1. Floor frame beam: the beam whose two ends are connected with the frame column (KZ) or the beam whose two ends are connected with the shear wall, but the span-height ratio is not less than 5.

2. Roof frame beam: located at the top of the whole structure.

Second, the structure is different.

1. Floor frame beam: Cast-in-place frame structure, that is, both beam and slab columns are cast-in-place with concrete, and the beam and slab columns form a unified whole.

2. Roof frame beam: assemble an integral frame structure. Beams and columns are prefabricated in the factory or on site, and then hoisted on site. Generally, steel plates are embedded in the appropriate parts of the components and welded after being installed in place; You can also weld the steel bars in beams and columns at the joints after hoisting, and pour some concrete on site to form a whole. The intermediate plate in the frame structure can be cast in place.

Third, the roles are different.

1. Floor frame beam: the beam that needs to participate in earthquake resistance. With the rise of high-rise buildings, pure frame structures are less and less common, and the frame beams in shear wall structures mainly participate in earthquake resistance.

2. Roof frame beam: it bears the self-weight of roof truss and the live load of roof, and the forces on it include the dead load and live load of floor slab.

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