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Патент USA US3039753

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June 19, 1962
Filed March 30, 1959
5 Sheets-Sheet 1
Guam/14o 0 14/ea/vca
June 19, 1962
Filed March 50, 1959
3 Sheets-Sheet 2
G/EOL A M0 D ?ea/v00
June 19, 1962
Filed March 30, 1959
3 Sheets-Sheet 3
G/eammo D MAMA/co
17% MM
United States Patent 0 " 1C6
Patented June 19, 1962
Girolamo D’Aronco, Via Duodo No. 34, Udine, Italy
Filed Mar. 30, 1959, Ser. No. 802,999
Claims priority, application Italy Mar. 30, 1958
8 Claims. (Cl. 256—13.1)
The present invention relates to a roadway guard rail
barrier which consists of pre-cast reinforced concrete
members, comprising elongated bodies and posts having
at least one bracket mounted thereon.
Said elongated bodies, which will be hereinafter re
ticularly in curves, are well known. They generally con~
sist of monolithic units, which are constructed in place,
or of units comprising pro-fabricated metallic members,
which are generally very expensive and which cannot al
ways be adapted to installations of every type.
It is well known that rein-forced concrete is weather
proof and is therefore very adaptable for external instal
lations. Till now the use of reinforced concrete for road
way guard rail barriers was considered dif?cult on ac
10 count of the fact that no su?iciently light members of
barriers are known so as to be able to manufacture them
in a building yard and transport them afterwards to a
ferred to as “barrier members,” may be of at least three
speci?c place on the roadway. Moreover said members
di?erent con?gurations.
would have to be able to be used for curves having very
A ?rst con?guration includes
elongated bodies having a constant cross area, said ?rst 15 di?'erent radius of curvature, that is-to-say vfor curves
bodies being used for the straightway sections of the guard
having 15 m. radius and more.
A further reason which has limited the utilisation of
rail barrier. A second con?guration of bodies have the
reinforced concrete is that fact that it is well known that
cross area increasing from the ends of each body toward
reinforced concrete has little resiliency to a head-on col
the center, while the third con?guration includes elon
gated bodies, the cross area of which increases from the 20 lision. But tests have proved that head-on collisions
against roadway guard rail barriers are exceptional and
center toward the ends. The barrier members of the sec
generally end in climbing of the barrier.
ond and third con?gurations will be used for the concave
Side-swipe collisions are on the contrary more fre
and convex sections respectively of curve guard rail bar
quent. For preventing damages from side-swipe colli
riers. The guard rail barrier of a roadway curve section
is thus formed by at least one polygonal or substantially 25 sions the following conditions have to be satis?ed:
( 1) Provide a guard rail barrier without projections or
polygonal curb having a number of sides at least twice
irregularities which could impede the forward motion of
higher than the number of the barrier members which has
a vehicle colliding with it.
been assembled for obtaining said curb. More than a
(2) The posts supporting the elongated bodies forming
curb may be provided for dangerous sections of the
30 the curb must be duly set back with regard to the front -
safely interlock the adjacent barrier members. For this
surface of said curb.
The invention provides a guard rail barrier which con
stitutes, when assembled, a monolithic unit which re
purpose in each bracket a supporting surface is provided
siliently absorbs the lateral component of the impact
The invention further provides posts supporting at
least one bracket, adapted to permit one to easily and
so formed as to partially house the ends of two adjacent 35 stresses of a vehicle in collision with the barrier, and
barrier members of said guard rail barrier curb. Said
supporting surface comprises a device for anchoring the
ends of the steel embedded bars of the precast concrete
members, said ends projecting for this purpose out of the
ends of said barrier members.
A still further object of the present invention is to
provide means for ?xing said posts to the road surface.
Said guard rail barrier when connected to the highway
pavement or ground therebeneath will be able to operate
in conjunction with the pavement so as to utilize the mass
of the highway pavement in opposition to a vehicle’s
lateral component of force in collision with the barrier.
The barrier members, the posts and their brackets
operates in conjunction with the supporting posts and
with barrier members which are placed in the area of the
collision. Said barrier members may be shaped as round
or polygonal bodies or the like.
The following speci?cation taken in conjunction with
the accompanying drawings discloses the invention more
FIG. 1 is a front view of a post, bracket and the adjacent
ends of two barrier members.
FIG. 2 is a side view of the post and bracket with
parts omitted.
FIG. 3 is a top plan view of FIG. 1.
FIGS. 4 to 7 are perspective views drawn to a reduced
scale of some forms of barrier members for external side
may ‘be cast in a building yard and then transported to
the place in which they have to be mounted, no special 50 barrier of roadway curves.
FIGS. 8 and 9 are perspective views drawn to a reduced
contractor’s ‘equipment being required on account of the
scale illustrating the modi?cation for internal side guard
fact that all the elements which will form the barrier
rail barriers of roadway curves.
are pre-cast in their de?nite form.
FIG. 10 is an elevational view drawn to a reduced scale
The guard rail barrier, which is the object of the present
invention, may be easily disassembled by substituting the
damaged members or by recovering their reinforcing ele
ments so as to use them again for an other installation.
For this purpose it will be su?icient to remove the mortar
which seals the junction area within the supporting sur
face in the brackets so as to disconnect the ends of the
steel bars of the reinforced concrete elongated bodies from
their anchoring device.
The present invention provides side roadway guard
rail barriers as well as center roadway guard rail barriers.
Said barriers ‘support the impact stresses produced by
55 of a guard rail barrier for the external side of a roadway
FIG. 11 is a top view drawn to a reduced scale of a
roadway section having side guard rail barriers.
The elements of the longitudinal curbs which are a part
‘of the guard rail barrier, are constituted by elongated
bodies, which may be grouped in three sets. The ?rst set
comprises barrier members having a constant cross area,
these members being used for straightaway sections of the a
said guard rail barrier, and are marked with 1 in FIGS.’
65 lO-ll, not being particularly illustrated as they do not
have ‘any particular feature.
a collision against them, distribute said stresses over a
The second and the third sets comprise members ‘for
fairly long length of the barrier and transform a part of
curve guard rail barriers and precisely the third set com- ,
said stresses into a lateral component which keeps the
prises members having the smallest cross-area in corre- ‘
vehicle in its proper lane.
70 spondence with their centre and the maximum cross area
Roadway guard rail barriers of different types for pre
at their ends; these members are used for guard rail bar
venting accidents caused by fast road tra?ic, more par
riers placed on the external side of roadway curves; the
housing bolts provided to be jam-locked to co-operating
second set comprises members having the maximum cross
areain correspondence with their centre and the smallest
slabs or plates secured to the roadway pavement. This
latter system may be used when the barrier has to be
cross area at their ends; these members ‘are used for guard
placed on stiif structures as for instance stone pavements,
metallic bridges or the like.
rail barriers which are installed along the internal side of
roadway curves.
The barrier members of FIGS. 4 to 6, 8 and 9 have
lateral round surfaces.
The barrier members 2 of FIG. 4 and 2a of FIG. 8
have surfaces shaped as two truncated cones having the
smaller and respectively the larger bases in common.
Referring to the modi?cation of FIG. 5, each barrier
Pins 10 may also be provided with resilient supporting
means so as to provide a resilient anchoring system for
the guard rail barrier members as they are mounted to
the posts 7; one or more brackets 9 may be supported
by each post 7 if the guard rail barrier has one or more
guard curbs.
Posts 7 may be also sufficiently high so as to support a
member is intended to form three consecutive sides of a
guard handrail 14 (FIG. 10). In this case the guard
guard rail barrier curb on account of the fact that it com
rail barrier curbs will be placed near the bottom of the
prises a central cylindrical intermediate part 3 between
two truncated cone-shaped ends 3a.
15 posts 7 and the guard handrail 14 at the right height
required by its function.
Referring to the modi?cations shown in FIGS. 6 and
FIG. 11 is a top plan view of a straightway section and
9, the surfaces of the members 4 and respectively 4a of the
of a curve section of a roadway on which is placed a
guard rail barrier are continuous and their axial sections
have respectively a convex and respectively ‘a concave
guardrail barrier in correspondence of the inside and
of the outside of the roadway.
What I claim is:
Member 5 of the guard ‘rail barrier illustrated in FIG.
7 is constituted by a prism-shaped body, its cross section
being polygonal and more particularly rectangular. The
members 1 to 5 which will form the curb of the guard
rail barrier” according to the present invention are made
with reinforced concrete, the steel bars 6 embedded therein
projecting from the ends of said members so that they form
hooks 6a to be anchored on the posts and interlocked
along with the hooks of the adjacent member within '
bracket 8.
1. A roadway guard rail barrier comprising at least
two posts, each post having a bracket mounted. thereon,
each bracket having top and bottom laterally offset por
tions forming a supporting surface for an anchoring pin,
a barrier member having at least one hook member in
each of its ends, each hook member engaging one of said
anchoring pins, said barrier member having a lateral sur
face facing a roadway, said lateral surface being sub
stantially equidistant along its. length from the center of
said roadway. '
The posts 7 have a round cross section, but they can be
2. A roadway guard rail barrier according to claim 1
also polygonal in cross section; Each post 7 has con
in which said barrier member has a constant cross area.
nected therein at least one bracket 8. The number of
3. A roadway guard rail barrier according to claim 1
brackets which are connected with each post bears a rela
tion to number of curbs to be provided in a guard rail 35 in'which said barrier member has a cross area which‘
increases from the center thereof toward its ends in a
concave manner.
The bracket S'is eccentric with regard to the axis of
4. A roadway guard rail barrier according to claim 1
post 7; a supporting surface 9 is provided in the project
in which said barrier member has a cross area which
ing part of the bracket. Supporting surface 9 is suited to
partially house the adjacent ends of two consecutive 40 increases from the ends. thereof toward its. center in a
members of the guard rail barrier, a part of the ends
thus projecting from said bracket 8 so that posts 7 never
come into contact with the vehicle which collides with
the guard rail barrier. The impact stresses are there
convex manner.
so shaped as to guide the vehicle into a better de?ec
least one bracket mounted on each post member to sup
5. A roadway guard rail barrier comprising at least
two elongated barrier members having center and end
portions, hook members projecting from the ends of said
fore directly distributed only over the guard curb which is 45 barrier members, at least three post members having at
port said barrier members, said bracket being eccentri
cally mounted on each post member and provided with
proper lane.
a supporting surface adapted to partially house and sup
The post 7 may project partially into the supporting
surface 9 so that the ends of the barrier members will be 50 port the ends of two adjacent elongated barrier members
so that each post member is set back with regard to the
in abutting relation therewith when they are connected
barrier formed by the associated elongated barrier mem
one with the other within supporting surface 9. In sup
bers to provide a substantially smooth and continuous
porting surface 9 there is provided an anchoring device
tion angle than the original ‘approach angle towards its
surface exterior of said bracket, and a removable anchor
to which the hooks 6a are locked which consists of a
pin inserted in coaxial slots 11 formed in the projecting 55 ing pin arranged in said supporting surface to anchor the
projecting hook members thereon.
?anges 8a of said bracket 8. Said pin 10 has an enlarged
6. A roadway guard rail barrier according to claim 5
head 10a and may be moved downwardly in the slots 11
in which at least one of said barrier members has a con
so as to be easily removed.
For a guard rail barrier having only one curb, one
post 7 more is needed than the, number of barrier mem
stant cross area.
7. A roadway guard rail barrier according'to claim 5
bers used to form the guard rail barrier.
The ends of two adjacent barrier members, shaped for
area which increases from the'center thereof toward its
instance as members 4, are anchored to the bracket of
ends in a concave manner.
in which at least one of said barrier members has a cross
8. A roadway guard rail barrier according to claim 5
each post 7, by inserting pin 10 downwards into the pro
jecting bent ends forming hooks 6a of the steel bars 6. 65 in which at least one of said barrier members has a cross
area which increases from the endsthereoftoward its
The joint area is then sealed by a sealing means 12,
center in a convex manner.
such as cement which will ?ll up the interstices between
the end of members 4 and the supporting surface 9.
References Cited in the ?le of this patent
The outside surface of the joint area must be smoothly
Posts 7 may have a point 7a (FIG. 10) so as to be
more easily driven into the ground; they may also have
McFall _______________ __ July 9, 1907
a foundation bracket 7b (FIG. 2) having holes 13 for
Buente ______________ __ Nov. 30, 1915
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