connecting said forms to the column forms associated with said form panel; and (h) supporting said floor form assembly substantially entirely by said column forms.

5. In a method for constructing and erecting of concrete floor forms, the steps of: (a) providing a lift truck having a form carrying and elevating device; (b) assembling a series of soflits and metal pans on said device when in lowered position by workmen standing on the floor below the floor panel to be poured; (0) operating said lift truck to raise said floor form assembly to pouring position; (d) erecting the column forms associated with said panel so as to support said floor form in pouring position; (e) lowering said device of said lift truck to release said lift truck from supporting said fioor form; and (f) supporting said floor form substantially entirely by said column forms.

6. In a method for constructing and erecting of concrete floor forms, the steps of (a) providing a lift truck having a work carrying and elevating device; (b) assembling a series of sofiits and metal pans on said device when in lowered position by workmen standing on the floor below the floor panel to be poured; (0) operating said lift truck to raise said floor form assembly to pouring position; (d) erecting'the column forms associated with said panel so as to support said floor form in pouring position; (e) lowering said device of said lift truck to release said lift truck from supporting said floor form; (,f) supporting said floor form substantially entirely by said column forms; (a) removing said floor form after the pouring and setting of the concrete floor by again raising said lift truck device to engage said floor form and carry the load thereof; (h) removing said column forms; (2') shaking said floor form loose from said poured floor; and (7') lowering said lift truck device to return said floor form to lowered position for dissembly or movement to another location.

7. In the erection of a concrete building form including vertical columns and floor forms, the method comprising the steps of raising the floor forms to a slight distance above the predetermined height of the floor, then erecting the forms for the column, and then lowering the forms for the floor onto the column forms and supporting said fioor forms substantiall entirely by said column forms.

8. In the erection of a reinforced concrete building form, the method comprising the steps of: (a) raising a floor form to a small distance above the height for said floor, (b) temporarily supporting said form in this upraised position and at the same time erecting forms for columns, (0) and then lowering said floor form onto said column forms and supporting said floor form substantially entirely by said column forms.

ALBERT G. OVERESCH.

REFERENCES CITED Brynoldt Aug. 24, 1926 Kohlhaas -r s- June 12, 1945 Number

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