US3772835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Housing
Assignee: HB ZACHRY CO
•
Filing: 1971-10-21
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Granted: 1973-11-20
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Expires: 1991-10-21
Abstract
Abstract A pair of precast concrete building units are joined together to form a modular concrete house. Each concrete building unit includes a floor slab, upright load-bearing exterior walls joined with the perimeter of the floor slab, and a sloping roof cast integrally with the tops of the exterior walls. The building units are arranged so that the roof of each unit slopes upwardly toward the other unit, with the elevated ends of the roofs meeting to form an inverted V-shaped pitch roof. In one embodiment of the building unit, the elevated end portion of each roof projects outwardly to form a cantilevered overhang, with the cantilevered portions of two side-by-side building units covering an elongated corridor formed between the two units. An upright concrete shear panel covers each end of the corridor and rigidly connects the two building units together. Alternatively, the cantilevered overhang may be eliminated and two side-by-side units connected together without a central corridor or shear panels being present between them. Interior walls are cast integrally with the exterior walls and the roof to divide the building units into separate rooms. The bottoms of the interior walls are spaced above the floor slab so that no loads are transmitted to the floor slab by the walls, and plumbing and wiring are run through the space between the bottom of the interior walls and the floor slab. A reinforcing cage formed from welded wire mesh is embedded in each exterior wall. Insulation boards preferably made of plastic foam are placed inside each wire mesh cage and spaced longitudinally apart along the length of each wall, thereby forming spaced apart transverse concrete webs which join together opposite faces of the wall. A separate elongated longitudinal ridge extending along each longitudinal edge of the floor slab projects downwardly from the undersurface of the floor slab. Several parallel transverse ridges extend the width of the floor slab between the longitudinal ridges and project downwardly from the undersurface of the floor slab. A plurality of spaced apart downwardly opening notches are cast in the bottom edges of the transverse ridges to form shear keys which are embedded in the foundation to prevent movement of the floor slabs relative to each other or the foundation.
Inventors
- 👤 E Cox
- 👤 W Tiner
- 👤 R Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:43
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/348; E04B1/34815; E04B1/34823
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
277 words
A precast concrete building unit to be joined with a concrete foundation, the building unit including a floor slab having a pair of laterally spaced apart longitudinal edges intersected by a pair of longitudinally spaced apart lateral edges, one or more upright, load-bearing walls joined with the floor slab, a pair of laterally spaced apart elongated longitudinal beams cast integrally with and projecting downwardly from the undersurface of the floor slab, the longitudinal beams extending the length of the slab along the opposite longitudinal edges of the slab, a series of longitudinally spaced apart elongated transverse beams cast integrally with the floor slab to project downwardly from the undersurface of the floor slab and extend the width of the slab, a pair of said transverse beams extending along the opposite lateral edges of the floor slab, with one or more of said transverse beams being located intermediate the lateral edges of the slab, each transverse beam projecting downwardly a major portion of the height of the longitudinal beam so the longitudinal and transverse beams can be concurrently embedded in the foundation, a series of longitudinally spaced apart elongated transverse reinforcing ribs cast integrally with the floor slab to project downwardly from the undersurface of the floor slab by a distance less than the height of the transverse beams, the transverse ribs extending the width of the floor slab and being spaced between adjacent lateral beams of the floor slab to provide reinforcement for the slab, a separate elongated rigid reinforcing rod embedded in and extending the length of each transverse beam to provide reinforcement therefor and to be rigidly anchored to cooperating reinforcing means in the foundation.
Claim 2
Dependent Claim
277 words
A precast concrete building unit to be joined with a concrete foundation, the building unit including a floor slab having a pair of laterally spaced apart longitudinal edges intersected by a pair of longitudinally spaced apart lateral edges, one or more upright, load-bearing walls joined with the floor slab, a pair of laterally spaced apart elongated longitudinal beams cast integrally with and projecting downwardly from the undersurface of the floor slab, the longitudinal beams extending the length of the slab along the opposite longitudinal edges of the slab, a series of longitudinally spaced apart elongated transverse beams cast integrally with the floor slab to project downwardly from the undersurface of the floor slab and extend the width of the slab, a pair of said transverse beams extending along the opposite lateral edges of the floor slab, with one or more of said transverse beams being located intermediate the lateral edges of the slab, each transverse beam projecting downwardly a major portion of the height of the longitudinal beam so the longitudinal and transverse beams can be concurrently embedded in the foundation, a series of longitudinally spaced apart elongated transverse reinforcing ribs cast integrally with the floor slab to project downwardly from the undersurface of the floor slab by a distance less than the height of the transverse beams, the transverse ribs extending the width of the floor slab and being spaced between adjacent lateral beams of the floor slab to provide reinforcement for the slab, a separate elongated rigid reinforcing rod embedded in and extending the length of each transverse beam to provide reinforcement therefor and to be rigidly anchored to cooperating reinforcing means in the foundation.
Claim 3
Dependent Claim
35 words
Apparatus according to claim 1 including means forming an undulating undersurface of the transverse beams to prevent movement of the floor slab relative to the foundation when the transverse beams are embedded in the foundation.
Claim 4
Dependent Claim
69 words
Apparatus according to claim 2 including a concrete foundation slab below the floor slab, the foundation slab having undulating upper surface areas disposed below the undulating undersurfaces of the transverse beams, and grout between the transverse beams and the foundation slab, the transverse beams and foundation slabs providing vertically spaced apart undulating interfaces with the grout between them to prevent movement of the floor slab relative to the foundation.
Claim 5
Dependent Claim
32 words
Apparatus according to claim 1 in which the longitudinal beams project below the undersurface of the transverse beams to permit lifting devices or the like to be placed under the floor slab.
Claim 6
Dependent Claim
22 words
Apparatus according to claim 1 including an array of elongated rigid reinforcing rods embedded in the floor slab to provide reinforcement therefor.
Claim 7
Dependent Claim
64 words
Apparatus according to claim 5 including elongated rigid reinforcing rods embedded in the foundation slab to provide reinforcing therefor, a series of upright reinforcing rods embedded in each transverse beam and spaced apart along the length thereof, the upright reinforcing rods being rigidly secured to the reinforcing rods of the floor slab for providing an integral reinforcing structure for the floor slab and beams.
Claim 8
Dependent Claim
55 words
Apparatus according to claim 6 including a series of upright reinforcing rods embedded in each longitudinal beam and spaced apart along the length thereof, the upright reinforcing rods of the longitudinal beams being rigidly secured to the reinforcing rods of the floor slab to provide an integral reinforcing cage for the floor slab and beams.
Claim 9
Dependent Claim
42 words
Apparatus according to claim 7 including a separate upright load-bearing concrete wall joined with the top surface of the floor slab along each lateral edge thereof so the reinforced transverse beams can transmit the loads imposed by the walls to the foundation.
Claim 10
Dependent Claim
18 words
Apparatus according to claim 1 including elongated rigid reinforcing rods in the transverse ribs of the floor slab.
Claim 11
Dependent Claim
54 words
Apparatus according to claim 1 including a concrete foundation slab below the floor slab, elongated rigid reinforcing rods embedded in the foundation and disposed below the transverse beams of the floor slab, and rigid anchor means rigidly connected between the reinforcing rod of each transverse beam and a corresponding reinforcing rod in the foundation.
Claim 12
Dependent Claim
35 words
Apparatus according to claim 10 including means forming an undulating undersurface of the transverse beams to prevent movement of the floor slab relative to the foundation when the transverse beams are embedded in the foundation.
Claim 13
Dependent Claim
132 words
A building structure to be joined with a foundation, the building structure including a first precast concrete building unit including a floor slab, and one or more load-bearing walls joined with the floor slab; a second precast concrete building unit including a floor slab, and one or more load-bearing walls joined with the floor slab; means joining the first and second building units along a mutual interface to form a modular bUilding structure; a separate elongated transverse beam projecting downwardly from the undersurface of each floor slab along an axis transverse to the interface; and an undulating surface formed on the bottom of each transverse beam and extending along the length of the beam to prevent movement of the floor slabs relative to each other when they are embedded in the foundation.
Claim 14
Dependent Claim
132 words
A building structure to be joined with a foundation, the building structure including a first precast concrete building unit including a floor slab, and one or more load-bearing walls joined with the floor slab; a second precast concrete building unit including a floor slab, and one or more load-bearing walls joined with the floor slab; means joining the first and second building units along a mutual interface to form a modular bUilding structure; a separate elongated transverse beam projecting downwardly from the undersurface of each floor slab along an axis transverse to the interface; and an undulating surface formed on the bottom of each transverse beam and extending along the length of the beam to prevent movement of the floor slabs relative to each other when they are embedded in the foundation.
Claim 15
Dependent Claim
41 words
Apparatus according to claim 12 including a pair of said transverse beams projecting downwardly along opposite outer edges of the floor slab, and additionally including one or more of said transverse beams located intermediate the outer edges of the floor slab.
Claim 16
Dependent Claim
45 words
Apparatus according to claim 12 including a concrete foundation below the floor slab, the transverse beams being embedded in the foundation to form an undulating interface between the floor slab beams and the foundation to prevent movement of the floor slab relative to the foundation.
Claim 17
Dependent Claim
66 words
Apparatus according to claim 12 including a concrete foundation slab below the floor slab, means forming an undulating upper surface in the foundation slab below each transverse beam, and grout between each transverse beam and the foundation slab, each beam and the foundation slab forming vertically spaced apart undulating interfaces with the grout between them to prevent movement of the floor slabs relative to the foundation.
Claim 18
Dependent Claim
18 words
Apparatus according to claim 15 including a rigid anchor bar extending between each transverse beam and the foundation.
Claim 19
Dependent Claim
103 words
Apparatus according to claim 12 in which the floor slab has a pair of laterally spaced apart longitudinal edges intersected by a pair of longitudinally spaced apart lateral edges, in which the building units are connected along adjoining longitudinal edges, and further including a pair of laterally spaced apart longitudinal beams projecting downwardly from the undersurface of the floor slab along the longitudinal edges thereof, and in which a pair of said transverse beams extend downwardly along opposite lateral edges of the floor slab, and additionally including one or more of said transverse beams located intermediate the outer edges of the floor slab.
Claim 20
Dependent Claim
35 words
Apparatus according to claim 17 in which the transverse beams project downwardly a major portion of the height of the longitudinal beams so the longitudinal and transverse beams can be concurrently embedded in the foundation.
Claim 21
Dependent Claim
69 words
Apparatus according to claim 18 including a foundation slab below the floor slab, separate elongated rigid reinforcing bars in each transverse beam and extending the length of each beam, separate elongated rigid reinforcing bars embedded in the foundation and disposed below each reinforcing bar in the transverse beams, and separate rigid anchor means rigidly interconnecting the reinforcing bars of the transverse beams with the reinforcing bars of the foundation.
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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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |