US2058285A - Concrete building construction - Google Patents

Concrete building construction Download PDF

Info

Publication number
US2058285A
US2058285A US49608A US4960835A US2058285A US 2058285 A US2058285 A US 2058285A US 49608 A US49608 A US 49608A US 4960835 A US4960835 A US 4960835A US 2058285 A US2058285 A US 2058285A
Authority
US
United States
Prior art keywords
slabs
fillings
foundation
precast
concrete
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US49608A
Inventor
Amescua Heriberto
Original Assignee
Amescua Heriberto
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Amescua Heriberto filed Critical Amescua Heriberto
Priority to US49608A priority Critical patent/US2058285A/en
Application granted granted Critical
Publication of US2058285A publication Critical patent/US2058285A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/56Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
    • E04B2/64Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of concrete
    • E04B2/68Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of concrete made by filling-up wall cavities

Description

Oct. 20, 1936.

H. AMESCUA CONCRETE BUILDING CONSTRUCTION 3 Sheets-Sheet 1 iii 5' 562 20 Ana's Filed Nov. 13, 1955 cua,

INVENTOR ATTOR N EV Oct. 20, 1936. AMESCUA 2,058,285

CONCRETE BUILDING CONSTRUCTION Filed NOV. 15, 1935 5 Sheets-Sheet 2 ATTORNEY eriodqmesczzg BY Q Oct. 20, 1936. H AMESCUA CONCRETE BUILDING CONSTRUCTION Filed Nov. 15, 1955 s Sheets-Sheet s v/ 4 6W {W 6 M m a W w M .A i !1! WW WITNESS ATTORNEY Patented Oct. 20, 1936 UNITED STATES PATENT QFFlC-E 17 Claims.

The invention relates to a concrete building construction and more especially to a system of,

building construction using precast concrete units.

The primary object of the invention is the provision of a building construction of this character, wherein through the use of precast concrete units, these being in the form of slabs which by their shape and dimension under assembly form walls and roofs with air spaces and at the same time permit placement of reinforcing steel either plain or fabricated and the pouring of concrete to provide a continuously reinforced structure of any height and involving one or more stories.

Another object of the invention is the provision of a building construction of this character, wherein through the use of the precast units economy of material is assured and likewise labor, quickness of erection, fireproof and having a very low cost of maintenance, permitting the easy placement of a wall finish'like Celotex, sheet rock or similar material as a furring may be placed between the units and such material as just mentioned nailed thereon.

A further object of the invention is the provision of a building construction of this character, wherein a monolithic reinforced edifice is attained with a continuity of arrangement and with a thickness to such edifice in its walls and fiooring for sustaining loads or weights and in the erection eliminates any necessity for alteration in the slabs or units as to-the shape, weight and volume thereof.

A still further object of the invention is the provision of a building construction of this character, wherein monolithic characteristics thereof with a continued succession in erection and in the use of precast units or slabs, these in the assembly allow cavities for casting structural columns in the corners or unions of walls in their various distribution and such erection does not require skilled labor as the units or slabs can be quickly brought to place without much trouble and without using timber props at all.

A still further object of the invention is the provision of a building construction of this character, wherein there is involved refinements, over the subject matter of United States Letters Patent No. 2,001,696 issued May 21, 1935, the construction being reinforced and susceptible of withstanding weather changes, possessed of strength and durability and inexpensive to erect.

With these and other objects in view, the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawings, which disclose the preferred embodiment of the invention and pointed out in the claims hereunto appended.

In the accompanying drawings: 1 5 Figure 1 is a fragmentary perspective view of a concrete construction in accordance with the invention.

Figure 2 is a view similar to Figure 1 looking from the outside of the structure.

Figure 3 is a fragmentary perspective view of one of the slabs or units.

Figure 4 is a fragmentary enlarged horizontal sectional view through one of the walls of the structure.

Figure 5 is an edge view of a ceiling slab. Figure 6 is a fragmentary elevation at one of the joints of a vertical wall of the structure.

Figure 7 is a horizontal sectional view through one of the columns of the structure. 20

Figure 8 is a view similar to Figure '7 through another of the columns or the corner column. Similar reference characters indicate corresponding parts throughout the several views in the drawings. 25

Referring to the drawings in detail, the reinforced concrete construction comprises a foundation including the required number of precast horizontally arranged blocks III which when-end to end serve as beams or sills and are leveled and supported directly on the ground or' by means of a sub-base of any adequate material and the same may be rod reinforced. These sills or beams are joined in any suitable manner and being arranged with relation to each other according to the desired framing of an edifice.

Formed in the upper faces of the blocks I0 are channels or grooves H, the sides I2 being disposed in upwardly divergent relation to each other and into these channels or grooves II are fitted the lower ends of precast slabs or units l3 and I4, respectively, the latter forming themside wall while the former the outside wall of the edifice. These slabs or units l3 and M are similar to each other and have formed at their innermost faces substantially rectangular frame-like flanges IS with reversely beveled or angled faces 16 and I1, respectively, the flange l5 on each slab at one end of the latter being removed from that end next thereto to provide a beam recess l8. These slabs l3 and I4 are arranged side by side with the flanges l5 confronting each other, the latter being joined by a plastic bonding l9 and thus there is provided between said slabs an air chamber or space 20. The inner faces of the slabs l3 and M are formed with the longitudinal and transverse brace ribs 2| within the framelike flanges I5 while embedded in said slabsare longitudinal and transversely disposed reinforcing rods,22 and 23, respectively.

At a comer of an edifice and at a dividing wall as may be provided therein the slabs l3 and M in association with corner angle precast concrete pieces 24 and outside facing pieces 25, respectively, eifect spaces for the pouring of cementitious or concrete columns 26 and 21, respectively, these having embedded therein rod reinforcements 28, the reinforcements 28 extending longitudinally of such columns being extended into the sills or beams constituting the foundation l0 and such beams fit the reversely beveled sides l6 of the slabs l3 and M as is clearly shown in Figures '7 and 8 of the drawings.

The flanges l5 at the longitudinal sides of the slabs l3 and M are provided with holes or passages 29 for accommodating tie or anchoring elements 30, these being set in fillings 3| poured between the reversely beveled faces l6 of the side edges of said slabs l3 and I4 as is clearly shown in Figure4 of the drawings and such elements are loose within the passages of holes 29 so as to allow for expansion and contraction of the walls of the edifice according to the changes of weather elements.

The flanges I5 at the longitudinal sides of said slabs l3 and it have embedded therein rod re-.

inforcements 32 which extend into the recesses l8 and into these recesses is poured cementitious material or concrete to provide horizontal beams 33, the latter also being provided with metallic reinforcements 34.

Corelated with the walls constituted by the slabs l3 and H are the precast concrete ceiling and fioor slabs 35 and 36, respectively. The cellto constitute the walls, both outside and dividing walls, are joined with the sills in the grooves or channels II with cementitious fillings 43 located between-the sides 12 andthe outer faces of said slabs l3 and M, respectively.

The fillings 3| carry reinforcing rods 44 which may continue throughout such fillings in a ver ticaldirection between the inner and outer slabs l3 and I4.

Under the construction described there is obtained a truly monolithic edifice of fully reinforced concrete, the reinforcenients of which is continuous notwithstanding the fact that there is used the precast slabs or units in the erection of the edifice. The embedded reinforcements in the respective fillings and beams will project into the columns and thus the entire edifice is unitary, the slabs 36 being also serviceable as roofing.

What is claimed is:

1. In a building construction of the kind dscribed, a precast concrete foundation having channeled upper sides, precast concrete inner and outer wall slabs fitting the channeled upper side of said foundation and having inner surface formations matching each other to form air spaces between said slabs, fillings between the edges adjacent to each other of said slabs and anchoring elements loosely fitting said slabs and embedded in said fillings.

2. In a building construction of the kind described, a precast concrete foundation having channeled upper sides, precast concrete inner and outer wall slabs fitting the channeled upper side of said foundation and having inner surface formations matching each other to form air spaces between said slabs, fillings between the edges adjacent to each other of saidslabs and anchoring elementsloosely fitting said slabs and embedded in'said fillings, the edges next to each other of the slabs being reversely beveled and confronting said fillings.

3. In a building construction of the kind described, a precast concrete foundation having channeled upper sides, precast concrete inner and outer wall slabs fitting the channeled upper side of said foundation and having inner surface formations matching each other to' form air spaces between said slabs, fillings between the edges adjacent to each other of said slabs, anchoring elements loosely fitting saidslabs and embedded in said fillings, the edges next to each other of the slabs being reverselyabeveled and confronting said fillings,- angled corner pieces associated with said slabs and poured concrete columns between the angled pieces and the edges adjacent thereto of said slabs.

4. In a building construction of the kind described, a precast concrete foundation having channeled upper sides, precast concrete inner and outer wall slabs fitting the channeled upper side of said foundation and having inner surface formations matching each other to form air spaces between said slabs, fillings between the edges adjacent to each other of said slabs, anchoring elements loosely fitting said slabs and embedded in said fillings, the edges next to each other of the slabs being reversely beveled and confronting said fillings, angled corner pieces associated with said slabs, poured concrete columns between the angled pieces and the edges adjacent thereto; of said slabs, the slabs being formed with horizontal beam recesses and poured concrete beams filling said recesses.

5. In a building construction of the kind described, a precast concrete foundation having channeled upper sides, precast concrete inner and outer wall slabs fitting the channeled upper sideof said foundation and having inner surface formations matching each other to form air spaces between said slabs, fillings between the edges adjacent to each other of said slabs, anchoringelements loosely fitting said slabs and embedded in said fillings, the edges next to each other of the slabs being reversely beveled and confronting said fillings, angled corner pieces associated with said slabs, poured concrete columns between the angled pieces and the edges adjacent thereto of said slabs, the slabs being formed with horizontal beam recesses, poured concrete beams filling-said recesses and metallic reinforcements in the slabs,

in said fillings, the edges next to each other of the slabs being reversely beveledand confronting said fillings, angled comer pieces associated with said slabs, poured concrete columns between the angled pieces and the edges adjacent thereto of said slabs, the slabs being formed with horizontal beam recesses, poured concrete beams filling said recesses, metallic reinforcements in the slabs, columns and beams and ceiling and floor slabs associated with said first-mentioned slabs and beams.

7. In a building construction of the kind described, a precast concrete foundation having channeled upper sides, precast concrete inner and outer wall slabs fitting the channeled upper side of said foundation and having inner surface formations matching each other to form air spaces between said slabs, fillings between the edges adjacent to each other of said slabs, anchoring elements loosely fitting said slabs and embedded in said fillings, the edges next to each other of the slabs being reversely beveled and confronting said fillings, angled corner pieces associated with said slabs, poured concrete columns between the angled pieces and the edges adjacent thereto of said slabs, the slabs being formed with horizontal beam recesses, poured concrete beams filling said recesses, metallic reinforcements in the slabs, columns and beams, ceiling and fioor slabs associated with said first-mentioned slabs and beams and fillings between said last-mentioned slabs.

8. In a building construction of the kind described, a precast concrete foundation having channeled upper sides, precast concrete inner and outer wall slabs fitting the channeled upper side of said foundation and having inner surface formations matching each other to form air spaces between said slabs, fillings between the edges adjacent to each other of said slabs, anchoring elements loosely fitting said slabs and embedded in said fillings, the edges next to each other of the slabs being reversely beveled and confronting said fillings, angled corner pieces associated with said slabs, poured concrete columns between the angled pieces and the edges adjacent thereto of said slabs, the slabs being formed with horizontal beam recesses, poured concrete beams filling said recesses, metallic reinforcements in the slabs, columns and beams, ceiling and floor slabs associated with said first-mentioned slabs and beams, fillings between said last-mentioned slabs and rib formations on the last-mentioned slabs and confronting each other to form spaces therebetween.

9. In a building construction of the kind described, a precast concrete foundation having channeled upper sides, precast concrete inner and outer wall slabs fitting the channeled upper side of said foundation and having inner surface formations matching each other to form air spaces between said slabs, fillings between the edges adjacent to each other of said slabs, anchoring elements loosely fitting said slabs and embedded in said fillings, the edges next to each other of the slabs being reversely beveled and confronting said fillings, angled corner pieces associated with said slabs, poured concrete columns between the angled pieces and the edges adjacent thereto of said slabs, the slabs being formed with horizontal beam recesses, poured concrete beams filling said recesses, metallic reinforcements in the slabs, columns and beams, ceiling and fioor slabs associated with said first-mentioned slabs and beams, fillings between said last-mentioned slabs, rib formations on the last-mentioned slabs and confronting each other to form spaces therebetween and fillings joining the first-mentioned slabs with the foundation. j

10. In a building construction of the kind described, 'a precast concrete foundation having channeled upper sides, precast concrete inner and outer wall slabs fitting the channeled upper side of said foundation and having inner surface formations matching each otherto form airspaces between said slabs, fillings between the edges adjacent to each other of said slabs, anchoring elements loosely fitting said slabs and embedded in said fillings, the edges next to each other of the slabs being reversely beveled and confronting said fillings, angled corner pieces associated with said slabs, poured concrete columns between the angled pieces and the edges adjacent thereto of said slabs, the slabs being formed with horizontal beam recesses, poured concrete beams filling said recesses, metallic reinforcements in the slabs, columns and beams, ceiling and fioor slabs associated with said first-mentioned slabs and beams, fillings between said last-mentioned slabs, rib formations on the last-mentioned slabs and confronting each other to form spaces therebetween, fillings joining the first-mentioned slabs with the foundation and reinforcements embedded in the fillings between the edges adjacent to each other of the first-mentioned slabs.

11. A construction of the character described comprising a precast foundation, opposed vertical precast slabs seated in the foundationedgetoedge and spaced from each other to form a hollow wall, matched marginal projections on the slabs and meeting each other to provide dead air spaces in the hollow wall, the faces of the projections at the meeting edges of the opposed slabs being reversely beveled to provide columnar filling spaces therebetween, and poured cement fillings within said spaces and interlocked with the projections for'efiecting' sealing joints between the slabs and between the dead air spaces.

12. A construction of the character described comprising a precast foundation, opposed vertical precast slabs seated in the foundation edge slabs being reversely beveled to provide columnar filling spaces therebetween, poured cement fiil ings within said spaces and interlocked with the projections for effecting sealing joints between the slabs and between the dead air spaces, and anchoring elements fitting the projections of opposed slabs for connecting together the said opposed slabs.

13. A. construction of the character described comprising a precast foundation, opposed vertical precast slabs seated in the foundation edge to edge and spaced from each other to form a hollow wall, matched marginal projections on the slabs and meeting each other to provide dead air spaces in the hollow wall, the faces of the projections at the meeting edges of the opposed slabs being reversely beveled to provide columnar filling spaces therebetween, poured cement fillings within said spaces and interlocked with the projections for effecting sealing joints between the slabs and between the dead air spaces, and anchoring elements fitting the projections of opposed slabs for connecting together the said opposed slabs and embedded in the fillings.

14. A construction of the character described comprising a precast foundation, opposed vertical precast slabs seated in the foundation edge to edge and spaced from each other toform a hollow wall, matched marginal projections on the slabs and meeting each other to provide dead air spaces in the hollow wall, the faces of the projections at the meeting edges of the opposed slabs being reversely beveled to provide columnar filling spaces therebetween, poured cement fillings within said spaces and interlocked with the projections for effecting sealing joints between the slabs and between the dead air spaces, anchoring elements fitting the projections of opposed slabs for connecting together the said opposed slabs and embedded in the fillings, and metallic reinforcements embedded in said slabs.

15. A construction of the character described comprising a precast foundation, opposed vertical precast slabs seated in the foundation edge to edge and spaced from each other to form a hollow wall, matched marginal projections on the slabs and meeting each other to provide dead air spaces in the hollow wall, the faces ofthe projections at the meeting edges of the opposed slabs being reversely beveled to provide columnar filling spaces therebetween, poured cement fillings within said spaces and interlocked with the projections for effecting sealing joints between the slabs and between the dead air spaces, anchoring elements fitting the projections. of opposed slabs for connecting together the said opposed slabs and embedded in the fillings, metallic reinforcements embedded in said slabs, and metallic reinforcements in said fillings. I

16. A construction of the character described comprising a precast foundation, opposed vertical precast slabs seated in the foundation edge to edge and spaced from each other to form a hollow wall, matched marginal projections on the slabs and meeting each other to provide dead air ments in said fillings, and precast facing pieces seated by the fillings for closing the joints between the slabs at the outer faces of the latter.

17. A construction of the character described comprising a precast foundation, opposed vertical precast slabs seated in the foundation edge to edge and spaced from each other to form a hollowwwall, matched marginal projections on the slabs and meeting each other to provide dead air spaces in the hollow wall, the faces of the projections at the meeting edges of the opposed slabsbeing reversely beveled to provide columnar filling spaces therebetween, poured cement fillings within said spaces and interlocked with the projections for effecting sealing joints between the slabs and between the dead air spaces, anchoring elements fitting the projections of opposed slabs for connecting together the said opposed slabs and embedded in the fillings, metallic reinforcementsembedded in said slabs, metallic reinforcements in said fillings, precast facing pieces seated by the fillings for closing the joints between the slabs at the outer faces of the latter, the slabs being formed with horizontal beam recesses, and poured concrete beams filling said recesses.

HERIBERTO AMESCUA.

US49608A 1935-11-13 1935-11-13 Concrete building construction Expired - Lifetime US2058285A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US49608A US2058285A (en) 1935-11-13 1935-11-13 Concrete building construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US49608A US2058285A (en) 1935-11-13 1935-11-13 Concrete building construction

Publications (1)

Publication Number Publication Date
US2058285A true US2058285A (en) 1936-10-20

Family

ID=21960726

Family Applications (1)

Application Number Title Priority Date Filing Date
US49608A Expired - Lifetime US2058285A (en) 1935-11-13 1935-11-13 Concrete building construction

Country Status (1)

Country Link
US (1) US2058285A (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695159A (en) * 1952-12-15 1954-11-23 Bridwell Gail Laurence Precast fence
US2769332A (en) * 1950-12-18 1956-11-06 Jr Charles Kepler Brown Preformed slab and shell construction
US2940294A (en) * 1955-05-02 1960-06-14 John A Carlson Building construction
US2950786A (en) * 1954-01-27 1960-08-30 Markle Lafayette Building system
US3149437A (en) * 1958-09-16 1964-09-22 Wheeler-Nicholson Malcolm Building construction
US3218774A (en) * 1961-09-28 1965-11-23 Mcniel Construction Co Hollow reinforced concrete building panel
US3600862A (en) * 1969-12-08 1971-08-24 Kirchhoff Ernst Procedure and precast building elements made of concrete or reinforced concrete for the construction of buildings or skeletons
US3834094A (en) * 1973-09-12 1974-09-10 B Ferguson Track system wall assembly for houses or the like
US3890748A (en) * 1973-06-13 1975-06-24 Miroslav Fencl Structure of coordinated modular building construction
US4004385A (en) * 1973-04-17 1977-01-25 Momotoshi Kosuge Building structure using concrete blocks
US4127971A (en) * 1977-05-16 1978-12-05 Rojo Jr Agustin Building constructed of precast L-shaped concrete units
US4703599A (en) * 1985-09-03 1987-11-03 National Concrete Masonry Association Concrete masonry footer block foundation system and blocks therefor
US4798036A (en) * 1985-09-03 1989-01-17 National Concrete Masonry Association Concrete masonry footer block foundation system and blocks therefor
US5865001A (en) * 1997-02-21 1999-02-02 We-Mar, Inc. Prefabricated wall panels connecting system
US6003278A (en) * 1997-12-11 1999-12-21 We-Mar, Inc. Monolithic stud form for concrete wall production
US6338231B1 (en) * 2000-03-13 2002-01-15 Fast Built Panels, Inc. Prefabricated concrete wall panel system and method
US8499522B1 (en) * 2004-03-31 2013-08-06 E. Dillon & Company Lightweight concrete masonry veneer unit

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2769332A (en) * 1950-12-18 1956-11-06 Jr Charles Kepler Brown Preformed slab and shell construction
US2695159A (en) * 1952-12-15 1954-11-23 Bridwell Gail Laurence Precast fence
US2950786A (en) * 1954-01-27 1960-08-30 Markle Lafayette Building system
US2940294A (en) * 1955-05-02 1960-06-14 John A Carlson Building construction
US3149437A (en) * 1958-09-16 1964-09-22 Wheeler-Nicholson Malcolm Building construction
US3218774A (en) * 1961-09-28 1965-11-23 Mcniel Construction Co Hollow reinforced concrete building panel
US3600862A (en) * 1969-12-08 1971-08-24 Kirchhoff Ernst Procedure and precast building elements made of concrete or reinforced concrete for the construction of buildings or skeletons
US4004385A (en) * 1973-04-17 1977-01-25 Momotoshi Kosuge Building structure using concrete blocks
US3890748A (en) * 1973-06-13 1975-06-24 Miroslav Fencl Structure of coordinated modular building construction
US3834094A (en) * 1973-09-12 1974-09-10 B Ferguson Track system wall assembly for houses or the like
US4127971A (en) * 1977-05-16 1978-12-05 Rojo Jr Agustin Building constructed of precast L-shaped concrete units
US4703599A (en) * 1985-09-03 1987-11-03 National Concrete Masonry Association Concrete masonry footer block foundation system and blocks therefor
US4798036A (en) * 1985-09-03 1989-01-17 National Concrete Masonry Association Concrete masonry footer block foundation system and blocks therefor
US5865001A (en) * 1997-02-21 1999-02-02 We-Mar, Inc. Prefabricated wall panels connecting system
US6151843A (en) * 1997-02-21 2000-11-28 We-Mar, Inc. Prefabricated wall panels connecting system
US6003278A (en) * 1997-12-11 1999-12-21 We-Mar, Inc. Monolithic stud form for concrete wall production
US6338231B1 (en) * 2000-03-13 2002-01-15 Fast Built Panels, Inc. Prefabricated concrete wall panel system and method
US8499522B1 (en) * 2004-03-31 2013-08-06 E. Dillon & Company Lightweight concrete masonry veneer unit

Similar Documents

Publication Publication Date Title
US9371648B1 (en) Concrete building structure and method for modular construction of same
US6401417B1 (en) Concrete form structure
US3788020A (en) Foamed plastic concrete form with fire resistant tension member
US3184893A (en) Contact foundation method
US3292331A (en) Interlocking blocks and wall construction
US2497887A (en) Paneled building construction
US2920475A (en) Building panel
US3216163A (en) Integrated building framing and floor therefor
US3238684A (en) Reinforcement and shuttering assembly for concrete
US4454702A (en) Building construction and method of constructing same
US3724141A (en) Modular units, buildings and systems
US4290246A (en) Multi-purpose precast concrete panels, and methods of constructing concrete structures employing the same
US7185467B2 (en) Modular system of permanent forms for casting reinforced concrete buildings on site
US1095204A (en) Concrete floor and ceiling.
US6301851B1 (en) Apparatus and method for forming precast modular units and method for constructing precast modular structure
US5987827A (en) Concrete building construction and method
US6658799B1 (en) Volumetric modular building system
US5065558A (en) Prefabricated modular building construction system
US3495371A (en) Prefabricated concrete structure
US3645056A (en) Connecting horizontal panels and vertical panels in prefabricated buildings
US4727701A (en) Building panel
US3300943A (en) Building system
US7121061B2 (en) Reinforced concrete building system
US10094101B1 (en) Precast concrete system with rapid assembly formwork
US3845594A (en) Steel joist or composite steel and concrete construction