crossBeamAssemblyPositionType

complexType · extension complexBaseType · all

Cross beam of a floor

A cross beam is a transverse beam of a floor, attached to a frame: the profile of a structural element swept along a straight line across the fuselage. The same type describes the cross beams of the passenger floor and of the cargo floor; struts support them (crossBeamStrutAssemblyPositionType), and longitudinal floor beams run over them (longFloorBeamType).

Path

All values are given in the fuselage coordinate system. The cross beam lies in the plane of the frame <frameUID> at the height z = <positionZ>: it runs straight between the two points where the path of the frame has this height, i.e. from the surface on one side of the fuselage to the surface on the other. Its path runs from the end with the larger y to the end with the smaller y, i.e. from the right to the left side in flight direction. A floor with a slope has cross beams with different values of <positionZ>.

Lower half of the section through a fuselage at the frame at x = 7.5 m, seen from behind: the passenger cross beam at positionZ = -0.57 m below the fuselage axis, spanning the frame, with four seat rails on it and two vertical struts at positionYAtCrossBeam = +-1.1 m down to the frame; the cargo cross beam lower down with two seat rails and two struts inclined outwards, the right one at angleX = 200 degrees, measured from the upward z direction

The figure shows the lower half of the section at the second frame of the example: the passenger cross beam at z = −0.57 m, 20 mm below the cabin floor, with four seat rails and two vertical struts, and the cargo cross beam at the sill of the cargo door, on struts inclined outwards.

Profile

The profile of the profileBasedStructuralElementType named by <structuralElementUID> is swept along the path, with its origin on the path. The x-axis of the profile lies along the x-axis of the fuselage, and its y-axis along the direction of the path crossed with the x-axis, i.e. up. A profile drawn at y ≤ 0 therefore hangs below the path, and <positionZ> is the height of its upper edge. The <alignment> shortens the cross beam at its ends and moves or rotates the profile (alignmentCrossBeamType).

Two details of a floor at the same scale in millimetres: (a) seen from behind, the I-profile of a seat rail, 20 mm high, standing on the upper edge of a cross beam, with the axes of the profile (profile x to the right, along +y; profile y up) and the path pointing out of the drawing, and two floor panels on top of the rail, 20 mm above the path (offsetLocZ), with a gap at the axis of the rail; (b) seen from the left, the I-profile of the cross beam, 120 mm high below its path, with profile x along +x and profile y up, the seat rail and the floor panel on top

Figure (b) shows the I-profile of the cross beams of the example, 120 mm high below the path, seen from the left, with a seat rail on it; figure (a) shows the seat rail on the cross beam, seen from behind (longFloorBeamPositionType).

Rules

Example

The first passenger cross beam of the example, on the frame at x = 7 m, shortened by 30 mm at both ends: 

<paxCrossBeams>
    <paxCrossBeam uID="Fuselage_paxCrossBeam1">
        <structuralElementUID>CrossBeam</structuralElementUID>
        <frameUID>Fuselage_frame1</frameUID>
        <positionZ>-0.57</positionZ>
        <alignment uID="Fuselage_paxCrossBeam1_alignment">
            <offset1LocX>0.03</offset1LocX>
            <offset2LocX>0.03</offset2LocX>
        </alignment>
    </paxCrossBeam>
    ...
</paxCrossBeams>
Cross beam of the passenger floor

Attributes

NameTypeConstraintsUseDefaultDescription
@externalDataDirectoryxsd:stringoptionalDirectory of the external file the element was read from, as URI
@externalDataNodePathxsd:stringoptionalPath of the parent element in the merged dataset, at which the element was inserted from an external file
@externalFileNamexsd:stringoptionalName of the external file the element was read from
@uIDxsd:IDrequiredUID

Child elements

NameTypeConstraintsOccurrenceHow often the element may appear at this place. The schema writes it as minOccurs and maxOccurs on the declaration.DefaultDescription
allThe children below may appear in any order. Each may appear at most once.
structuralElementUIDstringUIDBaseType[1..1] requiredUID of the profileBasedStructuralElement whose profile the cross beam has
frameUIDstringUIDBaseType[1..1] requiredUID of the frame in whose plane the cross beam lies
positionZdoubleBaseType[1..1] requiredHeight of the path of the cross beam in the fuselage coordinate system [m]
alignmentalignmentCrossBeamType[0..1] optionalShortening of the ends, offset and rotation of the profile against the path

Used by

In a dataset · 4 paths

In the schema · 2 declarations

TypeName
cargoCrossBeamsAssemblyTypecargoCrossBeam
paxCrossBeamsAssemblyTypepaxCrossBeam