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Патент USA US2125692

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v .Aug. 2, 1938.’
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-_E. J.‘W. RAGSDALE ET AL‘ ,
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2,125,692
BEAM STRUCTURE
Original Filed April 27, 1952
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INVENTORS
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EARLlWRAesDALE
BY
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ALBERT GDEAN.
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XQa/QW
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>
ATTORNEY.
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' Patented Aug. 2, 1938
2,125,692 ,
UNITED STATES PATENT OFFICE
2,125.69;
nmn-s'muc'rmr:
Earl J. W. Ragsdale, Norristown, and Albert G.
Dean, Narberth, Pa., assignors to Edward G.
Budd Manufacturing Company, Philadelphia,
Pa., a corporation of Pennsylvania
Original application April 2'1, 1932, Serial No.
607,690,. Divided and this application April 13. _
1936, Serial No. ‘14,135
5 Claims.
This invention relates to , improvements in
(Cl. 189-37)
be used and further economies can be obtained in
structural members and more particularly to an
case of fabrication and in eliminating corrosion .
improved beam or girder which is particularly
adapted to be fabricated from thin, light gauge
factors.
5 sheet metal strips suitably formed into the desired
, cross section. It is more particularly a division
rof our co-pending application, Serial Number
607,690 ?led April 2'7, 1932 for Rail‘ car body.
One of the principal objects of this invention
10 is to provide an improved beam, girder, column or
the like having a decreased quantity and there
. fore weight of metal, in which the cost of the
structure can be greatly reduced, and one in which
the manufacture and assembly is especially facili
tated as by adapting the respective parts to
spot welding.
,
‘
A further object of the invention is to provide
an improved sheet metal beam, girder, column or
the like which has a maximum strength con
sidering the amount and kind of material em
ployed, and one which is highly effective in opera
.
In the preferred construction, each chord mem
ber H or I2 is preferably of angular cross section
having a ?ange, as Ila for example, running
along the length of the web and secured to it as by
spot welding.- Another ?ange Hb extends later
ally outward from the edge of the web and gives
the structure a lateral stiffness while cooperating
with the ?rst ?ange to make a longitudinally ex
tending angle at the edge of the web. This later- ‘
ally extending ?ange lib also serves as a support
for the cover plates l6 which form the chord
15
members into closed box sections.
In this construction, each set of longitudi
nally extending angles is part of the same chord.
member, being joined through internally extend
ing ?ange lic having longitudinally extending
tion and readily adaptable for cooperation with
bead l|d,1but this is principally because of the 20
ease of forming a channel shaped member with
outwardly projecting ?anges. From a structural
appurtenant parts.
standpoint however, the longitudinally extending
_
angles at the sides of the webs are the principal
elements of the chords, the internal ?ange or 25.
channel bottom serving to space the web plates
l4, and giving some-additional stiffness. _
The truss web plates may be relatively thin
to form a box-like structure and. in which all of ' gauge stockas compared with the gauge of the
30 the parts are relatively narrow sheet metal strips
chord members H and I2, although considerable 30
preferably of a high tensile stainless, steel spot variation is possible as all of the beam elements
are formed from separate strips. These web
welded together.
Further objects and advantages of the inven-' plates are divided by diagonal indentations I5
tion will appear from the following description into a plurality of rectangular portions, which
= of a preferred form of embodiment thereof taken portions are prevented from “dishpanning” 35
A further and more specific object of the in
25 vention is to provide an improved box beam con
sisting of angular cross section chord members
and web nfembers which are vertically stiffened
longitudinally of the beam, such beam being closed
in connection withv the attached drawing, in
which:
_
Fig. 1 is a perspective view of the beam in ac
cordance with the invention.
40 a Fig. 2 is a side elevation of a part of the beam
shown in Fig. 1.
Fig. 3 is a horizontal section taken substan
tially along the line 3-3 of Fig. 2.
The preferred form of embodiment of our in
45 vention is generally represented‘ by beam ill of
truss type having upper and lower chord mem
bers If and [2, intermediate and bodily spaced
plate webs l4, cover plates Hi, and longitudinally
spaced, vertically extending stiii‘eners'lB. Each
of these parts is conveniently made from sheet
metal strips of relatively narrow gauge and formed
through the stiffened indentations.
These rectangular portions are further de?ned
by channel shape reenforcing ~vertical truss mem
bers l8 extending from chord ?ange to chord
?ange and presented outwardly of ‘the beam and 40
welded by their bottoms to the web plates I4.
The bottoms of these strut members may be
stiffened and rendered more rigid by the offset Hi.
It is of course to be understood that the webs
might be sti?ened by angles or be of other shapes 45
to support transverse loads.
The channels iii are
welded in place prior to the welding of the webbing
to the chord members I I and I2, and accessibility
for welding of all parts is attained thereby.
The cover plates 16 are conveniently secured
into the desired cross sections as by well known
to the outwardly projecting ?anges of the chord
members as by spot welding, such operation
machinery, the formed pieces being subsequently
spot welded for extreme lightness with maximum
55 strength.‘ If desired. stainless alloy steels may
preferably taking place after the web plates are
These
plates l6 may be ?at or of centrally depressed
secured to the chord member ?anges.
2
2,125,692
section, forming a channel which cooperates
with the chord member ?anges to maintain the
spacing of the webs. If desired, the outer edge
of the plates l6 may be formed into ?anges at
right angles to the main plane of the plates to
facilitate attachment of other structural ele
ments.
In this construction, the truss elements can
readily be arranged to take the predetermined
10 loads to be applied to the beam in a most e?icient
manner and it will be apparent that various ele
ments may be of different thickness without
interfering with the ready fabrication of the
beam. Furthermore, all of the elements are
initially of such open section that the parts may
be effectively welded each to the other in a con
tinuously operating welding machine, if so de
sired. The beam is symmetrical with respect to
‘a vertical longitudinal plane and each chord,
20 as well as the entire beam, is of box shape having
great rigidity and resistance to bending. Such a
beam thus has a general application.
While we have described a preferred form of
embodiment of the invention, it is obvious that
25 other modi?cations may be made thereto and it
is therefore our aim to cover broadly the dis
closure herein and as more particularly set forth
in the claims appended hereinafter.
What we claim is:
30
1. A beam comprising a pair of bodily spaced
webs, a one-piece angular chord member having
?anges extending along the edges of said webs
and being secured to the edge portions of the
respective webs, other ?anges extending laterally
35 outwardly of said webs, and a bridging chord
member of channel section ?tted between portions
.of the angular chord member and across the edges
of the webs and having ?anges overlapping
?anges of the angular chord member and se
40 cured thereto, the channel section of the bridging
chord member spacing the webs apart through
engagement of the side walls of the channel
cross section with the chord member.
2. A beam comprising a pair of spaced sheet
45 metal web members, a chord structure spacing
and joining adjacent ends of said web members,
said
chord > structure
including
substantially
right angular side portions each having one
?ange overlapping and secured to the adjacent
50
web member, one ?ange extending inwardly and
another ?ange extending laterally outwardly
from said ?rst named ?ange, and a closing strip
having shoulders abutting and spacing the
55 angular chord side portions and overlapping said
laterally extending ?ange of the angular side
portions and secured thereto.
3. A beam comprising a pair of spaced sheet
metal web members, a chord structure spacing
and joining adjacent ends of said web members.
said
chord
structure
including ' substantially
right angular side portions each having one
?ange overlapping and secured to the adjacent
web member
and
another
?ange
extending
laterally outwardly from said ?rst named ?ange, 1O
and a closing strip having shoulders abutting and
spacing the angular chord side portions and
overlapping said laterally extending ?ange of
the angular side portions and secured thereto,
the ?anges of the chord side portions overlapping
the web members being transversely intercon
nected at their inner margins and being integral
with respect to each other.
4. A beam comprising a top chord structure, a
bottom chord structure, and a web structure, said 20
web structure including spaced metallic sheets,
transversely extending longitudinally spaced web
reenforcing means having outwardly projecting
?ange portions, said web structure extending be
tween and being secured to the respective chord
structures, one of said chord structures including
a side chord member extending along the edge of
each web sheet and having a portion extending
in the direction of the body of the web sheet and
overlapping the same and secured thereto in said
region of overlap, an outwardly extending por
tion beyond the edges of the web sheet and an
inwardly extending web stabilizing ?ange ex
tending from said web overlapping portion, and a
through-running bridging chord member se
cured to the side chord members and spacing
the web sides.
5. A closed box section beam of the class de
scribed comprising chord members and web
members, said web members being spaced by said 40
chord members, said web members being secured
adjacent their ends to portions of the respective
chord members, said chord members having
other portions overhanging said web members
and longitudinally extending bridging members
secured to the overhanging portions of said chord
members in the overhanging region, and having
shoulders to additionally aid in spacing said web
members and to close the space between said
web members, said chord members being of deep,
internally closed channel shape, constituting,
with the bridging members, closed box section
chords.
EARL J. W. RAGSDALE.
ALBERT G. DEAN.
55
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