CA2372999A1 - Concrete form using face sheet as tension flange for stiffeners - Google Patents

Abstract

Metal concrete form panels having a face sheet to which is attached a rearwardly extended perimeter flange. Stiffeners on the back side of the face panel are to the back side of the face sheet and are arranged so that pressure on the first of the face sheet induces a tensile force in the face stunt.

Description

. ~ CA 02372999 2002-02-25 CONCRETE p'ORM US1.1~0 ~FAC~ SHEET '~~ISIOIY FLANGE FOR
1. Field of the Invention ~ I

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S The invention rala~tos generally to ~ ! >9 atrd, more specifically, etal co ! to a i .

metal concrete form penal which uses y~ ton a for the sue.
the l~o sheet as . !

2. Background of the Prior Art !' i Concrete forming apparatus is in . 'dc ~ truction of buildings, use in I bridgos, ~

and other concrete strueturvs. A coznmoln~i~~~ concrete structures systeul for f' uses a plurality of modular form components l assembled into a wide th~ are adaptoc~ ! variety of I~

configurations to conform to virtually renient. Such foaming and f amhitectur v; ~ apparatus ,:
compon~ts are typically made of metal, i tg enough to support that they ' !~rthe heavy weight of potuod concrete and durable r~~'~tc oa~n ba r~aused that the cord many .

., Cne of the most commonly used nfigurati n ch metal force cats ' .~ is a , flat panel that is used in forming ,. uxfaces, such ea walls, subs ' lly flat eo ~ .y~~

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foundations, pillars, and the like. SuchIi panels have a face corer ' ~ sheet which ie in contact with the coma being po . A ~t ~dod flange is secured rtarw aroutsd the paiuicter of tt~o fhco sheaf. A p1 a~~'stiera tied to the ~ ty of spaced . perimeter .
flange and tic rods or similar eomponart~~
s sera used tq~ flanges to tho flanges of tht wall panel on the opposite aide of the ~s wall ~ ' g formed. : f ~
the face shoat spans rib to rib, the welded stiffeners induce compression s ~ in the ~ ' particularly wbon a force is I~
exerted against the face sheet by the a . Yf th4: ' ession force is Large exwugh, the 1 ~
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, 'i face sheet will deflect betweenthe finishe: ~ ~ a will have a pillowed the ribs an appearance. Waters, external the like e;! to the back side of stiffeners ar the form ' ~ ~ I .
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panel is as effort to reduce ~ forces tire face panel and the compresai ind thereby ~

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reduce the likelihood that c use ' t>~eners is time cansuraing it will deflect. of ' and adds to the inventory of s: must : ~ ~ inventory. Further, farm component lx , they add to the weight of the fornts ~ nger, ~~sive tquiprnent to and so require move i around the canstructiQn site mom ~ .hilt to maneuver into and make the ' pla~:c by i WoIICCrS. i J I
~i In recent years, new, higher concrete i ~ationa have bees sttou introduced and a are becoming widely used ~ 'on ~ rate structures. Many its the conatruG of po ofthese ~I
new ca~ncrete formulations ~ than o ~l concrete formulations are less visco~ cony and they .

~i fond to take longer to cure. there cjusntity of uncurl, Accordingly is a liquid concrete that must be oontain~, during ~ ~ Theca is alga a by the ' . demand far concxete fornning systems thatlarger a ' ~f uacurod cotuxete.
can con ~ q For .

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5 example, over the past severalapacity far supplying cone has years, th. of ' !

ittuascd from SU cubic yards 1S0 cubic .for hour and form systems pa' hour that can i contain this larger volume ~ ceded.
of concrete ' .i i Thecae ie a need for metal farm. pare light in weight coacr~d ~ yet sufficio~atly , i ' strong to resist deflecting of conctat .. without the seed during form' ' . for the attachment of additional onions or exte:nal eti m~
' ~l The invention consist$ of a cotureto r~l having as increased rcsittaace to deaection at~d pillowiog wbca used to' twin and t ~~~ ncrate. The foriu panel comprises a 'i v.~ , I

t3~co sheet to the back of which are attachcc~ t least two ~ ~ apart transverse ribs and at least two spaced apart tie ribs. A rearwardly ek ded flange ~SS amend the perimeter of the fac$
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sheet. The ribs are spaced inside the perim ter flange ' nd the central portion of the fact I.I
sheet. Tie rods used to secure the form p ~ to other c ' ~ form components or supporting S structures are positioned adjacent the tie r~"~s. The . I g.~ 'bs eau continuously through the E , tie ribs so that vvhca unctu~ed concrete is ing ag ' sheet, the ribs distribute the r force to place the face sheet to always be ' ~ t~sion a~ !' s is eomp~sion ~d making it fully effective for calculating the cmss a~l pm , j 'the rl'bs. The fact sheet becomes I;
the tension flange for the welded ribs attd ti~'eners . ~ as as integral part of the form ..
patrol that resists binding forces of the e. Whil . ~ ~vcational form panel will be ~i speciHod far use at a given pressure, the ~ rm panel af: ~ t invcsltioa constructed ofthe same weight stool will be speei$ed and 'ce the ~ e~icn though weighing only approxixaately ten percent more thaw the ventioaai~ .~aaol.
i Au object of the presemt inveutiox3 is to provid ' I concr~o form panel that bas a I S fa~cc panel placed in tension to provide i ~ ' need res' ~ '' deflecting or pillowing .I
without the use of additional ax extexaal 'ag m .......,.
Another object of the iaventian f ~ to provide s ~ato foan compon~t that resists ..
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deflection and pillowing under load wi ~ ut subsiauti' tioasl weight or cost of manufachu~e, These and other objects of the in antian will ~ , ap~par~t to those skilled in tl~ art ..
upon a review and uxidorstaadiug of thin: ificatio t ,~~o 'end drawings, and t~ appaa~dod claims. 1 i I
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i ~ ~~n Fig. 1 is a perspective view of a m~ular cone ~ a ~; component of the present invention. [

Fig. 2 is crass-sactiat~ai view along line . Fig. 1.

Fig. 3 is an enlarged perspective ~ of a tie ~ 'ving channci and associated , apening in the face sheet of the form pane .

Fig. 4 is a plea view of a forte 1 of the ventiaat assembled with other conerate form components for the formic :of 1 section a'r-aha~

Fig. 5 is a schematic diag~rri she : ' g the ve farces induced on a face sheet co ~ of conventional form panels.

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Fig. 6 is a schematic diagram she ~ccs induces an a face sheet g the t of farm panels of the present invention.

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Referring to the drawings, there ' illustrated i ' 1, generally at 10, a metal ' ~ concrete fiostrr panel of the pre~amt invention. Tii. a face sheet 12 on its front farm panel, surface cad a ~arwardly axtetyded flange 14 extends perimeter of the face chest, including a pair of opQosing card rails 1 , ' of acing side rails 1$a and and 16b 18b.

The flange 14 is secured be the feet i2 by w or the lilac.

In the pte~cnd embodiment, a air of tic ti . ~~d 20b aactend between flat aide rails 18a and 18b and are sec~nwd by wddxn ~ to back or the ' side of the face ahem 12.
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plurality of cross ribs 22 are arranged ~ ~ o the back ' she f~aom sheet 12, axt~rded batweau the ;

end rails 1 4a and l bb. In the prefaxnd eunbodixnen'' ~ of the cross n'bos includes a central, i:

cross .rib section 24 and a sections ' 26b. The sections 24, pair of cross rib . 26a and .;

26b are sccvaed to the back sheet y ~~ ents or the like.
side of the face 12 b The tie ribs 20 are of a substantiall J a.nd ~ansverse cross section, ~ S-sb having a base leg 28 (S-shaped), a central ~ a ~ . 2). The tie ribs web 30 top ZO are secured to leg S the face sheet 12. The tie are ~ Rpaced apart relation ribs 20a and 2 ~. arrang oa either side of a central portion of the crass ' I substantially r-shaped fact shit 12. n'b in 7:

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traasvcrse cross-section, with ~ of ~n of the J being secured the end porn the to the back 1e side of the face sheet 12 and 3 exteu 1 to the face shoot 12.
the base of .

The form panels 10 are held ed apart. ' .
in a ~ to other coterie form compv~ne~ts to create a space in which ~ is a =' the section of concrete.
the fresh corer po Far example, in forming a wall r ~ a ~ 10 will be positioned section, a pai pf with their face the foxm sheets facing each othsyr sad a '' Ss of the wall being separated by desired formed. A
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concrete form assembly far ~ ' ~ is illustrated is Fig.
farruing a T ~ 4. A form panel pod wall , a 10 is assembled with a pair ; ~'ie rods 25 are used of corner fo assembli to assist in . ' holding the form panel 10 ~ ' t the corner form assemblies at the desired sitioa ' 23. Irv rel l i . ~ ~ ;nt where two adjacent coavontional form panels, the positional panels meet tie rods at oath other at the perimeter bung 'GIs flange. Ia f 10 of the present iave~ntion, the tie rods 25 $re positioned adjacent~ ~'tube 27 (Fig. 3) is waited the tie rt, 20. to the tie A

n'bs 20 in four symmetrically ~ ~~tic rod 25 will pass arranged 1 axiom 3rthrough the (Fi ..
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raeeiving tube 27, a corresponding29 ~hoet op in 12 (Fig.

3), atxi span the wail fencing space to be attached ~ ~'orna to ar~tha ~ponent assarnbly (Fig.

4).

When used in forming a centre '~ form ~ panels, vvhatber of th0 ooavantiozial type or of the .tier, i~iquid present inv the conerete is poured so that it is is .;

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contact with the front side of the facel.:concrete imposes a force shee of the pane on the face sheet that is in a gwrally normal ~pnal form pazieis, with lion. In th~'stiffeners secured to the perimeter flange, the t 1 '. s the face sheet force f the conere sa compassion, as illustrated in the sehernatie diagram Force of the coxtcreta of Fi 5. In con on the face sheet 12 of a foria panel 10 of the ~ tanailo oree in the present nvention in face shoot 12, as illusxrated in the schematic diagramf 12 thus forms an integral of ag. 6. The part of the structural components of the penal ~ t the fOTIp panel 10 10~ with the roe provides a much resistat~co to deflection or piU . g form panels.
than conv The form panals can be of any si ' desired the concrete foaming industry.
for In a praforred embodiment the form panel o are two tie ribs 20a 1Q~s 8 feet aqua end 20b that ;r~~-are spaced inwanlly of the end rails i ~, y, by one foot, t~
16a 16b, and ot~-balf inches. There are seven cross ribs 22, c fed in the middle of the o , o f which is form pattcl 10 midway of the side rails 18 and tba a ~~ arced equidistant of o fix of which tlu central cross rib 22, with three each on either side. ed of one-quarto inch . ~ ~r #ie ribs 20 thick ASTM

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A607 t~rada 50 steel, with the cantrai sae-qostfor inches long w ' 30 being sad the base leg one and oaahalf inches long. mach of atto-eigh~rs inch a cross rIb thick ASTM A570 Grade SO steal, with the section :: ant-quarter inches ' long sad tba base a:

section is cue and one-half inches long.; ' and tha face sheet 12 a rails 14 ere ma<1o of :.

one-quarter inch thick ASTM A607 50 to conventional panel steal. is sold under tha namo Plato Girders by 8p' ' fib Plate Girder will ~ vCorp. An deflect .036 inches betwcxn the ribs at the specified and ' ;from side to side or .194 i a total deflection .

of .x30 inches. A foam of the prat p ct loss than .125 inches still in most applications. The resulting form pantl I O i~ has twig a .' ted capacity of a comparablo conventfoual form with mughly one-Half ~ deflection ~ rily a tea paraant increase in woight, Although the invention has bean ribed with :t to a preferred tmbodimemt theaoof, it is to be also undamtaod that it is ~ t to be so i ' since cha~~,ges and modifications ~ can be made therein which ara within tha ~ 1 intended ~ :Qf this invention as dcf~od by the appended claims.
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Claims (7)

1. A metal concrete form panel, comprising:
(a) a face sheet;
(b) a flange extended rearwardly of the face sheet around the perimeter of the face sheet;
(c) a plurality of stiffeners extended between opposing portions of the flange and secured to the back of the face sheet and (d) the stiffeners are arranged around a central portion of the face sheet so that pressure on the front side of the face sheet induces a tensile force in the face sheet.

2. A metal concrete form panel as defined in claim 1 wherein said face sheet is rectangular.
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3. A metal concrete form panel as defined in claim 2 wherein said face sheet is square.

4. A metal concrete form panel as defined in claim 1, said stiffeners include at least a first pair of generally parallel, spaced-apart stiffeners.

5. A metal concrete form as defined in claim 4, wherein said stiffeners include at least a second pair of stiffeners transverse to the first pair of stiffeners.

6. A metal concrete form panel as defined in claim 1 wherein the cross section of the face sheet resists deflection substantially equally whit the cross section of the ribs.

7. A metal concrete form panel, comprising:
(a) a rectangular face sheet;
(b) a flange extended rearwardly of the face sheet around the perimeter of the face sheet;
(c) at least two spaced apart stiffeners transverse to a first pair of opposing sections of the flange and having opposite end portions secured to corresponding opposing section of the flange;
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(d) at least two spaced apart stiffeners transverse to a second pair of opposing sections of the flange and having opposite end portions secured to corresponding opposing section of the flange; and (e) the stiffeners are arranged around a central portion of the face sheet so that pressure on the front side of the face sheet induces a tensile force is the face sheet.