Elongated structures and related assemblies

A structural assembly for a vehicle fuselage, the structural assembly comprising:

• an elongated structure comprising a flange having a variable width along at least a portion of the elongated structure, wherein the elongated structure is a monolithic structure;
• and
• a plurality of frame members,
• wherein the elongated structure extends through an opening in each of the plurality of frame members,
• wherein the flange comprises a plurality of narrower flange sections and a plurality of wider flange sections,
• wherein the plurality of wider flange sections are each provided between adjacent frame members of the plurality of frame members,
• wherein each narrower flange section is provided at the opening in a respective one of the plurality of frame members, and
• wherein each narrower section is coplanar with a web of the elongated structure such that the elongated structure is configured to be coupled to each frame member by a respective mounting clip at each narrower section.

A structural assembly for a vehicle fuselage, the structural assembly comprising:

• a web extending along a length of an elongated structure;
• a bottom flange extending away from the web, the bottom flange being coupled to a skin assembly of the vehicle;
• and
• a top flange comprising a first flange portion and a second flange portion,
• wherein the web, the bottom flange, and the top flange comprise a monolithic structure,
• wherein the first flange portion and the second flange portion extends away from an area of the web in opposing directions traverse to the length,
• wherein the first flange portion of the top flange and the second flange portion of the top flange each comprises a variable width along at least a portion of the length of the elongated structure, and
• wherein the variable width of the first flange portion comprises a plurality of narrower flange sections and a plurality of wider flange sections in an alternating arrangement, and
• wherein each narrower flange section is coplanar with the web of the monolithic structure such that the monolithic structure is configured to be coupled to a plurality of frame members by a respective mounting clip at each narrower section.