There are two types of unbonded prestressed concrete beams according to tendon layout: unbonded internally prestressed concrete beam and externally prestressed concrete beams.

• 无粘结预应力混凝土梁按照预应力布束方式的不同具有两种形式:体内无粘结预应力混凝土梁和体外预应力混凝土梁。