US2989794A - Shuttering system for cast concrete walls - Google Patents

Description

Ju 1961 F. BITTNER 2,989,794

SHUTTERING SYSTEM FOR CAST CONCRETE WALLS Filed June 20, 1956 2 Sheets-Sheet 1 ,1-75 FIG. 2 F/6.- 3

IL L 1 INVEN TOR.

flea/V2 5/77/1/51? June 27, 1961 F. BITTNER SHUTTERING SYSTEM FOR CAST CONCRETE WALLS Filed June 20, 1956 2 Sheets-Sheet 2 1 :iiii:

United States Patent 2,989,794 SHUTTERING SYSTEM FOR CAST CONCRETE WALLS Franz Bittner, Salzburg, Austria Filed June 20, 1956, Ser. No. 592,579 Claims. (Cl. 25-131) The present invention relates to the construction of concrete walls of all types.

It is the principal object of this invention to provide an improved, simple, highly economical shuttering system for the building of all types of multi-story concrete walls.

Recently, a very simple and advantageous concrete shuttering assembly has been developed, wherein the shuttering supports lie within the core of the wall and may be recovered therefrom.

In accordance with the invention, this type of concrete shuttering has been so improved that it may be used not only for small buildings but also in the construction of skyscrapers.

According to an essential feature of the invention, the shuttering supports overlap in the plane of the building ceilings so that the outer shuttering support of the next higher floor may be supported by the inner shuttering support of the next lower floor during a predetermined portion of the concrete hardening period. This improves the rigidity and the accuracy to size of the concrete shuttering.

The various objects, features and advantages of the invention will be more fully understood in connection with the following detailed description of certain pre ferred embodiments thereof, taken in conjunction with the drawing wherein FIG. 1 shows a vertical section of a multi-story wall erected with the aid of the shuttering supports according to the present invention;

FIG. 2 is a perspective view of a spacer;

FIG. 3 is a perspective view of a wire loop for mounting the shuttering panels on the supports;

FIG. 4'is a vertical section showing a portion of the is assembled by mounting spacers 5 in horizontally aligned apertures in rods 1 and 2'. As shown, lowermost aperture 3' in the outer rod may be an elongated slot to permit adjustment of the positioning of the rod. The ladder-like support 1, 2, 5' is now ready for mount! ing of the shuttering (as illustrated in FIGS. 4-7). After the second story wall is cast, the procedure is repeated by removing outer support rod 1' and anchoring next higher support rod 1" to the completed lower wall section.

When, after removal of the inner shuttering and dismantling of the inner vertical rod, all the spacers, except the two uppermost ones, are taken out of the wall. The latter spacers must temporarily remain in the wall to retain the outer rod 1, being held in place by wedging on the inner wall surface, for instance. This may be accomplished by means of a rod piece of the same profile as the inner rod or by means of a wedge which is placed into the aperture of the spacer and contacts the wall.

FIG. 2 shows a preferred embodiment of a spacer. As shown in the drawing, spacer 5 has a transversely tapering center portion of arcuate cross section with two lugs 6 having slots 7.

FIG. 3 shows a shuttering panel retaining wire loop member 29 bent to form an inner portion 27 adapted to engage a support rod 1 or 2 (see FIGS. 4 and 5) and two parallel lateral portions 26. The outer ends of the lateral wire portions are twisted to form triangular elements 33 and 35. A transverse connecting element constituted by steel plate 31 with reinforcing crimp 34 is hinged to triangular element 35 at 36. The other end of the steel connecting element has a bent-over latch 32 shuttering, including the panels mounted on the form I support by means of a wire loop wedge connection;

'FIG. 5 is a section along line VV of FIG. 4;

, .FIG. 6 is aside view, partly in section, of the base hook provided at the bottom of the support for mounting the shuttering panels;

FIG..7 is a section alongline VII--VII of FIG. 6; and

FIG. 8 schematically shows the erection of a threestory concrete wall with the aid of the shuttering assembly of the present invention. i

Referring now more particularly to the drawing, FIG. lgillustrates how the shutten'ngsupports leapfrog from fioor to floor. As shown, the outer support rod 1 of the shuttering support extends beyond the height of the first story while the inner support has the same length as the height of the story. The support rods have a plurality of superposed horizontally aligned apertures 3, 4 and each pair of rods is assembled with spacers like a ladder. After the concrete wall A and the ceiling B have been cast and have set, the outer form panels of the lowest floor are dismantled, the outer rod 1 is removed from the wall and, as shown at 1, is mounted with its lowermost aperture 3 in alignment with the uppermost spacer remaining temporarily in wall A to form the outer support rod for the shuttering in the next highest floor. If desired, the base hook 8 may be connected with the next adjacent spacer, in which case the same also temporarily remains in the wall. After the outer support rod has been anchored to the uppermost spacer or spacers in wall A, the two uppermost spacers being more closely spaced than the remaining spacers, as shown, the inner support rod 2 for the next higher story is erected and the shuttering support adapted to engage the opposite triangular element 33-.

FIGS. 4 and 5 show the complete shuttering assembly including vertical support rods 1 and 2 connected by spacers 5. The spacers are shown rigidly but removably mounted with their lugs 6 in horizontally aligned apertures 3, 4 of the vertical rods, iron wedges 34 being forced into lug slots 7 to hold the structure in place. As more clearly shown in FIG. 5, the vertical rods are channel-shaped and spacer lugs 6 extend into the longitudinal recesses in the channel-shaped support rods which are temporarily embedded in wall A.

The wall shuttering is constituted by adjacently mounted panels 11 between which the concrete is cast. Each panel has longitudinally extending frames 9 and transverse ribs 10. Loop wire members 29 are mounted between adjacent panels (see FIG. 4) with their inner portion 27 engaging the support rods and their lateral portions 26 extending outwardly of panels 11. The latch 32 is then connected to element 33 to close the loop and a wedge 37 is forced between the closed loops and the frames 9 of adjacent panels to secure the panels to the outsides of the support rods and to hold the shuttering securely against outward displacement.

As shown in FIGS. .6 and 7, the lowermost panels are secured to the support rods by means of a base hook 8. The ends of the support rods have a cross plate 40 extending across their recesses, plates 40 being welded to the rods. Base hooks 8 have a vertically extending leg 12 which is adapted to engage plate 40 and thus to hold the base hook on the rod. A wedge 42 is forced between the frame 9 and the outer end of the hook to hold the panels 8 in position.

FIG. 8 schematically illustrates the leap-frog method of erecting a multi-story concrete wall with the shuttering of the present invention. Reading from left to right, phase 1 shows the shuttering erected for floor 1, the outer shuttering A including a vertical support rod anchored to the building base and extending into the next story while the inner shuttering J has the same length as the height of floor I. The concrete shuttering panels Ice Patented June 27, 1961,

3 are shown mounted on the outside of the support rods, as illustrated in detail in FIGS. 4 and 5.

Phase 2 shows the wall section of the first floor cast in the shuttering and the ceiling between the first and second floors finished. After the walling and ceiling of the first floor is thus completed, outer shuttering A is shown in phase 3 to be removed from fioor I and lifted to floor II, its lower end being anchored to the uppermost spacer remaining in the wall of floor I. An inner shuttering J is now put in place to complete the shuttering assembly for the second story. The second story wall and ceiling are now poured, as shown in phase 4, the inner shuttering I is removed from floor I and, as shown in phase 5, erected on floor III, shuttering A having been dismantled from the second story wall and erected thereabove in the manner shown and previously described in connection with the lower story. Phase 6 shows the concrete poured for floor III.

While the invention has been described by way of example in connection with certain now preferred embodiments thereof, it will be clearly understood that many variations and modifications may occur to the skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

What is claimed is:

1. A shuttering assembly for the construction of a concrete multi-story building wall, comprising a first concrete wall section of one story height, said wall section having an inside face, an outside face and an upper end, at least one row of transverse spacers having slotted ends mounted in said wall section near its upper end, said transverse spacers extending with one slotted end beyond the outside wall face, slidably removable wedge means for anchoring the other slotted end of the spacers to the inside wall face, a plurality of pairs of aligned vertical supports arranged atop said wall section, each of said pairs consisting of an inner support extending substantially the height of the next story and an outer support extending down to a respective one of said transverse spacers, slidably removable wedges for securing the extending slotted ends of the transverse spacers to the outer supports, said supports having a plurality of superposed apertures, the apertures of each pair of supports being horizontally aligned, a plurality of superposed transverse spacers having slotted ends mounted in horizontally aligned ones of said apertures in each pair of vertical supports, slidably removable wedges in said slotted ends of the last-named spacers for securing the last-named spacers to respective ones of said vertical supports, a plurality of adjacently positioned panels mounted on the outsides of and supported solely by the vertical supports to form a vertical shuttering internally supported by the supports, and removable wedge means for securing the panels to the supports against outward displacement.

2. The shuttering assembly of claim 1, wherein said removable means for securing the panels to the supports comprises a plurality of loop members each having an inner portion engaging the supports, two substantially parallel lateral portions integral with and extending outwardly from said inner portion and a transverse connecting element permanently attached to the outer end of one of the lateral portions and removably secured to the outer end of the other one of the lateral portions to form a closed loop, each loop member being mounted with its lateral portions vertically adjacent one of said panels, the transverse connecting elements of the loop members being outwardly spaced from the panels, and wedge elements slidably secured between the panels and the transverse connecting elements.

3. The shuttering assembly of claim 1, further comprising a base hook having an inner end removably attached to the lower end of each one of said supports and a hooked end extending outwardly of said supports and beyond said panels, and a wedge element slidably secured between the panels and said hooked ends.

4. The shuttering assembly of claim 1, wherein the apertures near the lower ends of said outer support rods are vertically extending slots for vertically adjustable attachment to the transverse spacers in said first wall section.

5. The shuttering assembly of claim 1, wherein the spacing between the two uppermost spacers is smaller than the spacing between the other spacers.

References Cited in the file of this patent UNITED STATES PATENTS 676,785 Toelpe June 18, 1901 1,036,468 Dyhrkopp Aug. 20, 1912 1,038,986 Stretch Sept. 17, 1912 1,101,592 Wagner June 30, 1914 1,114,946 Venable Oct. 27, 1914 1,574,636 Suiter Feb. 23, 1926 1,588,229 Hotchkiss June 8, 1926 1,619,144 McMillan Mar. 1, 1927 1,658,681 Jordan et al Feb. 7, 1928 1,697,354 Gober et a1 Jan. 1, 1929 1,780,661 Wedberg Nov. 4, 1930 1,823,195 Gremel Sept. 15, 1931 1,935,218 Umbach Nov. 14, 1933 2,019,195 Simpson Oct. 29, 1935 2,118,374 Doyle May 24, 1938 2,127,973 Isett Aug. 23, 1938 2,312,983 Summers Mar. 2, 1943 2,329,550 Mentesana et a1 Sept. 14, 1943 2,352,783 Geer July 4, 1944 2,442,292 Hart May 25, 1948 2,493,264 Records Jan. 3, 1950 2,574,274 McMullan Nov. 6, 1951 2,657,449 Hillberg Nov. 3, 1953 2,669,000 Seemann Feb. 16, 1954 2,806,277 Hand et a1 Sept. 17, 1957 2,873,505 Sheldon Feb. 17, 1959

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