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Патент USA US3094755

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June 25, 1963
Filed May 9, 1960
United States Patent 0
. ~ Patented'June 25, 1963
zontally outwardly projecting end ?anges 13 and an inter
mediate horizontal plate portion 14 arranged at the
elevation of the end ?anges. The truss further includes
Gerald J. Stout, 262 E. Irvin Ave., State College, Pa.
a pair of ?at horizontal bottom plate portions, or feet
Filed May 9, 1960, Ser. N . 27,956
4 Claims. (Cl. 20-6)
15, spaced intermediate the plate portion 14 and ?anges
13 and parallel thereto and below the latter. Diagonal
legs 16 interconnect the elements 13, 14 and 15, and are
preferably integral therewith as shown in FIG. 4. Up
wardly projecting parallel side ?anges 17 on the diagonal
This invention relates to ?oor construction for build
ings, and more particularly to a ?oor construction for
homes of the type having no basement.
10 legs 16 serve to render the legs more rigid so that the
An object of the invention is to provide highly simpli
truss is capable of supporting the maximum possible load.
?ed, compact and economical means for constructing
The legs 16 may also be stiffened by other suitable means
?oors above concrete base slabs in basementless homes
such as by ribbing or corrugating the same in a preferred
and utilizing the novel ?oor construction to facilitate the
installation in the home of a simpli?ed heating system.
Several of the trusses 12 are arranged below each ?oor
Another object of the invention is to provide a simpli
joist 11, as shown, and the joist may rest directly upon
?ed lightweight adjustable sheet metal support structure
the ?anges 13 and intermediate plate portion 14 and the
for ?oor joists and the like, and which structure is adapted
upper corners of ?anges 17 will serve to center the joist
to rest directly upon the concrete slab underlying the
11 upon the truss, as indicated in FIG. 3. The feet 15
?oor and compensating for the usual irregularities in the 20 of
the truss rest directly upon the concrete slab 10 and
concrete slab, so as to maintain the ?oor joists level.
A further object is to provide a floor construction of
are not secured to the slab by fastener means. The inter
generally level, but are commonly somewhat irregular
accordion-fashion prior to nailing the ?anges 13 to the
mediate plate portion 14 of the truss is likewise free of
the above mentioned character adapted to permit the free
positive attachment to the ?oor joist 11 and the latter
?ow of warm air in a relatively shallow plenum chamber
rests upon the plate portion 14 and the end ?anges 13 as
between the ?nished ?oor and concrete slab in all direc 25 stated. The end ?anges 13 are ?xedly secured to the bot
tions and substantially unobstructed.
tom of the joist 11 by means of nails 13', or like fasteners.
Still another object is to provide a ?oor construction
The arrangement is such that each W-shaped truss 12
of the above mentioned character which simpli?es the
is substantially self-adjusting to compensate for surface
installation of heating, plumbing and electrical equip
irregularities of the slab 10. That is to say, where the
ment and the like within the home, and renders the home 30 upper surface of the concrete slab 10 is irregular, one foot
less expensive to build and increases usable space within
15 of the truss may be at a different elevation from the
the home.
other foot 15 by as much as one-half to three-quarters of
Other objects and advantages of the invention will
an inch. When this condition prevails, the intermediate
be apparent during the course of the following description.
plate portion 14 is free to shift longitudinally of the joist
In the accompanying drawings, forming a part of this 35 11, FIG. 2, to the right or to the left so that the truss will
application, and in which like numerals are employed to
adjust itself automatically under load to compensate for
designate like parts throughout the same:
the difference in elevation of the truss feet’ 15. In FIG.
:FIG. 1 is a plan view, partly diagrammatic and partly
2, if the right hand foot is at an elevation above the left
in section, of a building embodying the ?oor construc
foot 15, due to a surface irregularity in the slab 10
tion according to the invention;
plate portion 14 will automatically adjust
FIG. 2 is an enlarged fragmentary vertical section
itself to the left along the joist 11. Likewise, if the left
taken on line 2-2 of FIG. 1;
hand truss foot 15 is elevated relative to the right hand
FIG. 3 is a similar section taken on line 3-3 of
truss foot, the'intermediate plate portion 14 will shift
FIG. 1; and
or slide somewhat to the right automatically to com
FIG. 4 is a perspective view of a ?oor support member 45 pensate for the difference in elevation between the truss
according to the invention.
feet. The legs 16 connected with the intermediate plate
In the drawings, wherein for the purpose of illustra
portion 14 will ?ex or bend at their junctions with the
tion is shown a preferred embodiment of the invention,
plate portion 14 and feet 15 to permit this automatic ad
the numeral 10 designates a concrete slab or base for a
justment. Additionally, at the time of installation, each
building of the type having no basement and adapted to
truss may have its overall height adjusted somewhat, if
rest directly upon the ground. Such concrete slabs are
necessary, by extending or foreshortening the entire truss
upon their upper faces and the slab may not present a
bottom of the joist. This is a means of assuring that the
truly level surface upon which to construct the ?nished
joists 11 are all mounted at a uniform elevation above the
?ooring of the building. .One important feature of the 55 slab 10. When the truss 12 is properly installed and the
invention is to utilize means in the construction of the
self-adjustment of the intermediate plate 14 has taken
?nished ?ooring which will compensate for the inherent
place, the bottom of the joist 11 will be ?rmly supported
irregularities in the concrete slab 10.
upon the ?anges 13 and intermediate plate portion 14 at
In constructing the ?oor upon the slab 10, a plurality
three points and both truss feet 15 will ?rmly engage the
of equidistantly-spaced parallel horizontal ?oor joists 11 60 top of the slab 11 whether the same is smooth and regu
are employed and these joists may be conveniently formed
lar or somewhat irregular, as the case may be.
from two-by-four lumber or the like. As indicated in
By this means all of the floor joists 11 may be in
the drawings, the floor joists 11 span the base slab 10
stalled in the desired spaced relation, and in a level man
transversely thereof in one direction.
ner, at the desired height, such as four or ?ve inches
In order to support the several joists at the same eleva 65 above the concrete slab 10. The rough flooring 17’ and
?nished ?ooring 17a, FIG. 1, may then be applied directly
tion, and in a level manner, preferably a few inches above
to the tops of the joists 11, in a conventional manner, to
the base slab 10, there is provided beneath each joist 11
complete the ?ooring of the building.
in the desired longitudinally spaced relation a plurality
The described ?oor construction readily enables the
of generally W-shaped sheet metal truss members 12,
to place plumbing pipes '18, electrical conduits
preferably formed of aluminum, steel, or the like.
19, and other such ?xtures, in the shallow chamber be
Each truss member 12 comprises a pair of top hori
tween the joists 11 and the base slab- 10, as indicated in
through bendable bight portions, said spaced end top
the drawings. This simpli?es the overall construction
supporting parts of each truss being fastened to the
‘bottom surface of the joist, each intermediate top sup
of the building; reduces the expense of plumbing, and.
utilities installation; and encourages the use of prefabri‘
porting part of each truss being slidably self-adjusting
longitudinally of the floor joist by bending of the bight
portions vunder load to compensate for surface irregu
cated plumbing systems, wiring and the like.
Additionally, the ?oor construction renders possible
the use in the building ‘of a simpli?ed heating system em
larities in said concrete base slab and diiferences in
bodying a down?ow warm air furnace 20 shown diagram
elevation of said bottom supporting parts caused by
matically in FIG. 1 and adapted to be installed in reg
said surface irregularities.
istration with a simple opening formed in the ?oor above
3. ‘In a floor ‘construction for a basementless building,
the slab 10 at one end of the building or room.
a concrete base slab, a plurality of spaced ?oor joists
is ‘discharged ‘from all sides of the furnace
spaced above said slab, and a plurality of sheet metal
20, at its bottom, as indicated by the arrows in FIG. 1,
trusses individually adjustable under load arranged be
and below the ?nished flooring, and this warm air is
tween each ?oor joist and ‘said slab in longitudinally
free to circulate in all directions in the shallow plenum
chamber between the ?nished ?ooring and the concrete 15 ‘spaced relation and engaging the slab and ?oor joist to
support thelatter, each truss being of zig-‘zag con?gura
slab 10, as should be'obvious. The trusses 12 being open
tion and including spaced end and intermediate top sup
in construction do not appreciably interfere with the
porting parts and spaced ‘bottom supporting parts, in
free circulation of warm air in all directions in the cham
clined leg portions respectively connecting said spaced
ber between the ?ooring and slab 10. The arrangement
bottom supporting parts with said spaced end and inter
affords a simpli?ed and inexpensive means to partially
mediate top supporting .parts through bendable bight
=heat the'building by radiant heat over the entire area of
portions, and means ‘for attaching the end top support
the ?oor'constructed upon the several joists 11.
‘ing parts only of each truss to the bottom of the floor
Additionally, warm air registers 21 of any conven
joist to allow longitudinal movement of said intermediate
tional type are installed at the ends or sides of the build
ing to convey a certa‘tin amount ofthe warm air up
top supporting part along'the ?oor joist by ?exure of the
bendable bight portions under load to adjust the eleva
“tion of the‘ spaced ibottorn supporting parts to compen
wardly into the space above the ?nished ?ooring to heat
such space by convection.
sate for surface irregularities of said base slab.
It is to be understood that the form of the invention,
4. A truss for use in ?oor construction comprising a
herewith shown and described, is to ‘be taken as a pre
ferred example of the same, and that various changes in 30 generally W-shaped 'body portion formed of relatively
thin sheet material, said body portion comprising a pair
the shape, size and arrangement of ‘parts may be resorted
of top substantially horizontal end ?anges adapted for
to without departing from the spirit of the invention or
attachment to the bottom of a ?oor joist and an inter
scope of the sub-‘joined claims.
mediate substantially horizontal plate portion arranged
Having thus described my invention, I claim:
'1. In a ?oor construction, a base slab having surface 35 vat the elevation of said end ?anges and slidably engage
able with the bottom of the joist and :free to shift some
irregularities, a plurality of spaced substantially parallel
?oor joists spaced above said slab for supporting ?oor
what lengthwise of the joist to render the truss self-ad
justing, substantially horizontal feet spaced below said
end ?anges and plate portion and intermediate the same
40 and adapted to rest freely upon a base slab, diagonal legs
vextending between said feet andfsaid end ?anges and in
‘mg, a plurality of generally W-s‘haped adjustable trusses ,
formed of sheet material interposed between each joist
and said slab in spaced relation longitudinally of the
joist and having spaced upper end portions and an inter
mediate ‘upper portion'engageable with the bottom of the
termediate plate portion, bendable bight portions con
_ "necting said diagonal legs with said feet and said end
joist and spaced bottom'feet freely engageableupon said
slab, means for attaching said upper end portions of the
?anges and intermediate plate portion for shifting said
intermediate plate portion to. compensate for a difference
in elevation between said feet, upwardly directed side
?anges on said diagonal legs to render the same rigid
and said side ?anges having corner portions projecting
'to ‘bend under load applied to. said end portions, whereby
upwardly above said top 'end ?anges and intermediate
said upper intermediate portion is free to shift auto
matically longitudinally of the joist in either direction 50 plate portion for centering ?oor joists which rest upon
truss to the joist, inclined leg portions respectively inter
connecting 'said feet with said end portions and inter
mediate upper portion through bight portions constructed
“said top end ?anges and plate portion.
to compensate for a difference in elevation between said
'truss feet caused by said surface irregularities.
2. In a ?oor construction ‘for a basementless building,
a concrete base slab, a plurality of spaced substantially
parallel horizontal ?oor joists spaced above said slab and 55
adapted to support ?ooring, and a plurality of adjustable
sheet metal trusses individual to each joist arranged be
tween each joist and said slab in spaced relation along a
the joist and having spaced end and intermediate top
supporting parts engaging the bottom surface of the joist
and spaced bottom supporting parts freely engaging said
slab, inclined leg portions respectively connecting said
spaced bottom supporting parts’with said end top sup
porting parts and said intermediate top supporting part
References Cited in the ?le of this patent
Whittaker ____________ __ Dec. 16,
Cinnamond __________ __ Sept. 14,
'Ragsdale ____________ __ June 28,
Braden _______________ __ Nov. 8,
Young ______________ __ Dec. 5,
Goodman ____________ .. Jan. 26,
Jolly _______________ __ May 23, 1950
O’Connor ____________ __ Nov. 6, 1951
Mayes ______________ __ Nov. 17, 1953
K-uhlm-an ____________ __ Feb. -1 8, 1958
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