What is claimed is:
1. An apparatus for alarming decrease in tire air-pressure based on rotational information obtained from tires attached to a four-wheeled vehicle, comprising: a rotational information detecting means for detecting rotational information of each tire; a steering angle detecting means for detecting a steering angle; a memory means for storing the rotational information of each tire and the steering angle; a turning radius calculating and processing means for calculating a turning radius based on the rotational information of each tire; a judged value calculating and processing means for calculating a judged value based on the rotational information of each tire; and a correction means for correcting the turning radius in case it has been determined by the steering angle detecting means that the vehicle is in a straight-ahead driving condition though the driving condition of the vehicle is a turning condition when being based on the turning radius obtained on the basis of the rotational information.
2. An apparatus for alarming decrease in tire air-pressure based on rotational information obtained from tires attached to a four-wheeled vehicle, comprising: a rotational information detecting means for detecting rotational information of each tire; a steering angle detecting means for detecting a steering angle; a memory means for storing the rotational information of each tire and the steering angle; a turning radius calculating and processing means for calculating a turning radius based on the rotational information of each tire; a correction means for correcting the turning radius in case it has been determined by the steering angle detecting means that the vehicle is in a straight-ahead driving condition though the driving condition of the vehicle is a turning condition when being based on the turning radius obtained on the basis of the rotational information; and a decompression determining means for determining a decompressed condition of a tire in case a correction coefficient for the turning radius as obtained by the correction means is not less than a threshold.
3. The apparatus of claim 2, wherein the threshold is an integrated value in a predetermined time.
4. A method for alarming decrease in tire air-pressure based on rotational information obtained from tires attached to a four-wheeled vehicle, comprising the steps of: detecting rotational information of each tire; detecting a steering angle; storing the rotational information of each tire and the steering angle; calculating a reciprocal of a turning radius based on the rotational information of each tire; calculating a judged value based on the rotational information of each tire; and correcting, when performing correction of the judged value for decompressed condition due to cornering, the turning radius in case it has been determined on the basis of the steering angle that the vehicle is in a straight-ahead driving condition though the driving condition of the vehicle is a turning condition when being based on the turning radius obtained on the basis of the rotational information.
5. A method for alarming decrease in tire air-pressure based on rotational information obtained from tires attached to a four-wheeled vehicle, comprising the steps of: detecting rotational information of each tire; detecting a steering angle; storing the rotational information of each tire and the steering angle; calculating a turning radius based on the rotational information of each tire; correcting the turning radius in case it has been determined on the basis of the steering angle that the vehicle is in a straight-ahead driving condition though the driving condition of the vehicle is a turning condition when being based on the turning radius obtained on the basis of the rotational information; and determining a decompressed condition of a tire in case a correction coefficient for the turning radius as obtained during the correction process is not less than a threshold.
6. The method of claim 5, wherein the threshold is an integrated value in a predetermined time.
7. An apparatus for alarming decrease in tire air-pressure based on rotational information obtained from tires attached to a four-wheeled vehicle, comprising: a rotational information detecting means for detecting rotational information of each tire; a memory means for storing the rotational information of each tire; a calculating and processing means for calculating a judged value based on the rotational information of each tire; and a judged value correcting means for correcting the judged value based on a lateral acceleration obtained through a lateral acceleration sensor provided in the vehicle.
8. An apparatus for alarming decrease in tire air-pressure based on rotational information obtained from tires attached to a four-wheeled vehicle, comprising: a rotational information detecting means for detecting rotational information of each tire; a memory means for storing the rotational information of each tire; a calculating and processing means for calculating a judged value based on the rotational information of each tire; and a judged value correcting means for correcting the judged value based on a lateral acceleration obtained on a basis of values of a yaw rate sensor provided in the vehicle.
9. A method for alarming decrease in tire air-pressure based on rotational information obtained from tires attached to a four-wheeled vehicle, comprising the steps of: detecting rotational information of each tire; storing the rotational information of each tire; calculating a judged value based on the rotational information of each tire; and correcting the judged value based on a lateral acceleration obtained through a lateral acceleration sensor provided in the vehicle.
10. A method for alarming decrease in tire air-pressure based on rotational information obtained from tires attached to a four-wheeled vehicle, comprising the steps of: detecting rotational information of each tire; storing the rotational information of each tire; calculating a judged value based on the rotational information of each tire; and correcting the judged value based on a lateral acceleration obtained on a basis of values of a yaw rate sensor provided in the vehicle.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A composite steel and concrete floor construction comprising:
a concrete slab;
a plurality of individual laterally placed, parallel disposed, and supported joists, wherein each of said plurality of joists comprises an upper chord and a lower chord, said upper chord of at least one of said plurality of joists comprising a substantially cross-shaped cross section about a longitudinal axis;
an intermediate web member joining said upper chord and said lower chord, said intermediate web member comprising a plurality of tension and compression members triangulating a space between said upper chord and said lower chord;
wherein each of said upper chords of each of said plurality of joists comprises:
a first angle, said first angle comprising a first horizontal leg portion and an upward vertical leg portion; and
a second angle, said second angle comprising a second horizontal leg portion and a downward vertical leg portion; and
wherein at least a portion of each of said upward vertical leg portions of each of said first angles of each of said plurality of joists is embedded in said concrete slab; and
a reinforcing mesh at least partially supported upon said upper chords of said plurality of joists and hanging generally in a catenary shape therebetween and being fully embedded in said slab.
2. The composite steel and concrete floor construction of claim 1 wherein each of said first horizontal leg portions of each of said first angles of each of said plurality of joists comprises a plurality of concrete-engaging mechanisms.
3. The composite steel and concrete floor construction of claim 2 wherein said plurality of concrete-engaging mechanisms comprises a plurality of projections.
4. The composite steel and concrete floor construction of claim 2 wherein said plurality of concrete-engaging mechanisms comprises a plurality of raised portions and recessed portions.
5. The composite steel and concrete floor construction of claim 1 further comprising a plurality of support structures supporting each of said plurality of joists.
6. A method comprising the steps of:
supporting a plurality of joists between a plurality of support structures, each of said plurality of joists comprising:
an upper chord, said upper chord comprising a substantially cross-shaped cross section about a longitudinal axis, said upper chord comprising:
a first angle, said first angle comprising a first horizontal leg portion and a upward vertical leg portion; and
a second angle, said second angle comprising a second horizontal leg portion and a downward vertical leg portion;
a lower chord;
an intermediate web member joining said upper chord and said lower chord, said intermediate web member comprising a plurality of tension and compression members triangulating a space between said upper chord and said lower chord;
placing a plurality of removable spanner bars extending between said plurality of joists;
placing a support platform over said plurality of removable spanner bars; and
pouring a concrete slab over said support platform, thereby embedding at least a portion of at least one vertical leg portion of at least one of said plurality of joists in said concrete slab.
7. The method of claim 6 further comprising the steps of:
waiting for said concrete slab to cure;
removing said plurality of removable spanner bars; and
removing said support platform.
8. The method of claim 6 wherein said support platform comprises a plurality of plywood sheets.
9. The method of claim 6 further comprising the step of suspending a reinforcing mesh at least partially upon said upper chords of said plurality of joists prior to pouring said concrete slab, said reinforcing mesh hanging generally in a catenary shape therebetween and being fully embedded in said concrete slab.
10. The method of claim 6 wherein said upward vertical leg portion comprises a plurality of concrete-engaging mechanisms.
11. The method of claim 10 further comprising the step of engaging at least a portion of said concrete slab with said plurality of concrete-engaging mechanisms.
12. The method of claim 6 wherein at least one of said first horizontal leg portion and said second horizontal leg portion comprise a plurality of concrete-engaging mechanisms.
13. The method of claim 12 further comprising the step of engaging at least a portion of said concrete slab with said plurality of concrete-engaging mechanisms.