System and apparatus for securing a floorplate to a structure
A multi-story building that includes a vertical support core and a plurality of floor plates is described, wherein fabrication of the building includes, in one embodiment, assembling each of the floor plates at or near ground level, and lifting each of the floor plates to a design level on the vertical support core. A system and device for securing one of the floor plates to the building includes employing a vertically-oriented lock-in bracket.
1. A system for securing a second beam to a first beam, comprising:
a vertically-oriented lock-in bracket including a third beam having a flange portion and a web portion, and a bracket horizontal stiffener; and
a plurality of fasteners;
wherein the first beam comprises a vertical column, wherein the first beam has a first flange, a web portion, and a second flange, a first plurality of through bolt holes being formed in the first flange of the first beam, and the first flange of the first beam having an outer surface,
wherein the second beam comprises a horizontal girder, wherein the second beam has an upper flange, a lower flange, and a web portion;
wherein a first vertical stiffener is affixed to the upper flange, the lower flange, and the web portion on a first side of the second beam;
wherein a second vertical stiffener is affixed to the upper flange, the lower flange, and the web portion on a second side opposed to the first side of the second beam;
wherein the web portion of the third beam is affixed to the first vertical stiffener of the second beam at a lower portion of the third beam;
wherein a second plurality of through bolt holes are formed on the flange portion of the third beam at an upper portion thereof; and
wherein the first plurality of through bolt holes in the first flange of the first beam are disposed opposite to and correspond to the second plurality of through bolt holes disposed on the upper portion of the flange portion of the third beam; and
wherein the plurality of fasteners are inserted through the first plurality of through bolt holes and the second plurality of through bolt holes and secured thereto.
2. The system of claim 1 , wherein the web portion of the first beam, the web portion of the third beam, the first vertical stiffener, and the second vertical stiffener are coplanar.
3. The system of claim 1 , wherein the web portion of the first beam, the web portion of the third beam, the first vertical stiffener, and the second vertical stiffener form a continuous vertically-oriented sheet of steel.
4. The system of claim 1 , wherein the lower flange of the second beam, the bracket horizontal stiffener, and one of the first horizontal stiffeners affixed to the first beam are coplanar and form a continuous horizontally-oriented sheet of steel.
5. The system of claim 1 , wherein the first plurality of through bolt holes formed in the first flange of the first beam comprise oversized bolt holes that are elongated in a vertical direction.
6. The system of claim 1 :
wherein the outer surface of the first flange of the first beam has a slip-critical surface;
wherein an outer surface of the flange portion of the third beam has a slip-critical surface; and
wherein the slip-critical surface of the outer surface of the flange portion of the first beam is arranged opposite to the slip-critical surface of the outer surface of the flange portion of the third beam to form a slip-critical interface.
7. The system of claim 1 , wherein the bracket horizontal stiffener is arranged orthogonal to the flange portion and the web portion of the third beam at the lower portion of the third beam.
8. The system of claim 1 , further comprising a plurality of first horizontal stiffeners being affixed to the web portion and the first and second flanges of the first beam.
9. The system of claim 8 , wherein the lower flange of the second beam, the bracket horizontal stiffener, and one of the first horizontal stiffeners affixed to the first beam are coplanar.
10. The system of claim 8 , wherein others of the first horizontal stiffeners of the first beam are affixed to the first beam adjacent to the upper portion of the flange portion of the second beam.
11. The system of claim 1 , wherein the first beam comprises a steel I-beam having a web portion that is arranged between the first flange and a second flange.
12. The system of claim 1 , wherein the second beam comprises a steel I-beam having the web portion arranged between the first flange and the second flange.
13. The system of claim 1 , wherein the third beam comprises a steel T-beam.
14. A device for securing, to a vertically-oriented first beam, a horizontally-oriented second beam of a floor plate, the device comprising:
a vertically-oriented lock-in bracket including a third beam having a flange portion and a web portion, and a bracket horizontal stiffener;
wherein a plurality of bolt holes are formed on the flange portion of the third beam at an upper portion thereof;
wherein the bracket horizontal stiffener is arranged orthogonal to the flange portion and the web portion of the third beam at a lower portion thereof;
wherein an outer surface of the flange portion of the third beam has a slip-critical surface;
wherein the horizontally-oriented second beam has an upper flange, a lower flange, and a web portion; wherein a first vertical stiffener is affixed to the upper flange, the lower flange, and the web portion on a first side of the second beam; and a second vertical stiffener affixed to the upper flange, the lower flange, and the web portion on a second side opposed to the first side of the second beam;
wherein the vertically-oriented lock-in bracket is affixed to the horizontally-oriented second beam of the floor plate and is slidably arranged on the vertically-oriented first beam when the floor plate, including the web portion of the third beam being affixed to a first vertical stiffener of the horizontally-oriented second beam at the lower portion of the third beam, and the first vertical stiffener being affixed to an upper flange, a lower flange, and a web portion of the horizontally-oriented second beam on a first side;
wherein the vertically-oriented lock-in bracket is slidably arranged on the vertically-oriented first beam; and
wherein the vertically-oriented lock-in bracket is affixed to the vertically-oriented first beam.
15. The device of claim 14 , wherein the slip-critical surface of the outer surface of the flange portion of the third beam is arranged opposite to a slip-critical surface of an outer surface of a flange portion of the first beam to form a slip-critical interface.
16. The device of claim 14 , wherein the plurality of bolt holes formed on the flange portion of the third beam are disposed opposite to and correspond to a plurality of through bolt holes arranged in a flange portion of the first beam, and wherein the plurality of through bolt holes formed in the first flange of the first beam are oversized bolt holes that are elongated in a vertical direction.
17. The device of claim 14 , wherein the lower flange of the second beam, the bracket horizontal stiffener, and one of the first horizontal stiffeners affixed to the first beam are coplanar and form a continuous horizontally-oriented sheet of steel.
18. The device of claim 14 , wherein the web portion of the first beam, the web portion of the third beam, the first vertical stiffener, and the second vertical stiffener are coplanar and form a continuous vertically-oriented sheet of steel.
19. A system for securing a floor plate to a structure/building, comprising:
a vertically-oriented column including a first beam, wherein the first beam has a first flange, a web portion, and a second flange, and the first flange of the first beam having an outer surface, and wherein the outer surface of the first flange of the first beam has a slip-critical surface;
a floor plate including at least one horizontal girder including a second beam, the second beam having an upper flange, a lower flange, and a web portion;
a vertically-oriented lock-in bracket including a third beam having a flange portion and a web portion, wherein the third beam is affixed to the second beam at a lower portion of the third beam, and wherein an outer surface of the flange portion of the third beam has a slip-critical surface;
wherein the vertically-oriented lock-in bracket is affixed to the horizontal girder of the floor plate, including the web portion of the third beam being affixed to a first vertical stiffener of the second beam at the lower portion of the third beam, and the first vertical stiffener being affixed to the upper flange, the lower flange, and the web portion of the second beam on a first side; and
wherein a second vertical stiffener is affixed to the upper flange, the lower flange, and the web portion on a second side opposed to the first side of the second beam;
wherein the slip-critical surface of the outer surface of the flange portion of the first beam is arranged opposite to the slip-critical surface of the outer surface of the flange portion of the third beam to form a slip-critical interface.
20. The system of claim 19 , wherein the web portion of the first beam, the web portion of the third beam, the first vertical stiffener, and the second vertical stiffener are coplanar and form a continuous vertically-oriented sheet of steel.