Mullion splice joint design

A support assembly for supporting at least a portion of a curtain wall of a building, said support assembly comprising:

• a plurality of building anchor assemblies attached to said building;
• a first curtain wall support section connected to a first building anchor assembly, said first support section having a first upper end;
• a second curtain wall support section connected to a second building anchor assembly, said second support section having a second end spaced apart from said first upper end to form a gap;
• and
• means for displacing said second curtain wall support section relative to said second building anchor assembly while supporting said curtain wall portion.

A mullion assembly for supporting a portion of a curtain wall that forms a portion of the exterior of a building, said mullion assembly comprising:

• a first mullion section extending along a major axis from a first end to a second end;
• a first building anchor assembly connected to said building and supporting said first mullion section in a generally vertical orientation of said major axis;
• a second mullion section extending along a major axis from a first end to a second end;
• and
• means for slidably connecting said second mullion section to a second building anchor assembly such that a first end of said second mullion section is spaced apart from said a second end of said first mullion section and relative motion between said first and second mullion sections is limited even when relative motion between said first and second building anchor assemblies exceeds said limited relative motion between said first and second mullion sections.

An apparatus for limiting the axial motion of individually supported sections of an end-to-end assembly of sections, said apparatus comprising:

• means for slidably connecting each of said sections to a structural support for each section:
• an end connector capable of providing a variable dimension gap between said sections in said assembly;
• and
• means for limiting the variation of gap dimensions to a first range of displacements between sections when said structural supports are displaced over a second range of relative displacements between said structural supports and said second range is greater than said first range.