Cast-in-place hybrid building system

A building system comprising:

• a beam including reinforced cast-in-place concrete secured within an elongated precast concrete form having longitudinally extending reinforcing elements therein,
• a column including reinforced cast-in-place concrete secured within elongated, opposed precast concrete forms having longitudinally extending reinforcing elements therein,
• each said form having a transversely substantially U-shaped body to present a channel extending through a length thereof receiving the cast-in-place concrete, and further having a shear bonding member, and
• each bonding member being integrally pre-cast with the associated form, and having a groove extending inwardly into said form body and a rib extending outwardly from said form body into said channel, adapted to bond the cast-in-place concrete to the body of the form
• wherein said form body has a flat interior surface from which said groove portion and said rib portion extend inwardly and outwardly, respectively.

A method of forming a concrete cast-in-place beam or column comprising the steps of:

• (a) positioning an elongated, reinforced precast concrete form having a channel extending through a length thereof,
• (b) positioning elongated reinforcing elements in the channel of the form,
• (c) pouring cast-in-place concrete into the channel of the form, and
• (d) locking the cast-in-place concrete to the form with a shear bonding member integrally formed along the channel of the form, a rib portion of the bonding member extending into the poured concrete from a flat interior surface of the form and a groove portion of the bonding member extending inwardly from the flat interior surface of the form receiving the concrete therein.