Beam
AssigneeMultibeam Finland Oy
InventorsLauri WILKMAN, Lauri HALONEN
Life of this patent
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Abstract
A beam including a web with a longitudinal center line, and the web including at least a first row of plurality of apertures, in a longitudinal direction of the beam, said first row of plurality of apertures are arranged on a first longitudinal axis parallel with the longitudinal center line. A distance between centers of adjacent apertures satisfies the following condition: Dadjacent=1000 mm/(2*n), where Dadjacent is a distance between the centers of the adjacent apertures in the first row of the plurality of the apertures and n is a natural number.
Claims14
A beam comprising a web with a longitudinal center line, and the web comprising at least a first row of plurality of apertures, in a longitudinal direction of the beam, said first row of plurality of apertures are arranged on a first longitudinal axis parallel with the longitudinal center line, and
- a second row of plurality of apertures, the first row of plurality of apertures and the second row of plurality of apertures are parallel with each other, wherein the first row of plurality of apertures and the second row of plurality of apertures are at an equal distance away from the longitudinal center line,
- wherein a distance between centers of adjacent apertures satisfies the following condition:
- D
- adjacent
- =
- 1000
-
- mm
- /
- (
- 2
- *
- n
- )
- ,
- or
- D
- adjacent
- =
- 3
- *
- 1000
-
- mm
- /
- (
- 2
- *
- n
- )
- ,
- wherein Dadjacent is a distance between the centers of the adjacent apertures in the first row of the plurality of the apertures and n is a natural number, and
- the beam has external dimensions which satisfies the following condition:
- D
- y
- ,
- z
- =
- 1000
-
- mm
- ,
- or
- D
- y
- ,
- z
- =
- 1000
-
- mm
- /
- (
- 2
- *
- n
- )
- ,
- D
- y
- ,
- z
- =
- 1000
-
- mm
- *
- 2
- *
- n
- ,
- or
- D
- y
- ,
- z
- =
- 3
- *
- 1000
-
- mm
- /
- (
- 2
- *
- n
- )
- wherein Dy,z is height or width or both of the beam, and n is a natural number.
Dependencies are inferred from the claim text.