The part of the building structure, typically below grade, upon which all other construction is built is known as:

horizontal structural member that supports a floor. Beams are typically wood, cold formed metal framing or steel.

Joists

Horizontal timbers, beams or bars supporting a floor.

This is an advertisement for Honda motorcycles. Based on the picture, the location it shows (beach front at sunset), and the man in the advertisement, the target audience is most likely males in either their 20s or 30s, or perhaps older males who want to feel younger again. The advertisement and the imagery used speaks of such emotions and experiences as, independence, power, wide-open spaces, and freedom.