US3763613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite concrete construction of two-way slabs and flat slabs
Assignee: Individual
•
Filing: 1970-01-14
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Granted: 1973-10-09
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Expires: 1990-01-14
Abstract
Abstract The present disclosure relates to a method and means of building two-way slabs and flat slabs, reinforced concrete floors and roofs employing composite concrete flexural construction which require little or no formwork, greatly reduce the use of temporary stringers and shores, increase the speed of construction, reduce the number of skilled workmen on the job and materially reduce the over-all cost of construction. The bottom layer of the composite concrete floor is formed by using a plurality of thin prefabricated concrete panels of considerable length and of a width in the neighborhood of around 8 feet or so, laid side by side in place on the job site with their ends resting on temporary or permanent supports. The panels are precast with one or more lattice-type girders or trusses extending lengthwise of each panel having their bottom chords firmly embedded in the panel and with the webbing and top chords extending above the top surface of the panel to afford reinforcement in a longitudinal direction from support to support. Transverse reinforcing of the panels is obtained by embedding a plurality of transversely disposed reinforcing rods or bars in the precast panels, the ends of said bars being formed with special upwardly extending return bend hooks which protrude above the upper surface of the panels along the marginal edges thereof, which are joined by the employment of a special splicing means to afford transverse reinforcement from panel to panel. The splice is completed and the transverse reinforcement obtained when the concrete topping applied on the site completely embeds the hooks, splicing link and trusses and has cured and set to form the composite concrete floor slab.
Inventors
- 👤 H Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:17
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/01; E04C5/06; E04C5/0627; E04B; E04B5/00; E04B5/16; E04B5/32; E04B5/36; E04B5/38
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
167 words
A composite concrete slab structure composed of a lower layer formed of a plurality of prefabricated two-way reinforced concrete panels arranged in abutting relation wherein said panels are provided with embedded transversely disposed reinforcement rods having their ends formed in upwardly disposed return bend hooks extending above the surface of the prefabricated panels with the hooks of one panel disposed oppositely to the hooks in the adjacent panel, a splicing link laid in place on the upper surface of said panels across the abutting edges and in close association with each pair of adjacently disposed hooks to form a reinforcing splice therewith and a poured in place concrete topping layer covering said prefabricated slabs and completing the composite concrete slab construction and entirely embedding the hooks and splicing links to complete the splice and provide adequate reinforcing in a transverse direction of said constructed composite slab by transferring tension forces in said rods to compression forces in said concrete to adequately prevent separation of said concrete layers.
Claim 2
Dependent Claim
167 words
A composite concrete slab structure composed of a lower layer formed of a plurality of prefabricated two-way reinforced concrete panels arranged in abutting relation wherein said panels are provided with embedded transversely disposed reinforcement rods having their ends formed in upwardly disposed return bend hooks extending above the surface of the prefabricated panels with the hooks of one panel disposed oppositely to the hooks in the adjacent panel, a splicing link laid in place on the upper surface of said panels across the abutting edges and in close association with each pair of adjacently disposed hooks to form a reinforcing splice therewith and a poured in place concrete topping layer covering said prefabricated slabs and completing the composite concrete slab construction and entirely embedding the hooks and splicing links to complete the splice and provide adequate reinforcing in a transverse direction of said constructed composite slab by transferring tension forces in said rods to compression forces in said concrete to adequately prevent separation of said concrete layers.
Claim 3
Dependent Claim
30 words
A composite concrete slab structure as defined in claim 1 wherein said splicing link comprises an elongated ring type link laid over each pair of oppositely disposed return bend hooks.
Claim 4
Dependent Claim
29 words
A composite concrete slab structure as defined in claim 1 wherein said splicing link comprises a straight splice rod laid adjacent each pair of oppositely disposed return bend hooks.
Claim 5
Dependent Claim
29 words
A composite concrete slab structure as defined in claim 1 wherein said splicing link comprises a hooked type splice link encompassing each pair of oppositely disposed return bend hooks.
Claim 6
Dependent Claim
29 words
A composite concrete slab structure as defined in claim 1 wherein said splicing link comprises a welded wire fabric link encompassing each pair of oppositely disposed return bend hooks.
Claim 7
Dependent Claim
38 words
A composite concrete slab structure as defined in claim 1 wherein said return bend hooks are disposed in a slightly staggered relation in adjacent panels and said splicing link comprises a lacing splice bar formed in serpentine form.
Claim 8
Dependent Claim
173 words
A reinforcing splice for the abutting lateral edges of two precast two-way reinforcEd panels which are to receive a top layer of poured concrete to form a two-way slab, said precast panels having embedded therein transverse reinforcing rods having their ends formed into reverse hook-like bends near the marginal edges of said panels with the reverse bend of said hooks extending upwardly above the surface of said panels, the hooks along the marginal edges of one panel being positioned opposite to the hooks in the adjacent panel, a splicing link placed upon the surface of the two adjacent panels over or adjacent to each pair of said oppositely disposed hooks, and a top layer of poured on the job concrete covering the precast panel and completely embedding the reverse hooks and associated splicing links to complete the reinforcing splice and provide adequate reinforcing in a transverse direction of said constructed composite slab by transferring tension forces in said rods to compression forces in said concrete to adequately prevent separation of said concrete layers.
Claim 9
Dependent Claim
173 words
A reinforcing splice for the abutting lateral edges of two precast two-way reinforcEd panels which are to receive a top layer of poured concrete to form a two-way slab, said precast panels having embedded therein transverse reinforcing rods having their ends formed into reverse hook-like bends near the marginal edges of said panels with the reverse bend of said hooks extending upwardly above the surface of said panels, the hooks along the marginal edges of one panel being positioned opposite to the hooks in the adjacent panel, a splicing link placed upon the surface of the two adjacent panels over or adjacent to each pair of said oppositely disposed hooks, and a top layer of poured on the job concrete covering the precast panel and completely embedding the reverse hooks and associated splicing links to complete the reinforcing splice and provide adequate reinforcing in a transverse direction of said constructed composite slab by transferring tension forces in said rods to compression forces in said concrete to adequately prevent separation of said concrete layers.
Claim 10
Dependent Claim
213 words
In a building structure in the course of erection, the combination therewith for support by permanent columns, of a composite concrete floor slab comprising a lower concrete layer formed of a plurality of thin precast concrete panels of considerable length and width and containing lengthwise and transverse reinforcing and laid in abutting relationship side by side with their ends resting on said permanent supports, the transverse reinforcing in said panels being formed of transversely disposed reinforcing bars embedded at spaced intervals therein and provided with return bend hook ends which protrude above the surface of said panels near the marginal side edges thereof, said hook ends being disposed in a definite predetermined relationship with respect to adjacent panels, a reinforcing splicing link laid on the surface of said panels across the abutting edges of two adjacent panels and closely encompassing said adjacently disposed hook ends of adjacent panels and an upper layer of poured on the site concrete covering the precast concrete panels and completely embedding the return bend hook ends and associated splicing links to complete the splice and provide adequate reinforcing in a transverse direction of said constructed composite slab by transferring tension forces in said rods to compression forces in said concrete to adequately prevent separation of said concrete layers.
Claim 11
Dependent Claim
213 words
In a building structure in the course of erection, the combination therewith for support by permanent columns, of a composite concrete floor slab comprising a lower concrete layer formed of a plurality of thin precast concrete panels of considerable length and width and containing lengthwise and transverse reinforcing and laid in abutting relationship side by side with their ends resting on said permanent supports, the transverse reinforcing in said panels being formed of transversely disposed reinforcing bars embedded at spaced intervals therein and provided with return bend hook ends which protrude above the surface of said panels near the marginal side edges thereof, said hook ends being disposed in a definite predetermined relationship with respect to adjacent panels, a reinforcing splicing link laid on the surface of said panels across the abutting edges of two adjacent panels and closely encompassing said adjacently disposed hook ends of adjacent panels and an upper layer of poured on the site concrete covering the precast concrete panels and completely embedding the return bend hook ends and associated splicing links to complete the splice and provide adequate reinforcing in a transverse direction of said constructed composite slab by transferring tension forces in said rods to compression forces in said concrete to adequately prevent separation of said concrete layers.
Claim 12
Independent Claim
231 words
The method of constructing a composite two-way girderless concrete slab or floor, comprising the steps of forming the permanent columns for the structure, positioning in abutting relationship a plurality of precast thin concrete panels with the short ends of said panels resting on said permanent columns, said panels being of the type having longitudinally extending trusses with their lower chords embedded in said panels to give reinforcing in a longitudinal direction of the panels and having transverse reinforcing hooked bars embedded at spaced intervals transversely along the length of said panels with the hooked ends extending above the surface of the panels in a reverse bend, laying in place upon the panel surfaces across the abutting edges of adjacent panels a splicing link in close association with each pair of oppositely disposed hooks of adjacent panels, using said precast panels as formwork and pouring therein a topping layer of concrete over the upper surfaces of said precast concrete panels to the desired depth to fully embed the longitudinally extending trusses and the hooked ends and associated splicing links and temporarily supporting said panels at spaced intervals along their length until the poured concrete has set and cured and provide adequate reinforcing in a transverse direction of said constructed composite slab by transferring tension forces in said rods to compression forces in said concrete to adequately prevent separation of said concrete layers.
Claim 13
Independent Claim
231 words
The method of constructing a composite two-way girderless concrete slab or floor, comprising the steps of forming the permanent columns for the structure, positioning in abutting relationship a plurality of precast thin concrete panels with the short ends of said panels resting on said permanent columns, said panels being of the type having longitudinally extending trusses with their lower chords embedded in said panels to give reinforcing in a longitudinal direction of the panels and having transverse reinforcing hooked bars embedded at spaced intervals transversely along the length of said panels with the hooked ends extending above the surface of the panels in a reverse bend, laying in place upon the panel surfaces across the abutting edges of adjacent panels a splicing link in close association with each pair of oppositely disposed hooks of adjacent panels, using said precast panels as formwork and pouring therein a topping layer of concrete over the upper surfaces of said precast concrete panels to the desired depth to fully embed the longitudinally extending trusses and the hooked ends and associated splicing links and temporarily supporting said panels at spaced intervals along their length until the poured concrete has set and cured and provide adequate reinforcing in a transverse direction of said constructed composite slab by transferring tension forces in said rods to compression forces in said concrete to adequately prevent separation of said concrete layers.
Claim 14
Dependent Claim
39 words
The method defined in claim 9, wherein service pipes and conduits for electricity, water, heating and cooling facilities for the structure beinG erected are positioned on top of the precast panels prior to pouring the topping layer of concrete.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |