US2929602A - Scaffold - Google Patents

Description

R. w. HYRE 2,929,602

SCAFFOLD 3 Sheets-Sheet 1 March 22, 1960 Filed Nov. 28. 195s INVENTOR ROBERT WARREN HYRE a/mmfdda/aa'm ATTORNEY xviii.) s. I

R. W. HYRE SCAFFOLD March 22, 1960 3 Sheets-Sheet 2 Filed Nov. 28, 1956 INVENTOR ROBERT WARREN HYRE fa/mani ATT RNEY m D: j

March 22, 1960 R. w. HYRE 2,929,602

scAFFoLD Filed Nov. 28. 1956 s sheets-sheet :s

FIG. 4

FIG. 5

INVENToR ROBERT WARREN HYRE 8a/mani ATroRNEY r p 2,929,602 -l Patented Mar. 22, 1960 SCAFFOLD Robert W. Hyre, Chattanooga, Tenn.

Y g VApplication November 28, 1956, Serial No. 624,806

4 claims. (c1. 248-354) This'invention relates to scaffolds and more particularly to a scaffold which is adapted for many types of use.

One object of this invention is tov provide a scaffold having multiple adjustments for elevation to various heights.

Another object of this invention is to provide like scaffold end frames which may be stacked one upon another to various heights without the use of an'ginternal coupling pin.

Another object of this invention is to provide .a light portable scaffold of exceptional strength, and with a minimum of substructure.

Another object of this invention is to provide a scaold which will maintain a platform in horizontal position regardless ofthe unevenness of the surface which sup- Y ports the scaffold.

A further object of this invention is -to provide scalfolds which may be assembled in such a manner as to adequately and completely support the concrete forms for a monolithic slab and beams.

Another object of this invention is to .provide a scaffold assembly which is adapted to support concrete form work which overhangs the scaffold supports.

Another .object of this invention is to provide a scaffold which may be adapted for the low elevation work of brick masons as well as the high and overhead work `of carpenters, painters and plasterers.

Another object of this invention is to provide a scaffold beneath which thereis ample room for the Vpassage lof persons and vehicles.

.A further object of this invention is to provide a scaf- .fold frame having attachments which will permit the .support of platforms and structural members at varying elevations.

A further object of this invention is to provide a scaffold constructed of tubular frame work having novel .means for stabilizing structural members having at surfaces supported by the tubular portions of the scaffold. Another object of this invention is to provide a scaf fold having vertically telescoping support columns.

A further object of this invention is to provide means .for stabilizing the telescoping extensions `within telescop- .ing scaffold support columns.

Further objects and advantages of the invention will be apparent from the following descriptiontaken in conjunction with the drawings, wherein:

, Fig. 1 is a front elevation of the invention;

Fig. 2 is a front elevation of the invention supporting :a'monolithic concrete slab and overhanging beam;

Fig. 3 is a section taken along the lines 3 3 of Fig. l; Fig; 4 is a verticalsection taken along the lines 4-4 of Fig. 1, with the beam in phantom;

v Fig. 5 is a side. elevation of the beam hanger of Fig. 4

Jin an alternate position;

Referring now to the drawings in more detail, a scafi fold end frame is constructed of truss 11, preferably of the open-web type having a horizontal upper tubular member 12 and a lower tubular member 13. A zig-zag rod 14 extends substantially the length of the truss 11 and alternately abuts the tubular members 12 and 13 at spaced intervals. Supporting each end of the truss 11 are vertical tubular columns 15. Additional truss members 16 depend from the end portions of truss 11 and are connected to columns 15, to not only lend added rigidity to the scaffold frame 10, but also to afford ample space to permit the passage of persons and vehicles beneath the truss 11. One or more horizontal bars 17 may be included in the truss members 16 for added rigidity, to provide ladders for access to the top of the scaffold, or to support platforms such as 18.

Each column 15 is provided with a set of vertically aligned, equally spaced apertures 19. In horizontal alignment with and diametrically opposed to the apertures 19, are a second set of apertures 20 (Fig. 5).

Adapted to telescope within either end of the columns 15 are tubular extensions 21, having av set of vertically aligned apertures 22 of the same spacing as and adapted to mate with the column apertures 19.` Diametrically i opposed to the extension apertures 22 are a second set of apertures, not shown, adapted to mate with column apertures 20. To vary the effective length of a column 15, an extension 21 may be telescoped within either or both ends of the column untilthe column apertures 19 and 20 mate with the extension apertures 22. The column and extension are then locked together by means of a pin 24 inserted into mating apertures.

As illustrated in Fig. 1, 4the extensions 21 may be telescoped within the bottom of the columns 15 to provide vertically adjustable footings for the scaffold frame 10. The frame may be elevated in increments equal to the spacing between the apertures 19. A preferred spacing of about fourinches has proved to be very satisfactory in actual practice. After the column 15 and extension 21 are locked together by pin '24,.they may be stabilized against lateral movement by a stabilizer thumb screw 25, as illustrated in Figs. 1 and 7.

When the top of the column 15 is employed as aload bearing support, the telescoping extension 21 maybe inserted into the top of the column 15 to provide a vertically adjustable head in the same manner as the extension is used for an adjustable footing.

Inserted in the outer ends of the extensions Z1 are leveling screws 26. Fixed to the free ends of the leveling screws are bearing members such as a footing 27 or a T-head 28. Threadedly engaged to the leveling screw 26 for rotation is a handle 29, which also bears against the end of the extension 21. By rotating the handle 29, very ne adjustments in the effective length of the column 15 may be obtained. For example, when the T-head 28 engaging a purlin 30 is elevated to Within two inchesof its desiredheight to support a joist 31 by means of the vertical adjustment of the telescoping extension 21, the handle 29 is rotated until the leveling screw 26 urges the T-head 28 and purlin 30 upward the necessary two inches. The same type of manipulation at the bottom of the columns provides for fine elevational adjustments of the scaffold frame 10. The tubular member 12 of the truss 11 may be maintained horizontal when the columns 15 are supported on an uneven surface by individual adjustment of the extensions 21 and leveling screws 26 foreach column 15.

As illustrated in the right-hand column 15 of Fig. 1, an extension 21 is used as a footing without a leveling screw 26.

As illustrated in Fig. 2, the scaffold end frames 10 may be vertically stacked by inserting the top of a column 15 3 of one end frame into a collar 32 fixed to the bottom of the column 15 of a second frame. The bottom of the collar is preferably chamfered to facilitate entry of the top of the lower Column.

illustrated in Figs. 1 and 3 is a bracket 33 wedged between the upper and lower tubular members 12 and 13 of the truss 11, for stabilizing a ledger or sill 34, supported by the upper tubular member 12. The vledger 34 acts as a bearing for `the joined ends of beams, joists or purlins 35, which extend transverse to and are supported by the end frames 10. The bracket 33 comprises a vertically disposed plate 36 provided with a notch 37 at the top thereof for engaging the upper tubular member 12 and a notch 38 in the lower portion of the plate for engaging the lower tubular member 13. Recesses 39 are provided in the notches 37 and 38 to fit the rod 14. Flanges 40 extend from the top of iand normal to the plate 36 to pro-` vide a platform tangent to the upper edge of the tubular member 12 for supporting the ledger 34. The flanges 40 may be provided with securing means such as nails 41, for attaching the bracket 33 to the ledger 34. The bracket 33 is so constructed that it may be easily inserted in the truss member 11 without danger of being displaced. The only securing means required are thernails 41 for attachment to the ledger 34. p

The versatility of the scaffold end frame 10 is increased by attachment of ya beam hanger 42 to any of the columns 15 ias illustrated in Figs. l, 2, 4, 5 and 6. Thebeam hanger 42 comprises a U-shaped bracket 43 for supporting the end of a beam 44. The hanger 42 is provided with a column clamp 45 having depending arms 46 adjustably attached to the bracket 43. The arms 46 contain apertures 47 adapted to mate with apertures 48 in the bracket 43. Column clamp 45 comprises a U-shaped member having in the web portion 49 an aperture 50 to mate with a pair of aligned column apertures 19 and 20. The flange portions 51 of the clamp 45 contain a pair of aligned apertures 52 for mating with the column apertures 19 and 20, and are provided with another pair of apertures 53 adapted to receive a bolt54 bounding the outside of the column 15 engaged'by the clamp 45.

When the beam hanger 42 is attached to a column 15, as indicated in Fig. 1, with one of the flanges y51 supportedby a horizontal structural member such as 17, the bolt 54 may be inserted through the apertures 53 outside the column 15. If the flange 51 is not supported by a horizontal structural member, as in Fig. 2, the bolt 54 is inserted through the web aperture 50 and column apertures 19 and 20.

When the beam hanger 42 is rotated through 90 or the column 15 is provided with aligned apertures at right angles to apertures 19 and 20, the bolt 54 is inserted through the flange apertures 52 and the column apertures, as indicated in Figs. and 6.

After the clamp 45 is secured to the column 15, the beamv 44 may be vertically adjusted by raising'or-low'- ering the bracket 43 relative to the arms 46 and inserting pins or bolts 55 in mating apertures 47 and 48. As illustrated in the lower beam hanger 42 of Fig. 2, finer adjustments may be provided by a screw 56 extending vertically through the bottom of the bracket 43 and bearing against the bottom vof the supported member, such as'strut 57.

One use of the beam hangers 42 is disclosedin Fig.

1, in which the beam 44 is supported at each end by a pair of beam hangers hung from adjacent columns 15 of two scaffold end frames spaced apart from each other. This beam 44, in turn, supports the forms for a concrete beam 58.

Another use of the beam hangers is disclosed in Fig.l

the beam hangers 42 may be hung 1at right angles to their; P

4 positions shown in Figs. l and 2 in the manner disclosed inFigS'Sand The sets of spaced apertures 19 and 20 provide means for attaching ia beam hanger l42 at various positions along the entire length of the column 15. The extension apertures 22 have the same spacing as the column apertures 19 and 20 so that when the extension 21 is locked in the column 15, all the column apertures will remain unobstructed to receive the beam hanger bolt 54.

Fig. 1 discloses a preferred means of containing the beam sides 61 during the setting of the concrete beam 58. A tie band 62 having apertures 63 spaced the length thereof is disposed transversely beneath the beam bottom 64. Wedges 65 are inserted in the apertures 63 on opposite sides of the beam 58 to hold kickers 66 against the beam sides 61, thus compressing both beam sides against the beam bottom.

Scaffolding fabricatedl according to this invention has v proved itsel-f adaptable to more varying situations, particularly in concrete form work, than other types of scaffold units. This scaffolding has combined into a compact unit many features heretofore found in independent and cumbersome scafoldunits.

from fractions of an inch to several hundred feet, by vision of leveling screws, telescoping extensions and the stacking of one scaffold end frame upon another.

The scaffoldend frames 10 are constructed to straddle sidewalks, Vpassageways, permanent obstacles, outdoors or indoors, such as walls, steps or church pews, without sacrifice of strength in the scaffold structure. The scaffold end frames canbe arranged with vtheir various attachments to completely support a monolithic concrete slab and beam structure, including beams running at right angles to each other, and beams which overhang the scaffold foundations.

The truss members 16 provided with horizontal bars 17 provide ladders to enable carpenters, painters or plasterers to ascend to a platform supported by the truss 11. The horizontal bars 17 may also support platforms 18 for the low elevation work of skilled laborers, such as brick masons, and vehicles containing brick or mortar may be transported to the site of construction beneath the truss 11 and between the truss members 16.

In addition to its many uses, the scaffold according to this invention is extremely strong, light, portable and occupies a minimum of space.

.It will be apparent to those skilled in the art that various changes may be made in the invention, without departing from the spirit and scope thereof, and therefore the invention is not limited by that which is shown in the drawings and described in specification, but only as indicated in the appended claims.

What is claimed is: Y

1. In scaffolding for supporting concrete slab and beam forms, the combination of: a scaffolding end-frame comprising an integral, inverted U-shaped structure made up of spaced, vertically disposed, tubular leg members, a horizontal load-supporting member extending therebetween at a level below but adjacent that of the upper ends of said leg members and means for trussing said leg members, upper and lower leg extensions telescopically related to upper and lower ends respectively of said leg members, said leg members and leg extensions being each provided with a plurality of cross-pin receiving holes spaced at predetermined equal distances from one vanother along their respective lengths, cross pins extending through selected registering holes Ain said tubular legs and leg extensions for securing same together in one'of a plurality of positions of coarse vertical adjustment as determined by the spacing of said holes, and screw means on the relatively outer ends of said leg extensions for effecting a fine adjustment Ain the vertical length of said leg members; and a beam-form hanger means extending in offset relation from at least one said This scaffolding is provided with vertical adjustments `justment of its elevation; the construction and arrangement being such as to insure exact vertical positioning, both individually and with respect to one another, of a beam form supported on said hanger means and a slab form supported on said end frame `through said leg members.

2. The combination substantially as set forth in claim 1, wherein said beam hanger means comprises a beamform supporting bracket, a clamp member adapted to be secured 'to its leg member by said cross-bolt means, and means for securing the supporting bracket to the clamp member in one of Va plurality of closely spaced vertical elevations with respect thereto.

3. The combination substantially as set forth in claim 1 wherein said beamV hanger means comprises a beamform supporting bracket, a clamp member adapted to be 'secured to its leg member by said cross-pin means, said clamp member including provision for securing itself to either the side or the front 'of said leg member.

4. The combination substantially as set forth in claim l, whererin said tubular leg members each carries means operable externally of but which extends into the bore thereof in position to engage with the portion of a leg extension telescoped in said bore, thereby to stabilize said leg member and leg extension against relative vertical motion.

References Cited in theile of this patent UNITED STATES PATENTS 786,054 Roy Mar. 28, 1905 1,003,407 Abrams Sept. 19, 1929 1,705,979 Kingston Mar. 19, 1929 1,874,005 Gooder Aug. 30, 1932 2,103,603 Voigt Dec. 28, 1937 2,125,830 Uecker et al Aug. 2, 1938 2,201,608 Causey ..-y May 21, 1940 2,293,489 Causey Aug. 18, 1942 2,316,952 Halferty Apr. 20, 1943 2,425,896 Page Aug. 19, 1947 2,445,453 Pennington July 20, 1948 2,605,074 Bucsko et al July 29, 1952 2,736,613 Iagiel Feb. 28, 1956 FOREIGN PATENTS 87,256 Norway Feb. 18, 1956

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