Device for suspending forms from structural beams

Nov. 22, 1966

J. H. JACKSON

3,286,972

DEVICE FOR SUSPENDING FORMS FROM STRUCTURAL BEAMS

Filed June 19, 1964

Sheets-Sheet 1

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Nov. 22, 1966

J. H. JACKSON

3,286,972

DEVICE FOR SUSPENDING FORMS FROM STRUCTURAL BEAMS

Filed June 19, 1964

Sheets-Sheet 2

Fig. 2

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James H. Jackson

INVENTOR.

BY • Attomys

Nov. 22, 1966 j. h. jackson 3,286,972

DEVICE FOR SUSPENDING FORMS FROM STRUCTURAL BEAMS

Filed June 19, 1964 4 Sheets-Sheet 3

Fig. 3

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Fig. 5

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James H Jackson

INVENTOR.

* (7 Attorneys

Nov. 22, 1966

J. H. JACKSON

3,286,972

DEVICE FOR SUSPENDING FORMS FROM STRUCTURAL BEAMS

Filed June 19, 1964

Sheets-Sheet 4

<img file="US3286972A_D0007.tif" />

United States Patent Office Patented Nov. 22, 1966

FIGURE 1 is a view illustrating the device of the instant invention mounted on a pair of structural I-beams;

FIGURE 2 is an enlarged cross-sectional view taken substantially on a plane passing along line 2—2 at FIGURE 1;

FIGURE 3 is a cross-sectional view taken substantially on a plane passing along line 3—3 of FIGURE 1;

FIGURE 4 is an exploded perspective view of various ones of the components which go into making up the device of the instant invention;

FIGURE 5 is a transverse cross-sectional view taken through the tubular mounting member just above the tie rod extending therethrough;

FIGURE 6 is a partial perspective view of the outer end of the cantilevered bracket; and

FIGURE 7 is a perspective view of the grade board suspension utilized in positioning the grade boards relative to the form joists.

Referring now more specifically to the drawings, it will be noted that the device of the instant invention is particularly adapted for use in conjunction with structural I-beams 10 which include vertical webs 12 and laterally projecting horizontal upper and lower flanges 14 and 16.

Basically, the device includes hangers 18, in the form of elongated bars, supported on and extending transversely across the upper flanges 14 of the beams 10, these hangers 18 having a vertically elongated mounting member depending from each end thereof, each mounting member having, rigidly mounted thereon, a plurality of form supporting saddles 20 carrying form beams 22, thereby effecting a supporting or suspension of the forms from the I-beams 10.

uaouanj ™ _____- _______...______ The vertically elongated mounting members are of two haneer^trapiT whiclT'are supported' transversely across 35 types, one type designated by reference numeral 24,

3,286,972

DEVICE FOR SUSPENDING FORMS FROM STRUCTURAL BEAMS

James H. Jackson, 3408 Billups Road, West Chesapeake, Va.

Filed June 19,1964, Ser. No. 376,465

Claims. (Cl. 249—24)

The present invention generally relates to construction equipment, and is more particularly concerned with scaffolding for suspending forms from structural beams of the type having vertical webs and laterally extending horizontal upper flanges, such as for example, I-beams.

One of the primary objects of the instant invention is to provide scaffolding for suspending forms both between the structural beams and centilevered laterally outward from the endmost beam in a manner so as to enable the pouring of a continuous concrete deck having a substantial cantilevered overhang relative to the supporting structural beams.

Another significant object of the instant invention is to provide a suspension device which enables a utilization of the scaffold bracket shown in applicant’s Patent No. 3,044,573 in the formation of the overhanging portion of the poured deck.

Furthermore, it is a significant object of the instant invention to incorporate various adjustable features so as to insure a proper, rapid and convenient levelling of the deck forms.

Also, it is a significant object of the instant invention to provide a form suspending device which, both itself can be easily stripped and which also allows a simple stripping of the form boards.

Basically, the device of the instant invention includes being utilized along the outer face of the outermost beam 10 and being particularly adapted for the support of a cantilevered scaffold bracket 26 similar to the bracket shown in Patent No. 3,044,573, this bracket 26 and 40 mounting chamber 24 being utilized in the formation of a cantilevered or overhung portion of a poured concrete deck 28. The other type of vertically elongated mounting member designated by reference numeral 30, depends from the corresponding hanger 18 along the inner faces 45 of the beams 10 and, in conjunction with a similar mounting member 30 on an adjacent beam 10, supports the intermediate form boards at the opposite ends thereof.

Each hanger 18 consists of an elongated flat bar of a length so as to project laterally beyond both edges of the ⁵³ upper flange 14 of the corresponding beam 10. As will be appreciated from FIGURE 1, the hanger 18 is supported slightly above the upper surface of the corresponding top flange 14 by a pair of rod-like feet or spacers 32 which allow for a flowing of the poured concrete between the hanger 18 and flange 14 so as to effect a complete embedding of the hanger 18. Each end of each of the hangers 18 is provided with a vertical hole therethrough and a nut 34 welded to the upper surface thereof in surrounding relationship to the hole. Extending vertically through, and adjustably threaded within the nuts 34, are suspension bolts 36, each having the lower end thereof supporting one of the vertically elongated mounting members, either 24 or 30.

Referring first to the mounting member 24, it will be noted that this member is in the form of an elongated rectangular tube 38 having an open lower end 40 and an upper end closed by a plate 42 welded therein. Welded to the upper surface of the plate 42 is an angle member 44 which, in the installed position of the member 24 as illustrated in FIGURE 1, projects laterally from the tube 38 toward the structural beam web 12 and terminates, at the structural beams and which have, suspended from opposite ends thereof, vertically elongated mounting members. These mounting members are of two types, the first type having mounted thereon an outwardly cantilevered bracket which in turn has vertically adjustable form supports thereon so as to form the supporting structure for forms used in the pouring of an overhang or cantilevered portion of a deck. The other type of vertically elongated mounting member is utilized between the structural beams for the support of one end of form structure which is extended between the beams, this member also including means for vertically adjusting the form boards by raising or lowering the respective ends thereof. Likewise, the instant invention also contemplates the provision of a specific suspension for properly orientating the grade boards relative to the form joists which will extend between the structural beams, this suspension eliminating both the time and material waste normally encountered when utilizing conventional methods in fixing grade boards in vertically adjusted positions relative to the form joists.

A still further object of the instant invention is to provide a suspension means for forms which, in addition to being completely adjustable, is relatively simple in construction, easy to both install and remove, does not damage the actual form lumber thus allowing the lumber to be re-used on subsequent set-ups, and can be dismantled and compacted for shipment or storage, while at the same time providing, in its erected position, a highly stable and safe construction.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the ac- γθ companying drawings forming a part thereof, wherein like numerals refer to like parts throughout, and in which:

3,286,972 its inner edge, in an upstanding leg 46 which is to be engaged against the undersurface of the upper flange 14. Welded to the horizontal portion of the angle member 44 is a downwardly opening channel section 48. The plate 42, horizontal portion of the angle member 44, and web portion of the channel section 48 are provided with vertically aligned apertures therethrough for the reception of the suspending bolt 36, this bolt 36 being provided with a suitable head or enlargement 50 on the lower end thereof, this enlargement 50 engaging against the undersurface of the plate 42 and thereby suspending the tube 38 on the bolt 36. It will be appreciated from FIGURE 4, that one side face of the tube 38 is provided with an opening or cut-out portion 52 so as to allow convenient access to the threaded bolt 36 for either a removal of the bolt 36 or a vertical adjustment of the mounting member 24 through the bolt 36. For this purpose, the bolt head 50 will of course be provided with a tool receiving configuration. It is through this bolt that the clamping of the beam flange 14 between the hanger 18 and the rigid vertical leg 46 is effected, this leg 46 spacing the upper end of the tube 38 from the flange 14 so as to allow for the reception of the deck forming boards 54 under the Upper, flange 14. The inverted channels 48, welded to the upper end of the tube 38, are of particular significance in stabilizing the mounting member 24 and avoiding , any tendency for the upper end thereof to creep outwardly under a heavy load applied to the outermost end of the bracket 26.

Extending transversely through and outwardly beyond the tube 38 is an elongated tie rod 56, this tie rod 56 being located between the upper and lower ends of the tube 38 which in turn is reinforced by a first fiat plate 58 welded to both the tube 38 and the head of the rod 56, and a second plate 60 welded to the opposite side of the tube 38 immediately below the rod 56.

Adjacent the lower end thereof, the tube 38 is provided with a bracket stabilizing U-shaped member 62 which has the bight portion thereof welded to the tube 38 with the two legs thereof projecting parallel to and in the same direction as the projecting end of the rod 56.

Turning now specifically to ithe scaffold bracket 26, it will be appreciated that this bracket closely resembles the bracket of Patent No. 3,044,573 in that it includes rigidly interconnected horizontal, vertical and diagonal angle members 64, 66 and 68, along with an eccentric lock 70 which is rotated, through a handle 72, so as to clamp a tie rod, in this case rod 56, against a horizontal plate 74 located immediately therebelow, and thereby suspending the bracket 26 on the rod 56. The joint between the lower ends of the vertical and diagonal angle members 66 and 68 is enclosed within an angle 76 which has the vertical leg 78 thereof abutting against the tube 38 below the stabilizing legs of the U-shaped member 62, the vertical angle member 66 being received between the legs, thus restricting the lower end of the bracket 26 against lateral movement, the weight of the superimposed load retaining the angle member 66 between these legs. The joint between the upper end of the angle member 66 and the inner end of the angle member 64 is also enclosed within θθ an angle 80, this angle 80 being transversely elongated and including a horizontal flange 82 overlying the horizontal member 64 and a vertical flange 84 abutting the tube 38 directly above the tie rod 56.

Four form supporting saddles 20 are supported by the ⁶⁵scaffold bracket 26, two at the inner end thereof and tvyo at the outer end thereof. The two saddles 20 at the inner end of the bracket 26 are adjustably supported thereabove by depending threaded rods 86 rotatably received through a pair of vertically aligned apertures in a transversely extending tubular base 88, each threaded rod 86 being vertically adjustable by a nut 90 threaded thereon and bearing against the upper surface of the tubular base 88. The base 88 is supported, through two rod-like spac- 75 ing legs 92, on the upper flange 82 of the angle 80 as best seen in FIGURE 3. Projecting outwardly from the base 88 is a vertical flange 94 which in turn includes a laterally extending apertured portion 96 through which 5 the bolt 98 extends so as to secure the base member 88 to the horizontal angle member 64.

The outer two saddles 20 are also supported for vertical adjustment by threaded rods 86 extending through the outer end portions of a transversely extending tubular 10 base 100, nuts 90 likewise being utilized for achieving the vertical adjustment of these outer saddles 20. The base 100 differs from the base 88 in that it is provided with, noting FIGURE 6, an angle member having the horizontal leg 102 thereof welded to the undersurface 15 of the base 100 and the vertical leg 104 thereof interposed within the joint between the horizontal angle member 64 and the diagonal angle member 68.

The form beams 22 extend transversely of the saddles 20 and are supported therein, these beams 22 receiving 20 outwardly projecting form joists 106 which in turn support the cantilevered portions 108 of the deck forms and any external working platform 110 which might be needed. The joists 106 and portions 108 having their inner ends engaged under the upper I-beam flange 14. 25 Incidentally, while not specifically mentioned supra, it will be appreciated from the drawings that the mounting member 24 is of a length so as to position the lower portion thereof in bearing engagement against the lower beam flange 16, thus resisting any force or load applied 30 on the cantilevered bracket 26. Further, the open lower end of the tube 38 provides a convenient means for mounting a wooden stripping bracket, generally indicated in phantom lines and referred to by reference numeral 112, this stripping bracket, or at least the vertical post 35 therefor being slipped within the lower end of the tube 38 and nailed through the holes 114. A link chain 116 having one end thereof welded to the tube 38 for use in mounting the stripping bracket 112 is also provided, the opposite end of the chain 116 being releasably re⁴⁰ ceived within the hook forming plate 118.

The second type of vertically elongated mounting member, generally indicated by reference numeral 30, is utilized for the adjustable supporting of one end of the form work which extends between adjoining structural 45 beams 10, the opposite end of the form work of course being similarly supported, as best seen in FIGURE 1. This mounting member 30 consists of a vertically elongated channel member 118 having a flat plate 120 welded to the upper end thereof and receiving a threaded rod 122 50 therethrough, this rod 122 having a tool receiving head 124 thereon engaged against the inner face of the plate 120 and supporting the channel member 118 for vertical adjustment .upon a rotation of the bolt 122 which is threaded within the nut 34 welded to the hanger 18.

Also welded to the upper end of the channel member 118, and projecting laterally therefrom inwardly toward the web 12 of the beam 10, is the angle member 126, the vertical leg 128 of which is brought into clamping engagement with the lower surface of the horizontal beam flange 14 by an adjustment of the bolt 122.

Welded to the lower end of the channel member 118, along the two sides thereof, are a pair of extensions or extending portions 130, each of these portions 130 having, on the outer end thereof, adjustable extensions ; formed of rods 132 adjustably threaded therein for selective longitudinal extension and retraction, these rods 132 having enlarged bearing heads 134 on the outer ends thereof for abutting engagement with the beam web 12 so as to effect a plumbing of the mounting member 30 with the lower end thereof in substantial vertical alignment with the upper end which in turn is clamped to the upper flange 14.

Welded to the channel member 118 and extending transversely thereacross on the inwardly facing side thereof, that is the side directed toward the adjacent

3,286,972 types, a first type which mounts a scaffold bracket for the formation of the overhanging portion of the deck, and a second type incorporating a saddle rigid therewith for supporting one end of the portion of the form work 5 which extends between adjacent structural beams. In addition, the instant invention includes, in order to provide for the final levelling of the deck forms, a grade board suspensions which are adjustable, and thereby cooperate with the adjustable saddles so as to achieve the exact ele1Q vation desired for the deck forms.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to 15 the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.