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Патент USA US2408084

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sept.24,1946.
w, E_ MACK
" T 2,408,082
EXPÁNDED METAL LOAD BEARING STRUCTURE
Flled Jung ¿1, 1944
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Patented sept. 24, 194e
UN‘ITEof‘sTATEs PATENT omer;
vÉiinPArîlilt'D METAL _LOAD BEARING
STRUCTURE
Wayne E. Mack, Martins Ferry, Ohio, assignori by
mesne assignments, to Wheeling Steelf Corpo
ration, Wheeling, vW. Va., a corporation of
Delaware
Application June 1, 1944, serial No. 538,285
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1
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12 Claims.
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2
y
This invention relates to expanded metal load
bearing structures of the type employed as walk
ways and material supports comprising a sheet
of expanded metal supported at two opposed
edges with reinforcing means applied to the ex
panded metal .between said edges. The inven
tion has to do With the reinforcing which is ap
fing’ generally transversely of said edges and re
spectively connected with the ends of the nrst
plied'to the expanded metal-_
v
' It has been proposed to provide a structure
ner along all strands entering the area of load
of the type above mentioned in which the ex
adjacent an unsupported edge causes relatively
great deflection as compared with the deflection
caused by a load applied at a point removed
panded metal is reinforced between the sup
ports by a series of parallel bars welded to- the
vexpanded metal and extending at right angles
to tl'ie supports. » In that structureno reinforcing
is provided parallel to the supports. >The trans
verse reinforcing bars have of necessity had to
be positioned close together, which necessitates
the employment of a considerable weight of ma
terial, resulting in a structure which is unde
mentioned bar. The second mentioned bars are
desirab-ly non-parallel to a transverse row of
bonds of t-he expanded metal.
Due to the diamond pattern of expanded metal
a concentrated load is distributed in fanlike'man
ing. A load applied to a sheet of expanded metal
from the unsupported edge because many of the
strands inthe area of loading terminate atthe
unsupported edge of the sheet instead of over
a support.l Due to this peculiar characteristic of
expanded metal I preferably arrangethe gen
erally transversely extending reinforcing por
tions or bars so' that they cross at least one trans
sirably heavy for itsload bearing characteristics 20 verse row' of bonds of the expanded metal. By
providing transverse reinforcing bars which cross
and which requires a great amount of time and
one or more transverse rows of bonds of the
labor for its fabrication.v Moreover, the closely
expanded metal I distribute the load with an
increased portion on strands which terminate
' ating solid shadow from overhead light passing 25 over' the supports and thereby reduce deflection.
spaced parallel transverse ’bars interferewith
the passage of light through the structure, cre
Other details, objects and advantages of the
Y
invention'will become Aapparent as the following
I have overcome the disadvantages of the prior
description'of certain present preferred embodi
structure by the provision .of an expanded metal
load bearing structure having superior load bear
ments 'thereof proceeds.A ing characteristics for its weight, which eiïects .30 In- the' accompanying drawing‘fl have shown
certain present preferred embodiments 0i the
an important saving in material; which can 'be
invention, in which
>
fabricated at relatively low cost and with a sub
Figure 1 is a fragmentary plan View of an ex
stantial saving in time and labor and which has
pandecl metal load bearing structure;
superior light transmitting characteristics.
I provide an expanded metal load bearing 35 Figure 2 is a vertical transverse cross-sectional
view taken on the line II-II of Figure 1 but to
structure which comprises a sheet of kexpanded
enlarged scale;
Y
metal supported at two opposed edges and re
Figure 3 is a fragmentary plan view of an ex-.
inforcing means applied to the expanded metal
panded metal load bearing structure similar to
between said edges, the reinforcing means com
prising a portion extending generally parallel to 40 vthat shown in Figure 1 but employing flattened
expanded metal; and
said edges and a` portion extending generally
Figure 4 is a fragmentary vertical transverse
transversely of said edges’. The generally trans
crbss-seotional view similar to Figure 2 but of
versely extending portion of the reinforcing
the form' of structure shown in Figure 3.
means preferably is disposed so that its trace _
in the plane of the sheet extends non-parallel :45 Referring now more particularly to the draw
at an angle therethrough.v
to a transverse row of bonds of theV expanded
metal.
ing,f"~th_’e >expanded vI’n'etal load bearing structure
shown: therein is of- the type which may be used
Preferably I employ generally trans
versely extending' portions of' the reinforcing
as» an overhead walkway in industrial plants or y
means which. are spaced along the structure and ~
as a catwalk atop railway freight cars. The sup'
porting structure consists oi opposed parallel
connected with the portion which extends gen
orally parallel to the supported edges.
'
I preferably employ reinforcing means com
prîsing a bar extending generally parallel to the
supported edges of the expanded metal approx
imately equidîstant therefrom and bars extendà
I-beam's 2 upon which the expanded Ymetal is
supported at' its edges. The expanded metal as
shown in Figures 1 and 2 is designated generally
by reference numeral 3 and is of conventional
form consisting of strands 4 connected by bonds
2,408,082
3
4
5 to form the typical diamond pattern. The ex
panded metal is preferably laid upon the I-beams
2 with the long dimensions of the diamonds of
the expanded metal extending transversely or
approximately at right angles to vertical planes
for the weight of metal employed than similar
containing the axes of the I-beams.
structures heretofore proposed, is relatively light
in weight, effecting a substantial saving in metal,
can lbe fabricated at relatively low cost and with
a substantial time and labor-saving and has su
perfor light transmitting «.properties. ~
While .I have shown . and describied certain
The ex
panded metal may be welded to the I-beanis.v A
walkway is made up of a series of sheets of ex
present preferred embodiments of the invention,
panded metal laid substantially edge-to-edge
along the I-beams.
Welded to the expanded metal 3 is reinforcing
means designated generally by reference numeral
6. lThe reinforcing means is preferably welded
it is to be distinctly understood that the inven
tion is not limited thereto but may be otherwise
variously embodied within the scope of the fol
lowing claims.
to the under side of the expanded metal so as to
leave the upper surface unobstructed. In the
form of structure shown in Figures l and 2 the
reinforcing means 6 comprises a bar 1 extend
comprising a sheet of expanded metal supported
at two opposed edges only and adapted to bear a
I claim: Y
1. An expanded metal load bearing structure
load between said edges and unitary reinforcing
means applied tothe expanded metal between said
ing parallel to the I-beams 2 and eduidistant
edges, the reinforcing means comprising a portion
therefrom and a pair of transverse bars 8 at op
posite ends of the bar 1. The bars 1 and 8 are 20 located substantially midway between said edges
`applied to the expanded metal by being welded
to the under side vthereof by suitable welds 9.
and extending generally parallel to said edges
and portions extending generally transversely of
said edges, each transverse portion -being about
Each of the transverse bars 8 is of generally
Wide open V shape in plan as shown in Figure 1
one-half the length of the first-mentioned por
and each of the ends of the bar 'l enters the V 25 tion.
2. An expanded metal load bearing structure
rof one of thel bars 8. Preferably the bars 'I and
comprising a sheet of expanded metal supported
8 are welded together so as to form in effect a
unitary reinforcing structure. Each of the trans
at two opposed edgesV and adapted to bear a load
between said edges and unitary reinforcing means
verse bars 8 has each of its legs non-parallel to a
transverse row of bonds of the expanded metal. .30 applied to the expanded metal between said edges,
the reinforcing means comprising a portion lo
Each of the legs crosses at least one transverse
Figure 1 each of the legs of each transverse bar
cated substantially midway between the edges
and extending generally parallel to said edges and
8 crosses two transverse rows of bonds of the
portions extending generally transversely of said
row of bonds and preferably more than one.
In
35 edges but whose trace in the plane of the sheet
is non-parallel to a transverse row of bonds of
The reinforcing structure just described may
the expanded metal, each transverse portion be
be applied to each of a series of sheets of ex
expanded metal.
,
panded metal laid substantially edge-to-edge
along the I-beams. In such case the longitudi
nal bar 1 of each such reinforcing structure is
preferably made somewhat shorter than the di
mension of the sheet of expanded metal to which
it is applied in the direction parallel to the I
beams so that the transverse bars 8 are disposed
in the vicinity of the unsupported edges of the
sheet. When a load is imposed on a sheet adja
cent an unsupported edge the reinforcing struc
ture effectively distributes that load so as to
minimize deflection. The transverse bar 8 ad
jacent the edge at which the load is applied dis
tributes the load to strands of the expanded metal
which terminate over the I-bearns and to which
the load would not as effectively be distributed
if the bars 8 were not provided or if they extended
parallel to the transverse rows of bonds of the
expanded metal.
40
ing about one-half the length of theViirst-men
tioned portion.
3. An expanded metal load bearing structure
comprising a sheet of expanded metal supported
at two opposed edges only and adapted to bear a
load between said edges and reinforcing means
applied to the expanded metal between said edges,
the reinforcing means comprising a portion lo
cated substantially mid-way between said edges
and extending generally parallel to said edges
and portions spaced along the structure extending
generally transversely of said edges and con
, nected with the first mentioned portion, each
transverse portion being about one-half the
length of the first-mentioned portion.
4. An expanded metal load bearing structure
comprising a sheet of expanded metal supported
at two opposed edges only and adapted to bear a
load between said edges and reinforcing means
applied to the expanded metal between said edges,
The structure shown in Figures 3 and 4 is iden
the reinforcing means comprising a bar extend
tical with that of Figures 1 and 2 except that in
ing generally parallel to said edges approximately
Figures 3 and 4 the expanded metal is shown as
having been flattened, that is, reduced to a truly 60 equidistant therefrom and bars extending gen
erally transversely of said edges and respectively
planar sheet with the faces of the strands and
connected with the ends of the first mentioned
bonds parallel to the plane of the sheet. In this
structure the expanded metal lies ñat against the
bar, the transverse bar, from its connection with
I-beams and reinforcing bars and is in contact
therfirst-mentioned bar to the edge of the sheet
with the beams and bars over a considerably 65 being about one-half the length of the first-men
greater area of the expanded metal than when
tioned bar.
y
5. An expanded metal load bearing structure
unflattened expanded metal is used as in Figures
comprising a sheet of expanded metal supported
1 and 2. Aside from this difference the structures
at two opposed edges and adapted to bear a load
are the same. Parts of the structure shown in
Figures 3 and 4 corresponding to parts of the 70 between said edges and reinforcingmeans ap
plied to the expanded metal between said edges,
structure shown in Figures 1 and 2 are designated
the reinforcing means comprising a bar extend
by the same reference numerals each with a prime
ing generally parallel to said edges approximate
afûxed.
ly equidistant therefrom and bars extendinggen
Thus I provide a superior expanded metal load
bearing structurein that it has greater strength 75 erally transversely of Asaid edges and respectively
2,408,082
5.
v
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e
connected with the ends of the ñrst mentioned
bar, the second mentioned bars VV:being disposed
at two opposed edges and reinforcing means ap
plied to the expanded metal between said edges,
so that their traces in the plane of the sheet are
non-parallel to transverse rows of bonds of the
the reinforcing means located substantially mid
way between said edges and comprising bar
expanded metal, and from their connection with
means Vextendinggenerally parallel to said edges
the first-mentioned .bar to the edge of the sheet
are about one-half the length of the ñrst-men
and bar means having portions extending ’at an
angle to each other extending transversely of
said edges at an end of the and connected to the
ñrstmentioned bar means, at least one o-f the
portions of the second mentioned bar means
crossing at least one transverse row of bonds of
tioned bar. -
6. An expanded metal load bearing structure
comprising a sheet of expanded metal supported
at two opposed edges only and disposed with the
the expanded metal, and being about one-half
long dimensions of the diamonds transverse to
said edges and reinforcing means applied to the
the length of the first-mentioned- bar means.
l0. An expanded metal load bearing structure
expanded metal between said edges, the reinforc
ing means comprising bar means located sub 15 comprising a sheet of expanded metal supported
at two opposed edges, disposed with the long di- '
stantially midway 4between said edges and extend
ing generally parallel to said edges and bar means
mensions of the diamonds transverse to saidv
connected with the first mentioned bar means
edges and adapted to beara load between said n
and extending generally transversely of said
edges and'reinforcing means applied> to the ex
edges, the second-mentioned bar means from its 20 panded metal between said edges, the reinforcing
means comprising a bar extending generally par
connection with the first bar means to the edge
of the sheet being about one-half the length of
allel to sai-d edges approximately equidistant
the first-mentioned bar means.
therefrom and generally V-shaped bars at the
7. An expanded metal load bearing structure
ends of the first mentioned bar, each of the ends
comprising a sheet of expanded metal supported 25 of the first mentioned bar entering the V of one
at two opposed edges and disposed with the long
of the second mentioned bars.
dimensions of the diamonds transverse to said
11. An expanded metal load-bearing structure
edges and reinforcing means applied to the ex
comprising a sheet of rexpanded metal supported
panded metal between said edges, the reinforcing
at'two opposed edges and disposed with the long
means comprising bar means located substantially 30 dimensions of the diamonds transverse to- said
midway between the said edges and extending
edges and reinforcing means applied to the ex
generally parallel to said edges and bar means
panded metal between said edges, the reinforcing
connected with the first mentioned bar means
means comprising bar means extending generally
and extending generally transversely of said
parallel to said edges and terminating closely ad
edges, the second mentioned bar means crossing 35 jacent the ends of the expanded metal sheet and
at least one transverse row of bonds of the ex
bar means connected with the first-mentioned'
panded metal, and from its connection vwith the ' bar means and extending generally transversely`
first-mentioned bar meansito the edge of the
of said edges, the second-mentioned bar means
sheet being about one-half the length of the first
crossing at least one transverse row of bonds of
mentioned bar means.
8. An expanded metal load bearing structure
comprising a sheet of expanded metal supported
' at two opposed edges and reinforcing means ap
plied to the expanded metal between said edges, ~
the reinforcing means comprising bar meansex
tending generally parallel to said edges and ,bar
>means extending generally transversely of said
40
the expanded metal.
12. An expanded metal load-bearing structure
comprising a sheet of expanded metal supported
at two opposed edges and reinforcing means ap
plied to the expanded metal between said edges,
45 the reinforcing means comprising bar means ex
tending generally parallel to said edges and ter
minating closely adjacent the ends of the ex
edges at an end of the flrst mentioned bar means,
panded metal sheet and bar means connected
the second mentioned bar means extending from
with the first-mentioned bar means and extend
said end of the ñrst mentioned bar means in the 50 ing generally transversely of said edges, the sec
direction of the opposite- end of the first men
ond-mentioned bar means crossing at least one
tioned bar means.
transverse row of bonds of the expanded metal.
9. An expanded metal load bearing structure
comprising a sheetof expanded metal supported
WAYNE E. MACK,
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