US1557759A - Crosswise-reenforced-concrete ribbed ceiling with hollow or light blocks - Google Patents

Description

Oct.

. M. GALKE 4 CI !OSSWISE REENFORCED CONCRETE RIBBED CEILING WITH HOLLOW OR LIGHT BLOCKS Filed Feb. 7, 4925 @dGddOOO QGOQQQ Q f Patented Oct. 20, 1925 UNITED "STATES.

PATENT. OFFICE.

MAX GALKE, or nrsnlvaon, GERMANY. f?

R0sswrsn-nnnnroncnn-concnnrn'nrnnnn'canine w rrrr HOLLOW OR- 'nrenr rocns.

Application filed February 7., i925. SerialNo. 71678;,

To all whom it may concern.

.Be it known that I, VNLXX GALKE, a citizen of the German Republic, residing at Eisen ach, Germany, have invented certain new and useful Improvements in Crosswise- Reenforcedfioncrete Ribbed Ceilings with Hollow or Light Blocks, for which I have filed an application in Germany, July 14, 1923, of whichth following is a specification.' a a The reenforced concrete ribbed ,ceiling formed by hollow blocks or light blocks is, according to the present invention, reenforced crosswise by special filling bodies (bricks) of convenient building naterial, of

tice-work compressing girder are in this case a substitute for the continuous concrete layer which has hitherto been arranged over the entire surface of the ceiling.

An embodiment of the invention is shown, byway of example, on the accompanying drawing, in which Fig. 1 1s a. longitudinal section through the improved ribbed celling on line AB of Fig. 2 is a plan view of the ceiling.

Fig. 3 shows on enlarged scale two filling bodies according to the invention limited liy stress ribs, in section on line C-D of lg. l. 4 V

Fi 4 shows on enlarged scale a plan View of a nlling body.

The ceiling is produced without sheeting upon poling boards 1 placed accurately horizontally. Upon the poling boards 1 the plates 2 are placed at such distances apart from one another that the longitudinal stress ribs 5 and the transverse stress ribs 6 required for the reception of the statically calculated iron insertions 3, 4 are obtained.

For the production of the transverse stress ribs 6 short laths 7 are nailed on the poling beards 1 and boards 8 are placed on these laths as moulds for the transverse stressribsl The'poling boardsl may be eventually sup-- ported icy-girders 9(Fig. 1)..

. The cavities 1 0 arranged in the upper surfaces of the bricks or filling bodies 2 are the essential featureiof 1 the invention, a, trellis work compression girder being formed by ramming or centring gravel concrete into said cavities.- Owing to the-formation of this lattice work compression girder by ramming or centring gravel concrete into the continuous cavities the continuous layer of concrete which, according to the building, regulations, have to be used for all ceilings of light concrete possessing low resisting'capability, is no longer necessary. The pro jections 11 formed by the net-like cavities must be of such dimensions and they must be spaced in such a manner that the lattice work concrete layer preserves the required static. effect as compression girdercfthe ceiling. 7 By the arrangement of; these ribbed compression girders 12, formed by the cavities} having rounded corners 13, the prescribed. concrete compression girder is, practically situated on the surface of the ceiling,

The-ribbed compression girders 12 have preferablyarches l t similar, to bridge girdthe stress ribs 5, 6 (F igs. 1 and 3); I The load'capability of this ceiling is very,

ers the sides. of which are inclined towards:

great as the ribbed compression girders are made at the same time'as the crossand longitudinal stress ribs 5, 6 so that the supporting parts are rigidly connected with one another and the ribs are solidly connectedwith the projections 11 of the bricks and consequently strengthened.

The stress ribs 5, 6 are preferably enlarged at the lower ends up to of their height (15 Fig. 3) in order to form an abutment for the four corners of each brick 2.

By the lattice work like arrangement of the ribbed compression girders 12 about 24, of the usual continuous concrete layer of at least 4: to 5 ems. thickness is economized. It is not to be overlooked that these concrete layers subsequently broughtonto the ceiling have practically no intimate connection with the ceiling proper.

Besides the economy of A, of the concrete material the casting and planishing of the ceiling are very simple as the surfaces of the projections 11 of the stones serve as a gauge.

sic

' fioor'boards'are-nailed. The thickness of the ceiling is-also reduced.

I claim -'1'. A crosswise reen'forced concrete ribbed ceiling comprising 1 in combination light filling bodies spacedto form continuous longitudinaland transverse intervals between the filling bodies, said intervalsstanding atright angles to one anothenprojections on the upper-surface of said *filling bodies, said projections havingapproximately the height of a' commonly used 'compression girder and being-spaced at regular intervals, reenforcing rods infthe -longitudinal and transverse intervals between-said filling bodies, and a concrete filling-of-the intervals both between said filling bo diestoform longitudinal and transverse stress ribs and between said proj'e'ctions of the filling bodies to form a continuous latticewor'klike compression girder of desired compressive or tensile strength situated in the surface of the ceiling.

2. A crosswise reenforced concrete ribbed ceiling comprisingin' combination light filling bodies havingeach; a curved upper surface and spaced to formcontinuous longitudinal andtransverseintervals between the filling "bodies, said intervals standing at right angles to one 2 another, projections on of-a commonly used compression girder and being spaced atregular intervals, reenforc ing rods in the longitudlnal and transverse intervals between said filling bodies, .and a concrete filling of the intervals both between said filling bodies to form longitudinal and transversestress ribs and between said projections of the filling bodies to form a continuous lattice work like compression girder of desired compressionor tensile strength situated in the'surface of the ceiling and having vaulted arch like lower surfaces between'and inclined towards said stress ribs.

8. A crosswise reenforced concrete ribbed ceiling comprising in combination light filling bodies having each a curved upper surface and inwardly inclined side walls and spaced to form continuous longitudinal and transverse intervals between the filling bodies, said intervals standing at right angles to oneanother, projections on the upper surface of said filling bodies,'-said projections having approximately the height of a commonly used compression girder andbeing spaced at regular intervals, reenforcing rods in the longitudinaland transverse intervals between said filling bodies, "and a concrete filling of the intervals both between said filling bodiesto form longitudinal and transverse stress ribs enlarged in the lower part toserveas abutments for the four corners of said filling bodies and between said projections of thefillingbodies to form acontinuous lattice work like compression girder-of desired compressiveor'tensile strength situated-in-the surface of the" ceiling and having vaulted archlike lower surfaces between and inclined-toward said stress ribs. In testimony whereof I afliX-my-signature.

MAX -GALKE.

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