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Патент USA US2122276

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June 2s, 1938.
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G. B. Bosco
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2,122,276
FORM HANGER FOR CONCRETE 'SLAB‘I STRUCTURES
Filed Aug. 25, 1937
2 Sheets-Sheet
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June 28, 1938.
^ G. B. Boscol
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2,ì22,276
FORM HANGER FOR CONCRETE SLAB STRUCTURES
Filed Aug. 23, 1937
2-Sheets-Sheet 2
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2,122,276
Patented June 28, 1938
UNITED STATES
FFICE
_PATET
2,122,276
FORM HANGER FOR CONCRETE SLAB
STRUCTURES
George B. Bosco, Chicago, Ill.
Application August 23, 1937, Serial No. 160,464
9 Claims.
This invention relates to hangers for suspend
ing the temporary forms used in the construction
of concrete slabs such as decks, floors, ceilings,
and the like.
«
In such constructions, the concrete slab is
usually supported by a plurality of horizontal
permanent girders, beams, or joists which may be
I-beams or other structural steel shapes. The
temporary forms span the spaces between the
10 permanent beams and are suspended by hang
ing l which is supported on a plurality of joists,
beams, or girders 2, only one of which is shown
herein. These horizontal beams are usually ar
ranged in substantially parallel spaced relation,
and the spaces between the horizontal beams are . G
spanned by the temporary forms which are sus
pended from thev beams by the improved hang
ers.
yoke adapted for mounting on top of the beam
In the construction herein shown, the tempo
rary forms comprise the usual decking 3 sup
ported on horizontal joists 4 which are arranged
in substantially parallel spaced relation and
which are in turn supported by a plurality of
pairs of stringers 5. The stríngers of each pair
15 and having improved Suspenders coupled to the
through which the Suspenders of the improved
ers which embrace the beams.
The main objects of this invention are to pro
vide a hanger for slab forms having an improved
yoke and adapted to support the temporary
forms; to provide improved supporting and spac
ing chairs for supporting the yoke and for spac
ing it from the top of the beam; to provide im
20 proved means for coupling the Suspenders to
the yoke so as to permit the Suspenders to be
removed from the embedded yoke after the con
crete has set whereby the Suspenders may be
used over and over again; and to provide an im~
25 proved hanger of this kind which is sturdy and
which may be quickly and accurately assembled
and applied even by unskilled labor.
Illustrative embodiments of this invention are
are spaced apart so as to provide openings 6 » 15
hangers extend.
Y
`
In the construction shown in Figure 1, each of
the improved hangers comprises a supporting
yoke l’ supported on top of the beam and cou- ‘u
pled at its ends to a pair of depending sus
penders 8 which support the forms.~
In the constructions shown in Figures 1, 2, 3,
5 and 6, the yoke is not adjustable and com
prises a single bar which is preferably round in . 25
cross-section and may be of any desired gauge
which is sufficiently strong for the work in
volved. The yoke bar is substantially U-shaped
so as to provide depending arms 9 which- are
externally threaded. These yokes are left em -30
30 in:
Figure 1 is a vertical section of a building bedded in the concrete deck after the concrete
structure showing one of the improved hangers; ‘ has set and, therefore, it is necessary to provide
shown in the accompanying drawings, where
Figure 2 is a perspective of the yoke part of
the hanger shown in Figure 1;
Figure 3 is a sectional detail of a hanger and
35
building structure showing a modified form of
support and spacer for the yoke;
Figure 4 is an enlarged section of the yoke
and spacer, the view being taken on the line 4-4
40 of Figure 3;
Figure 5 is a perspective of the yoke and spac
ers shown in Figures 3 and 4;
Figure 6 is a horizontal section taken on the
line 6_6 of Figure 5;
45
Figure '7 is a view similar to Figure 1 but
showing an adjustable yoke for accommodating
beams of different widths;
Figure 8 is a perspective of the adjustable yoke
shown in Figure 7; and
50
Figure 9 is a perspective of one end of the ad
justable yoke shown in Figure 8 and its attached
supporting and spacing leg.
In the construction herein shown, the im
proved hangers are used in connection with the
55 construction of a concrete deck, iloor, or cei1-
supporting and spacing means for raising the
yokes above the lower surface of the deck.
In
the construction sho-wn in Figures 1 and 2, such l f
supporting and spacing means comprises a pair
of legs i0 which are preferably sheet metal
stampings bent to substantially V-shape and
being slightly longer than the depending arms
9 so as to raise the lower extremities of thc=I 40
arms 9 above the plane of the lower face of the
deck. As shown in Figure 2, the upper ends
of the'V-shaped legs il] are bent outwardly away
from each other so as to provide flanges II- and
I2.
The flanges H are apertured so as to provide « 45
openings I3 through which the ends 9 of the
yoke extend. The flanges I2 are permanently
secured to the yoke bar by spot welding as shown
at lll or by other suitable means.
.
In the construction shown in Figures 3, 4, 5 \
and 6, the supporting and spacing leg comprises
a sheet metal stamping l5 of substantially in
verted U-shape having strengthening ribs I6 in
the leg portions thereof and having a depression
Il in the cross portion thereof forming a seatr` 55
2
for the yoke bar.
2,122,276
The yoke bar may be Spot
bedded in the slab after the concrete has set, legs
welded to the legs I5 as shown at I8.
In the construction shown in Figures ‘7 and 8,
mounted on said yoke for supporting said yoke on
the yoke portion of the hanger is adjustable
widthwise so as to be adapted for use in connec
tion with structural shapes of different widths.
The adjustable yoke comprises a comparatively
long bar I9 and a relatively short bar 20, the
ends of which are bent to form arms 2| and 22,
10 respectively, which are externally threaded sim
ilar to the arms 9. Attached to the outer end
of the bar I8 is a supporting and spacing leg 23
which may be Similar in construction to the legs
I0 or, if desired, may be similar in construction
15 to the legs I5. The other leg of the adjustable
the beam and for spacing said yoke from the
bottom face of the slab, a, pair of depending Sus
penders threaded to the ends of Said yoke So as to
be adapted for removal of the Suspenders after
the concrete has set, and nuts on Said Suspenders
for Supporting the forms.
2. A hanger adapted to suspend temporary
forms from a beam in the construction of con
crete slabs comprising a yoke adapted to remain
embedded in the slab after the concrete has set,
10
yoke serves not only as a supporting and spacing
leg but also serves as a coupling for slidably con
said yoke being adjustable in width for straddling
beams of various widths, legs attached to and
depending from Said yoke for supporting said 15
yoke on and spaced above the beam, a pair of
Suspenders -detachably coupled to the ends of
necting the bars I9 and 20 together. As Shown
in Figures 7, 8 and 9, this coupling comprises a
said yoke so as to permit removal of Said sus
penders after the concrete has Set, and means
20 substantially V-Shape-d Sheet metal stamping 24
on said Suspenders for supporting the forms.
3. A hanger adapted to suspend temporary
having a pair of openings 25 formed therein for
slidably receiving the bar I9 and having a pair
of openings 25 formed therein for receiving the
short bar 2G. Struck out from the leg 24 adjacent
the openings 25, are lugs 2l which are Spot welded
or otherwise rigidly secured to the bar 20. With
this improved construction, the yoke may be ad
justed as to width by merely sliding the leg 24
on the bar I 9.
30
forms from a beam in the construction of con
crete slabs comprising a yoke adapted to remain
embedded in the slab after the concrete has set,
said yoke being extensible and retractable for
accommodating beams of various widths, legs
mounted on said yoke for supporting said yoke on
the beam and for spacing said yoke from the bot
tom face of the slab, a pair of depending sus
penders threaded to the ends of said yoke so as to
Each of the Suspenders 8 is preferably of Sub
stantially the Same construction as the tie ele
ment Shown in my Patent No. 2,061,751, issued
the concrete has set, and nuts on said Suspenders
November 24, 1936, and in my copending appli
cation, Serial No. 151,582, ñled July 2, 1937. It
for Supporting the forms.
4. A hanger adapted to suspend temporary
be adapted for removal of the Suspenders after
35 comprises a bolt having a tapered head 28 and a
forms from a beam in the construction of con
iiat shank 2S. The tapered head 28 extends
through an opening 3&1 in the decking 3 and has
an internally threaded socket 3| for engagement
with the threaded ends of the yoke. The shank
40 29 is of rectangular cross-section with threads
32 formed on only two of the opposed Sides there
of. With this type of construction, a wrench
may be easily applied to the ñat sides of the
shank without injury to the threads. Engaging
45 the threaded portions of the Shanks 29 are wing
crete slabs comprising a yoke of Substantially
nuts 33 having bearing portions 34 for engaging
the lower faces of the Stringers 5.
In operation, the Suspenders are coupled to
the yoke, and the yoke is then placed on top
50 of the beam with the Suspenders depending there
from. The entire weight of the forms iS carried
by the wing nuts 33, and these wing nuts may be
readily adjusted for bringing the upper surface
of the decking 3 to the required level which may
55 be either above, below, or in the plane of the
upper surface of the beam.
~In dismantling the forms after the concrete
has Set, the wing nuts 33 are removed so as to
permit dropping of the form parts, and the sus
60 penders 8 are then unscrewed from the thread
ed ends of the yokes. The holes left in the bo-t
tom face of the concrete after the removal of the
Suspenders 8 may be readily plugged with con
crete. The yokes remain permanently embedded
65 in the concrete.
Although but certain speciñc embodiments of
this invention have been herein Shown and
scribed, it will be understood that details of
constructions shown may be altered without
70 parting from the spirit of the invention .as
de
the
de
de
fined by the following claims:
inverted U-Shape having down-turned threaded
ends, legs for Supporting said yoke on the beam
and spacing said yoke from the bottom face of
the slab, a pair of depending Suspenders having 40
threaded engagement with the ends of said yoke
to permit removal of. the Suspenders after the
concrete has Set, and means on said Suspenders
for supporting the forms.
5. A hanger adapted to suspend temporary 45
forms from a beam in the construction of con
crete slabs comprising a yoke of substantially in
verted U-Shape having threaded ends, means for
Supporting Said yoke on the beam, said Support
ing means being longer than Said yoke ends so as
to position the extremities of said yoke above 50
the plane of the top of the beam, a pair of de
pending suspenders having threaded engagement
with the ends of said yoke to permit removal of.
the Suspenders after the concrete has set, and 55
means on said Suspenders for Supporting the
forms.
6. A hanger adapted to suspend temporary
forms from a beam in the construction of con
crete slabs comprising a yoke adapted to remain 60
embedded in the concrete and being of substan
tially inverted U-shape with threaded ends, a
pair of depending Suspenders at their upper ends
threaded to the ends of said yoke and having
threaded lower portions, and nuts on said lower 65
portions for supporting the forms, said nuts
being vertically Shiftable for adjusting the forms
either by the rotation of Said nuts relative to
Said Suspenders or by the rotation of Said Sus
penders relative to Said yoke.
`
7. A hanger adapted to suspend temporary
I claim:
forms from a beam in the construction of con
1. A hanger adapted to suspend temporary
crete slabs comprising a yoke of> Substantially
inverted U-shape adapted to remain embedded in
forms from a beam in the construction of concrete
75 slabs comprising a yoke adapted to remain em
70
the concrete, means on the ends of said yoke for 75
2,122,276
supporting the forms, and a pair of supporting
legs Welded to said yoke adjacent the ends thereof.
8. A hanger adapted to suspend temporary
forms from a beam in the construction of con
crete slabs comprising a yoke of substantially in
verted U-shape adapted to remain embedded in
the concrete, said yoke being in two sections
slidably connected together to permit extension
and contraction thereof, means on the ends of
10 said yoke for supporting the forms, and a sup
porting leg mounted on said yoke and spot welded
thereto.
3
9. A hanger adapted to suspend temporary
forms from a beam in the construction of. con
crete slabs comprising a yoke adapted to remain
embedded in the concrete, said yoke being in two
sections to permit extension and contraction
thereof, a pair of supporting legs mounted on said
yoke, one of said legs serving as a coupling for
slidably connecting said sections together, and
Suspenders on the ends of said yoke for support
10
ing the forms.
GEORGE B. BOSCO.
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