CA1208029A

CA1208029A - Parking garage construction

Info

Publication number: CA1208029A
Application number: CA000460190A
Authority: CA
Inventors: Bruce Taylor
Original assignee: LAVALIN Inc
Current assignee: LAVALIN Inc
Priority date: 1984-08-01
Filing date: 1984-08-01
Publication date: 1986-07-22

Abstract

ABSTRACT

A parking garage having pre-cast portions has an external support wall surrounding an intermediate support wall which terminates short of the external wall. The intermediate support wall separates a number of ascending bays formed of slabs supported by the two walls. At each end of each bay a plurality of dihedral sections are positioned, each dihedral ection having a horizontal portion and an inclined portion. The free end of each horizontal portion rests on the external wall and the free end of each inclined portion is carried on a beam which spans the distance between the intermediate wall and the external wall.
The horizontal portions form an extension to the bay for turning purposes and the inclined portions form a ramp leading from the bay.

Description

~L2~B~9 ~IELD OF INVENTION
This invention relates -to pre-cas-t parking garages ~hich employ slightly inclined floors or bays for parking while circulation between the immediately adjacent bays is provided by an end cross ramp connec-ting the highest level of the lower bay with the lowes-t level of the adjacent upper bay. In such a construction, the inclination of each bay is kept to a minimum as parking places are provided across the slope and on each side of the circulation lane leading to the ramp.
PRIOR ART
The basic s-tructure of a well known type of pre-cast concrete garage consists of three lines of columns, spandrel beams spanning in line between the columns and dGuble tee members spanning between the spandrel beams.
The main floor slopes, ~r ~ys, are located across the double tee floor members. A special condition exist~ at the end interconnec-tion because the geometry calls for a slop-ing ramp disposed normally to the immediately adjacent floor slopes.
The framing of members at -the cross ramp employs intermediate walls on either side of t~e ramp running from the foundations up to the und~rside of the top floor. One of -the structural purposes of these walls is to pro~ide support to the double tee floor members in the ramp bays of the garage. This support is in the form of beams spanning between the ends of the walls. The main double tee floor members are cast, between six to eight at a time in long, steel, steam cured stressing beds and the double tee members used at the ramps are produced in the same way except that they are shor-ter in length.

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aU`~l?.~ Y O~ INVENTION
I-t is an object of the invention to simplify -the construction of the ramp in the garage construction described above and, in par-ticular, eliminate the framing of members at the cross ramp p~o~ y intermediate walls on either side of the ramp which run from the founda-tions up to the underside of the the top floor.
The parking ga~age o~ ~he invention is formed of pre-cast portions whichare arranged to provide an ex-ternal 10 support wall surrounding an intermediate support wall, the ends of which terminate short of the external support wall.
The intermediate support wall separates a plurali-ty of as-cending bays, each formed of slabs of double -tee~ section, supported adjacent their ends by the external and intermed-15 iate supportwalls~ Each ascending bay has an extension at each end ~lhich is substantially horizontal and each extension is connected to a ramp, one leading to the immediately ad-jacen~ bay above and the other to the immediately adjacent bay below.
It is a feature of the invention that the extension and the ramp are formed of cranked9 or dihedral sec-tions laid side by side and parall~l to the slab double tee members forming the bay. Each dihedral sec-tion has a horiz ontal portion and an integral inclined por-tion. An end wall is provided extending from the end of the in-termediate-support wall to -the external support wall. rrhe end of the horizon-tal portion is supported on the external support wall and the end of the inclined por-tion is supported on -the end wall;
in this manner, -the horizontal portions form the extension 3 and -the inclined portions form the ramp leading therefrom .
The dihedral sections are preferable of double ~IL2~

double tees i.e. wi-th a pair of downwardly depending ribs in order to provide the requisite beam s-treng-th. Hence, the inclined portion of the dihedral section will be inclined downwardly on the ramp leading from the lower end o~ -the parking bay but will be inclined upwardly at the o-ther end.
DESCRIPTION OF THE DRAWINGS
The invention will now be described in relation-ship to the accompanying drawings in which:
Figure 1 is a general perspective of part of a garage constructed according to a preferred embodiment of the invention:
Figure 2 is a section through a portion of a ramp constructed according to the embodiment shown in Figure 1;
Figure 3 is an exploded view of the assembly consti-tuting a bay;
Figure 4 is a view of one of the sections fo~mîng a bay and also a view of both forms of dihedral sections ~ used to construc-t -the extensions -to -the bay and the ramps leading therefrom;
Figure 5 is a plan view of a floor layout;
and Figure 6 is a section through the end support wall looking towards the ramp.
DESCRIPTION OF A PREFERRED EMBODI~ENT
i~ith reference to the drawings ih which, where applicablej like nuOmbers represent like par-ts, ver-tical columns 10 and spandrels 12 constitute an external suppor-t 3 wall generally denoted by -the numrral 14, see Figure 1.
As shown in Fi~lre 3, the spandrels 12 are carried on the columns 10 by integral abutments:16 ~ormed in the cas-ting process o~ making the colurnns 10. An in-termediate wall 18

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is shown in Figure 1 and it stops short of the external support wall for a purpose -to be explained later.
As shown in ~igures 1 and 5, slabs 20 are supported on the spandrels 12 of the external wall 14 at one end while the other end of the slabs 20 are supported on abutments to the intermedia-te wall 14. These slabs 20, laid side by side, constitute the parking bays, generally denoted by the numeral 22. The supporting abu-tments 16 and are stepped so that the slabs 20, in side by side location, provide a gentle slope necessary for each ba~ 22 -to provide for traffic circula-tion to the adjacent bay.
Each slab 20 has a pair of downwardly descending ribs 24, such slabs beîng known conventionally as double tee sections. The ribs 24 provide the beam strength necessary -to support the loading of the bays 22.
Referring again to Figure 1, each bay 22 has an extension 26 at each end which is substantially horizon-tal;
the extension 26 provides for turning of a vehicle from the bay 22. Each bay 22 has a sloping po~tion 28 which is integral with the extension 26 and provided as explained later. The sloping portion 28 of one bay f~rms a ramp, generally denoted by the numeral 30, with the adjacent sloping portion 28 of the next bay 2~.
It is ~ featureof -the invention that each extension 26 and -the integral sloping portion 28 are provided through dihedral sections shown in Figure 4 and designated 32 and 32a; ~he only di~ference between -the two sections shown is that one is used for a ~ownward ramp and the other for an upward ramp. Each dihedral section has an horizon-tal portion 34 and an inclined portion 36.
The dihedral sections are laid side by side, and ~Z~Z~3 substantially parallel to the slabs 20. Each dihedral section has an horizontal portion 34 and an inclined portion 36, as shown in Figure 4. The free end of each horizontal por-tion 34 is carried on -the spandrels which are horizontally disposed in contrast -to the spandrels 12 supporting the slabs 20. This provides for horizontal disposition of the extension 26 as a whole structure.
The free end of the inclined portion 36 is carried on an inverted tee beam which extends from -the intermediate wall 18 to the external support wall. 14: the inverted tee beam 38 is shown in section in Figure 2. The inclined portions 36 of each dihedral section in side by side relationship provide the integral sloping portions, and these, in end to end relationship provide a complete ramp between ad~acent bays 22.
The construction described solves the problems created by using end support walls which reduce the sight lines at the ends of previously constructed parking ga~ages.

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. A parking garage having precast portions comprising an external support wall surrounding an intermediate support wall which terminates short of said external support wall, said intermediate support wall separating a plurality of ascending parking bays each formed of slabs supported by said external and said inter-mediate wall in sloping relationship, a plurality of dihedral sections, laid side by side at each end of each bay and parallel to said slabs, each said dihedral section having a horizontal portion and an integral inclined portion, a beam extending from said intermediate wall for support on said external support wall, the free end of said hor-izontal portion being supported on said external support wall and the free end of said inclined portion being supported on said beam, said horizontal portions forming a substant-ially horizontal extension to said bay and said inclined portions forming a ramp therefrom, said slabs and said dihedral sections each having a downwardly depending pair of ribs to provide sufficient beam strength.

2. A parking garage according to Claim 1 wherein the ramp of one bay is in line with the ramp of the immediately adjacent ascending bay.