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Патент USA US3083803

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April 2, 1963
R. B. BROUT
3,083,793
MEMBRANE SUSTAINED ROOF‘ STRUCTURE
Filed Sept. 21, 1959
3 Sheets-Sheet 1
April 2, 1963
R. B. BROUT
3,083,793
MEMBRANE SUSTAINED ROOF STRUCTURE
Filed Sept. 21 , 1959
3 Sheets-Sheet 2
April 2, 1963
R. B. BROUT
3,083,793
MEMBRANE SUSTAINED ROOF STRUCTURE
Filed Sept. 21, 1959
3 Sheets-Sheet 3
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ltfEMhRAl‘lE SUSTAENEE PLQGF STRUCTURE
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Patented Apr. 2, 1963
2
tional views taken, respectively, on the lines 9—~9 and
lit-19 of FIG. 7,
‘ FIG. 11 is a further enlarged, medially longitudinal
fragmentary view taken on the line ill-11 of FIG. 7
showing a representative means for interconnecting the
base components of the structure,
FIG. 12 is a view similar to FIG. 4 except showing the
parts assembled and illustrating another mode of secur
This invention relates to building construction and
more particularly to an improved type of roof and roof
ing the roof membrane component to the truss structure,
truss structure.
and
FIG. 13 is an enlarged, fragmentary sectional view of
The principal object of the invention is to provide a
a portion of the roof forming membrane taken on the
generally horizontally extending component of a build
line 13-43 of FIG. 7.
ing structure, e.g., "a roof, which comprises a rigid periph
eral bounding means to which a stress transmitting mem
In the illustrated embodiment of the invention, the
brane constituting a roof surface is attached to cover 15 principal modular components are the base component 1
and the tripod component 2. Each component is prefer
the area enclosed by said rigid bounding means and also
ably for-med of lengths of tubular material welded to
to which bounding means a truss system is attached which
gether.
is below, parallel and coextensive with the membrane
Each base component comprises a hexagonal, ?at, ring
and which is attached to the membrane at a plurality
portion formed of members 3 joined at corners designated
of regularly spaced points to combine with the membrane
alternately as 4 and 4' and having outwardly projecting
as the top chord component of said truss structure to
arms 5 of half of the length of the members 3 projecting
transmit all stresses imposed on said membrane and truss
radially in the plane of the ring from the center of the
structure to the said rigid bounding means.
ring at each corner thereof. Also, at the corners 4’,
Another object of the invention is to provide a roof
the component includes upwardly converging arm por
truss structure composed of a minimum number of dif
tions 6 adapted to mate with the downwardly diverging
ferent modular elements and interconnecting means
iarm portions 7 of the tripod component 2, the upper ends
therefor ‘and which acts to transmit the stresses of an outer
of the tubes comprising the arm portions 7 being welded
skin or membrane secured thereto to a rigid, peripheral‘
to a cylindrical plug 8 having a bore 9 extending there
bounding means.
A further object of the invention is to provide a roof 30 through in a line centrally of the arm portion 7 and the
outer end of said bore preferably being threaded. Each
membrane supporting truss means which is coextensive
of said corners 4' further includes a pair of diagonally
with the membrane and is effective to transmit the stresses
outwardly and ‘upwardly diverging \arm portions 10‘, 10
of the roof forming membrane element in all directions
which combine with the arm portion 7 which rises from
and which truss means is composed of modular elements
which ‘are adapted to be readily assembled ‘and are of 35 the same corner to form, in e?ect an inverted tripod
which, except for the plug portion previously referred to,
such simple character as not to require ‘a high degree of
is of the same general dimensions as the tripod 2. The
skill to be combined into the roof supporting truss struc
upper ends of the numbers 10, It} all terminate in the
ture.
Robert Benedict Brent, 4215 Toiuea Lake Ave,
Burbank, Caiif.
Filed Sept. 21, 195d, Ser. No. $41,162
it t'liairns. (@l. res-s4)
With the foregoing objects in view, together with such
same plane as the upper ends of the arm portions '7. The
additional objects and advantages as may ‘subsequently
function of these pairs of arm portions 19, 19 will be dis
cussed in connection with the description of the erection
appear, the invention resides in the parts and in the con
of a roof supporting truss structure ‘from these two modu
struction, combination and arrangement of parts de
lar components and their connecting means.
scribed, ‘by Way of example, in the following speci?ca
tion of certain presently preferred embodiments of the 45 ' Adjacent each tree end of each tripod arm portion
7 it is provided with aligned transverse holes '11. Each
invention, reference being had to the accompanying draw
arm portion 6 inwardly from the upper or free end
ings which form a part of said speci?cation and in which
thereof is provided with a transversely extending bolt or
drawings:
rivet ‘12 and outwardly therefrom with a pair of aligned
FIG. 1 is a top plan view of one each of the principal
transversely extending holes 13. The illustrated connect
modular elements from which the supporting truss struc
ing means for the adjacent ends of each pair of arm por
ture of the present invention is formed,
FIG. 2 is a side elevational view of the assembly shown
in FIG. 1 as viewed from the lower side of FIG. ‘1,
FIG. 3 is ‘an exploded view of the component parts
of the assembly shown in FIGS. 1 and 2,
FIG. 4 is an exploded view, partly in section, showing
one mode of attaching the membrane to the roof struc
ture,
tions 6 and 7 comprises a collar 14 having a counterbore
15 on one side thereof in which the end of a depending
arm portion 7 is inserted ‘and secured by ‘a set screw 16;
the collar having an axial bore which is substantially the
same diameter and is in substantial alignment with the
inside of the tube on which it is mounted. The body
of the collar 14 beyond the end of the arm portion '7 is
provided with a set screw 17 which initially holds a loosely
FIG. 5 is a greatly enlarged fragmentary medial sec
tional view taken on the line 5-5 of FIG. 1 showing the 60 ?tting dowel pin 18 moved upwardly into the arm por
tion 7. When the tripod 2 is set on the arm portion 6,
nature of a preferred form of interconnecting means be
the set screws 17 in the collars 14 are loosened land the
tween arm portions of the different modular components,
loosely ?tting dowel pins ‘18 drop down until they engage
FIG. 6 is a View similar to PEG. 5 but showing the
relation ‘of the parts prior to the completion of the joint
the rivets 12 after which, the dowel pin is drilled through
between them,
65 at the holes 11 and 13 and rivets 19 and 2!)‘ ‘are secured
FIG. 7 is a top plan view of a portion :of a roof em
therein to hold the dowel pin in place. Alternatively, the
bodying the present invention, a portion of the outer skin
or membrane which forms the roof surface being broken
pin 18 can be welded to the arm portions.
Where it is desired to accommodate a curved or domed
away to show the truss structure to which it is attached,
con?guration in the roof, the tripod element can be ‘ap
MG. 8 is a transverse sectional view taken on the line 70 propriately tipped or canted relative to the base com
8—8 of FIG. 7,
ponent 1 by the use of collars 14 of different lengths on
FIGS. 9 and 10 are enlarged scale, fragmentary, sec
the various arm portions thereof. Such changes in spac
3,083,793
’
3
ing are slight for ‘any one tripod component and can be
upper side of the membrane to accommodate the body
accommodated by appropriately springing the various ‘arm
portions of the components slightly to effect alignment
of the screw.
thereof.
is corrugated to provide stiffness and which ‘at the same
time is complementary to the pattern of the attachment
thereof to the lapices of the tripod components 2. To
this end, the material is provided in strips having a re
.
Referring to FIGS.'7' and 8, there is illustrated a rep
resentative installation of a truss and membrane roof
structure embodying the invention. In that embodi
The material (sheet metal) forming the roof membrane
peating pattern of such character that the side edges of
ment, 1a channel member 23 is positioned on, the top, of"
the strips can be matched for butt welding together with
ailwall W with the channel thereof facing inwardly, one
side edge 24‘ resting on the Wall and. the other side 10 maintenance of the pattern. Since any pattern which
edge 24' thereof, having’ the perimeter of the sheet metal
will thus provide stiffness in the roof membrane may be
employed, the illustrated pattern is to be regarded as an
roof membrane 25 attached thereto in any suitable man
ner tasty rivets 26. The channel member extends, of,
course, around the entire peripheral. edge of the. roof
example only and not as the ‘only pattern-Which might be
used. The illustrated pattern comprises ?rst, a series of
membrane. While inv the illustrated embodiment a sheet
15 flat‘ circular lands 32 adapted to rest on the ends of the
metal membrane is shown, any comparable material
capable of serving as the roof surface and having suf?~
cient strength to transmit the tension and compression
forces imposed thereon as the top chord component of"
the truss system may be used‘.
At spaced points along the inner surface of the, web
portion of the channel member 23, it is providedwith in
wardly extending bracket members 27 on which the sides
tripod components 2 for securing thereto. The corruga
tions comprise a ?rst series of upwardly embossed ridges
33 each extending between adjacent ones of the lands
32 and each of said ridges increasing slightly in width and
height from the ends to the mid-length thereof. It will
be noted in FIG. 7 that these ridges de?ne triangular areas
and disposed within each of these triangular areas is one
ofa second seriesof upwardly embossed corrugations 3,4
3- or other adjacent portions of those of the base com
grouped to form a narrow armed, three pointed star dis
ponents 1 which come in contact with the channel mem 25 posed with the arms thereof pointing toward the centers
of the angles of the said triangular areas de?ned by the
ber are supported; said side members or other parts of the
base components ‘being secured to the channel‘ member
23 and to the brackets 27 many suit-able manner as, for
first series of ridges.
When the roof structure has been completely installed
and all portions of the truss structure have been connected
example, by welding 28. This roof membrane is, of
course, formed of separated sheets which are“ joined by 30 and the membrane completely connected‘ to all of the
tripod components, the supporting scaffolding or stag
ing can be removed and thereafter the stresses imposed
the plane in which it lies. It will be noted that for. those
on the membrane 25 between its various points of at
tachrnent around its perimeter and to the ends of. the
base components which rest on the brackets 27, the por
tions which project outwardly beyond. the bracket en 35 tripod components will be distributed throughout the en
buttwelding the edges as at 29 to form a unitary. compo
nent capable of transmitting stresses in all ‘directions in
gaging portion thereof are dispensed with. Rather than,
tire truss and structure and accumulated in the bounding
make up special base components for such usage, as a
means to hold the ventire roof ina position in which it
rule, it will be found, more practical to make all base
components alike and to alter the few that occupy the
edge of the truss construction by removing the interfering‘
portions thereof as an incident of the erecting operation.
The truss structure unit comprisingthe base and tripodvv
components 1 and 2 is ?rst erected on :a scaffold orstag
ing structure‘ holding them in position. Each base com
ponent is connected by the sleeves 21 and rivets 22 with.
the surrounding base components and each side of each
base component combines with the sides of adjacent com
was erected.
ponents to form horizontally disposedrhexagonal, fiat
rings composed of three side members .3 ofv three, base‘
components, generally designated as being av ?rst. series
‘
While in the foregoing speci?cation there has. been
described a presently preferred embodiment of'the inven-.
tion together with certain suggested variations thereof, it
will be appreciated that such disclosure isby way of‘
example only and that» in the light of'such disclosure,
changes and modi?cations in the
and in the con
struction, combination and arrangement of parts, may
suggest themselves to others skilled in the art. For ex
ample, while a hexagonal pattern of truss is shown, it
will‘ be obvious that any other regular polygon may be
employed, if desired. Accordingly, it will be understood
that the invention is not be be deemed to be l'mJi-ted
of polygonsor hexagons, arranged, alternately with three.
to the form thereof thus disclosed by way of. example,
sides formed from the juncture of two arm portions. 5,, 5 .
‘and it will be understood that the invention includes as
well all ‘such changes in, the parts and :in the construc
tion, combination and ‘arrangement of parts as shall come
within’the purview of the appended claims.
of two base components, generally designatedes being. a
second series of polygons or hexagons. 'I‘hroughthe up
wardly' inclined arms 1th of such adjacent three base
members, other tripod components 2 are mounted on the.
converging farm portions :10 thereof thus further intercon
meeting the base components.
~
When at least some of the base components and tripod
components are thus assembled over a su?icientyarea, the
, attachment of ‘the roof membrane 25 can proceed. After
I claim:
‘
.
‘ 1. In. a roof membrane sustained roof structure, a
unitary rigidmembrane- capable of resisting both tension
and compression forces in all directions in the plane in
which said membrane lies constituting the roof surface
and a co-extensive, underlying truss system connected to
said membrane at spaced points throughout the area
being attached to the peripheral channel. member 23,
thereof; said membrane, by reasonof said connection,
and laying on the ends of the plug portions 8 of the
additionally servingv as the top chord component of said
tripod components 2, the roof membrance can be drilled,
65
truss system; said truss system comprising a plurality of
through the holes 9 of the tripod components and then;
rigid members connected together, to form a plurality of
can be redrilled from the upper surface thereof to accomé
hexagons ‘disposed in a plane generally parallel to and'
modate the body of the screw 30 which threadedlyem
at a predetermined distance below the plane of said mem
gages the hole 9 :andwhichwith a washer 31 secures the
membrane to the ends of the tripod. Alternatively, in 70 brane' and each of said hexagons having a series ‘of three
rigid members similarly, convergingly rising from alter
stead ofthreadedly engaging the plug 8, the hole 9 can be
nate corners thereof and terminating in an apical point
formed without threads and a bolt 30a'with the washer
all of said apical points being secured to said membrane
31 can be secured ‘by :a nut 30!) on the lower face of the
plug 8. as shown in FIG. 12. Under those conditions, it
would be unnecessary to redrill the'memhrane from the
in, a uniformly spaced pattern.
‘
2. In a roof membrane sustained roof'structure, a
unitary rigid membrane capable of resisting both tension
3,083,793
5
6
and compression forces in all directions in the plane in
which said membrane lies constituting the roof surface, a
co-extensive, underlying truss system connected to said
membrane at spaced points throughout the area thereof;
said membrane, by reason of said connection, additionally
members connected together to form a plurality of hexa
gons disposed in a plane generally parallel to and at a
predetermined distance below the plane of said membrane;
certain of said rigid members being permanently united
serving as the top chord component of said truss system;
to form at least one of said hexagons and having arm
portions of not more than half the length of a side of the
said truss system comprising a plurality of rigid members
connected together to form a plurality of hexagons dis
hexagon projecting from each corner in directions which
posed in a plane generally parallel to and at a predeter
mined distance below the plane of said membrane and
each of said hexagons having a series of three rigid mem—
further having other rigid members extending converging
ly upwardly and forming an apical portion connected to
bers similarly, convergingly rising from alternate corners
thereof and terminating in an apical point all of said apical
points being secured to said membrane in a uniformly
spaced pattern, and a rigid peripheral element to which
the periphery of said membrane and the portions of said
unitary rigid membrane capable of resisting both tension
and compression forces in all directions in the plane in
a predetermined distance below the plane of said mem
brane and each of said hexagons having a series of three
certain individual base components, and a second series
rigid members similarly, convergingly rising from alter~
ported by a series of three interconnected ones of said
base components; the apical ends of all of said tripod com
ponents being attached to said roof membrane in a uni
are radial with respect to the center of the hexagon, and
said roof membrane.
6‘. In a roof membrane sustained roof structure, a
which said membrane lies constituting the roof surface and
a co-extensive, underlying truss system connected to said
hexagon forming rigid members constituting the periphery
membrane at spaced points throughout the area thereof;
of said truss system are attached in said parallel spaced
said membrane, by reason of said connection, additionally
relation.
serving as the top chord component of said truss system;
3. In a roof membrane sustained roof structure, a 20 said truss system comprising a plurality of base compo
unitary sheet metal membrane constituting the roof sur
nents and a plurality of tripod components; each of said
face and a co-extensive, underlying truss system connected
base components comprising a rigid, hexagonal ring dis~
to said membrane at spaced points throughout the area
posed in a plane parallel to and below the plane of said
roof membrane and having radially extending arms adapt
thereof; said membrane, by reason of said connection,
additionally serving as the top chord component of said
ed to be rigidly connected to like arms carried by other
truss system; said truss system comprising a plurality of
base components with resultant formation of other iden
rigid members connected together to form a plurality of
tical hexagonal rings in said plane, a ?rst series of said
hexagons disposed in a plane generally parallel to and at
tripod components having the legs thereof supported by
nate corners thereof and terminating in an apical point
all of said apical points being secured to said membrane
in a uniformly spaced pattern; said membrane having
a ?rst series of corrugations extending between the points
of said tripod components having the legs thereof sup
form pattern.
7. In a roof membrane sustained roof structure, a
of attachment of said membrane to said apical points of
unitary roof truss sustaining membrane constituting the
said truss system and a second series of corrugations ex
entire roof surface; said membrane being capable of re
sisting both tension and compression forces in all direc
tending at intersecting angles relative to laterally adjacent
ones of said ?rst corrugations and contained within areas
bounded by adjacent ones of said ?rst series of corruga
tions.
4. In a roof membrane sustained roof structure, a
tions in the plane in which it lies and serving, additionally,
as the top chord component of a co-extensive, underlying
truss system connected to said membrane at spaced points
throughout the area thereof; said truss system comprising
a plurality of rigid members connected together to form
unitary sheet metal membrane constituting the roof sur
a plurality of polygons disposed in a plane generally par
face, a co-extensive, underlying truss system connected to
said membrane at spaced points throughout the area 45 allel to and at a predetermined distance below the plane
of said membrane, and each of said polygons having a
thereof; said membrane, by reason of said connection,
plurality of rigid members similarly, convergingly rising
additionally serving as the top chord component of said
from the perimeter thereof and terminating in apical
truss system; said truss system comprising a plurality of
points rigidly secured to said membrane.
rigid members connected together to form a plurality of
hexagons disposed in a plane generally parallel to and at a
8. In a roof structure, a unitary rigid membrane capable
predetermined distance below the plane of said membrane
of resisting both tension and compression forces in the
and each of said hexagons having a series of three rigid
plane in which it lies and constituting both the roof sur
members similarly, convergingly rising from alternate
face and the top chord component of a co-extensive truss
corners thereof and terminating in an apical point all of
said apical points being secured to said membrane in a
system underlying and connected to said membrane at
spaced points throughout the area thereof; said truss sys
uniformly spaced pattern, and a rigid peripheral element
to which the periphery of said membrane and the portions
united to form a ?rst series of identical polygons each
of said hexagon forming rigid members constituting the
having a plurality of rigid members convergingly rising
periphery of said truss system are attached in said parallel
spaced relation; said membrane having a ?rst series of
therefrom to form an apical point; said points being con
nected to said membrane and serving to position said poly
gons in a plane parallel to and below said membrane,
means connecting said first series of polygons to each
other with resultant formation of a second series of iden
tical polygons disposed in the same plane as said ?rst
corrugations extending between the points of attachment
of said membrane to said apical points of said truss sys
tem and a second series of corrugations extending at in
tersecting angles relative to laterally adjacent ones of
tem comprising pluralities or rigid members integrally
said ?rst corrugations and contained Within area bounded 65 polygons, and other means forming apical points for said
by adjacent ones of said ?rst series of corrugations.
second series of said polygons attached to said membrane
5. In a roof membrane sustained roof structure, a
and positioning said second series of polygons in said
unitary rigid membrane capable of resisting both tension
plane of said ?rst series of polygons.
and compression forces in all directions in the plane in
9. A roof structure as claimed in claim 8,. including a
which said membrane lies constituting the roof surface 70 rigid peripheral member to which the periphery of said
and a co-extensive, underlying truss system connected to
membrane and those of said polygons disposed in vertical
said membrane at spaced points throughout the area there
alignment with said periphery of said membrane are at
tached in their respective parallel planes.
of; said membrane, by reason of said connection, addi
tionally serving as the top chord component of said truss
10. A roof structure as claimed in claim 8 in which
system; said truss system comprising a plurality of rigid 75 said membrane is provided with a ?rst series of corruga
3,083,793:
8
tionsextending between the-points of attachment of said
niembraneto said apical points of said polygons and a
second series of corrugations extending in directions inter
secting the angles between laterally adjacent‘ ones of said
series of- corrugations and contained within‘areas de?ned
by the, adjacent ends of said‘ ?rst series of corrugations.
References Cited'in the ?le of this patent
UNITED“ STATES, PATENTS
?rst series of corrugations and contained within areas
de?ned by the junctures of adjacent ones of said ?rst
series of. corrugations.
11. A roof structure as claimed in claim 9 in which
said membrane is provided with a ?rst series of corruga
2,371,421
2,406,863"
2,433,677'
tions extending between the points of attachment of said 10
2,590,227‘
2,682,235
second series of corrugations extending in directions in
tersecting the angles between adjacent ones of said ?rst
2,709,975‘
membrane to said apical points of said polygons and‘ a
Blaski _______________ __ Mar. 13,
Swann ________________ __ Sept. 3,
Thomas ______________ __ Dec. 30,
Bingham ____________ __ Mar. 25,
Fuller _______________ __V_ June 29,
Parker ________________ __ June 7,
1945
1946
1947‘
1952.
1954'
1955
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