Box beam adjustable support systems

A support system for supporting a roof or a floor in a building comprising:

• a plurality of interlocking elements each interlocking element comprising
• a first interlocking element end and a second interlocking element end;
• a female segment having a female segment exterior surface, a female segment interior surface, and at least one female segment fastener slot, and
• a male segment having a male segment exterior surface and at least one male segment fastener slot,
• wherein the female segment fastener slot aligns with the at least one male segment fastener slot when a portion of the male exterior surface of the male segment engages the female segment interior surface of the female segment;
• at least one fastener operable to pass through the female segment fastener slot and the male segment fastener slot to secure the male segment in a position relative to the female segment;
• and
• at least one of an attachment point couplable to at least one of the first interlocking element end and the second interlocking element end wherein the attachment point is operable to secure the first interlocking element end or the second interlocking element end to a truss, and at least one cross-connector couplable to the interlocking element wherein the cross-connector is operable to secure a first interlocking element to a second interlocking element at an angle.