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Патент USA US2116335

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May 3, 1938.
G. B. Bosco
WRÃPPING FOR STRUCTURAL SHAFES
Filed June l' 1957
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2,116,335
Patented May 3, 1938
2,116,335
UNITED NSTATES PATENT
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2,116,335
WRAPPiNG FOR STRUCTURAL sHAr-Es
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¿George B. Bosco, Chicago, Ill.
Application Jane 1, 1937, serial N0. 145,733
7 Claims. (C1. 72ans)
f lThis invention relates to reinforcing systems
ï 5
for ‘concrete construction work and more particu
to each other and secured to supporting chairs IIJ I
which also serve as form spacers.
larly to the ‘wrapping used in concrete ñreproof
ing in connection with structural steel shapes,
of uniform cross section which may vary in gauge
Vsuch as girders, beams, joists and columns.
'I‘he main‘objects of this invention are to pro
depending upon the requirements.
‘ vide an improved form of structural shape Wrap
its ends may be wrapped around the edges of the
adjacent flange of the I-beam and the extremi
ping which is adapted to be completely assem
bled together with the longitudinalv reinforcing
rods- and attached to the soñit form before the
mold is assembled thereby insuring accuracy in
the placement of thaw-rapping; to provide a
wrapping having improved ‘means for attaching
‘ the wrapping to the soflit form and for spacing
the sofiìt form from the beam or other structural
fshapeyto provide improved means for securing
ßsaid‘form spacing and attaching means to the
‘transverse reinforcing wires of the wrapping; to
provide improved means for attaching the wrap
ping to the longitudinal reinforcing wires; and to
provide an improved wrapping of this kind which
is simple and comparatively inexpensive and
which may be accurately placed in proper posi
tion even by unskilled labor.
`
An illustrative embodiment of this invention is
i
ties are looped as shown at II to minimize the
danger of injury to the hands of the workmen in:< li)
assembling the structure.
In the form shown in Figures 1 and 2, the
wrapping is used in connection with three longi
tudinal reinforcing bars or rods I2, I3 and I4.
The centrally located bar I2 rests on top of the
cross rods 9 and is spot welded thereto. The
outer rlongitudinal bars I3 and I4 are loosely sup
ported in loops I5 which are formed in the cross
rods 9.
'
In the form shown in Figure 3, only a single
longitudinal reinforcing bar I2.I is used and this
is loosely supported in a loop I5.I of the cross
rod 9.I.
In the construction shown in Figure 4, `the sin
gle longitudinal reinforcing bar |22 is spot Weld
ed to the cross rod 9.2.
The improved supporting and spacing chair I0
is preferably a sheet metal stamping which is
bent to substantially U-shaped cross section, as
illustrated in Figures 5 and 6. Formed on the
lower edge, is a pair of prongs IE adapted to be 30
forced into the top surface of the sofût form.
To prevent waste of material in the blanking
.
wrapping embedded in the concrete, the form not
yet having been dismantledFigures 3 and 4 are fragmentary perspectives
of alternate forms of wrapping.
Figure 5 is an enlarged perspective of one of
the improved spacers.
Figure 6 is a fragmentary perspective of the
spacer attached to a transverse reinforcing bar.
In the construction shown, the improved wrap
ping is applied to a structural steel I-beam or
girder I which is ñreproofed with concrete 2
which is poured into the usual temporary form
operation, these supporting and spacing chairs
are stamped from strip- material so that 4the
prongs of one chair are formed from the material
of an adjacent chair, thereby leaving recesses I1
in the upper edges of each chair. If desired these
recesses Il may support additional cross bars.
Struck out from the chair, is a tapered lug I8 40
which forms a shoulder I9 on which the cross
rod 9 is seated.
After the cross rod has been
port the usual sofñt form 4 and sides 5. The
form sides 5 are usually nailed to the soñit form
4 and braced by vertical battens 6 which are in
turn secured against outward movement by kick
ers l'. The entire form is suspended from the
dropped into its seat, the free'end of the lug I8
is bent over the rod as shown in Fig. 6, thereby
iirmly securing the chair to the cross rod against 45
displacement crosswise of the latter.
In operation, with this improved construction,
the wrapping and reinforcing bars may be accu
rately placed on the soñît of the form before the
I-beam by any suitable means, such as the band
mold is assembled.
clamps 8.
In the form shown, the improved wrapping
sembled reinforcement is lifted into proper posi
tion, the band clamps 8 are fastened and the ends
of the cross bars S are then Wrapped around the
bottom flange of the I-beam. After the concrete
has set and the mold is dismantled, the prongs 65
comprising horizontal battens 3 arranged to sup
' [3
Cn
Figure l is a fragmentary perspective of a beam
mold showing a portion of one form of beam
Figure 2 is a transverse section of a reinforced
and iireproofed girder or beam with the improved
1
The cross rod B is of sufficient length so that `
shown in the accompanying drawing, wherein1--y
wrapping.
I
The rods 9 are preferably formed of round Wire
comprises a plurality of transverse reinforcing
rods 9, of substantially identical construction,
ci arranged in substantially parallel spaced relation
After the sofñt and the as
2
10
2,116,335
I6 project beyond the face of the concrete but
spectively attached to said transverse bars and
these may be readily cut off if desired.
adapted to have a bearing on both the structural
It is obvious that this improved wrapping is
equally well adapted for use in vertical columns.
Although but certain specific embodiments of this
invention have been herein shown and described,
it will be understood that details of the construc
shape and the form for spacing said transverse
bars from both the shape and the form.
5. A` reinforcing wrapping for application to a.
prising a plurality of laterally spaced flexible
tion shown may be altered without departing
from the spirit of the invention as defined by the
transverse reinforcing bars each formed with a
loop therein and adapted to lie between the struc
following claims.
I claim:
1. A reinforcing wrapping for application to a
structural shape within a temporary form, com
prising a transverse reinforcing bar adapted to
15 lie between the shape and one of the form sides,
and a separately formed spacer locked to said
transverse bar against displacement crosswise
of the latter and having portions thereof adapted
to contact the structural shape and the form for
20 spacing said bar from both the shape and the
form.
2. A reinforcing wrapping for application to a
structural `shape within a temporary form, com
prising a transverse reinforcing bar adapted to
25 lie between the shape and one of the form sides,
and a separately formed spacer locked to said
transverse bar against displacement crosswise of
the »latter and having its ends adapted to contact
opposed surfaces of the structural shape and the
30 form for spacing said bar from both the shape
and the form.
3. A structural shape wrapping, comprising a
,plurality of flexible transverse reinforcing bars
`adapted to have their ends bent over a portion of
35 the structural shape, a longitudinal reinforcing
rod secured to and spacing said transverse bars
lengthwise of the structural shape, and spacing
chairs attached to the respective transverse bars
and provided with means for attachment to a
40 form.
4. A reinforcing wrapping for application to a
structural shape within a temporary form, com
prising a plurality of parallel transverse rein
forcing bars adapted to lie between the shape
45 and one of the form sides, a longitudinal rein
forcing rod secured to and spacing said trans
verse bars, and separately formed spacers re
structural shape within a temporary form com
tural shape and one of the form sides, a longi
10
tudinal reinforcing rod overlying and attached to
said transverse bars, another longitudinal rein
forcing rod extending through the loops of said
transverse bars, and a separately formed spacer
attached to each transverse bar and adapted to 15
have a bearing on both the structural shape and
the form for spacing said transverse bars from
both the shape land the form.
6. A reinforcing wrapping for application to a
structural shape within a temporary form com 20
prising a plurality of laterally spaced flexible
transverse reinforcing bars each formed with a
plurality of 4loops spaced lengthwise thereof and
yadapted to lie between the structural shape and
one of the form sides, a central longitudinal re
inforcing rod overlying and attached to 'said
25
transverse bars, a plurality of longitudinal re
inforcing rods respectively extending through the
»loops of said transverse bars on opposite sides
of said central rod, and a pair of separately 30
formed spacers attached to each transverse bar
and adapted to have ~a bearing on opposed sur
faces of the structural shape and the form for
spacing said transverse bars from both the shape
and the form.
35
'7. As a new `article of manufacture, a chair for
supporting a transverse reinforcing bar and
spacing the same from opposed surfaces of a
structural shape and a temporary form, consist
ing of a sheet metal stamping bent to substantially 40
U-shaped
cross-section;
said
chair
having
squared ends, a flexible .struck-out lug on its con
vex side adapted to seat and embrace said re
inforcing bar, a pair of alined notches in its
sides adapted to seat another reinforcing bar, and
a pair of pointed prongs on one end.
GEORGE B. BOSCO.
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