Cantilever 2nd Floor

Figure 5 using good construction practice to determine length of cantilever.

Cantilever 2nd floor. A cantilevered floor is a floor that sticks out past the foundation or supporting wall below. A longer cantilever is an expensive feature since it takes substantial engineering and proper load calculations but the effect is truly dramatic. When you choose to cantilever a bump out the dimensions of your house s joists dictate the depth of the bump out. It may be a first or second story bump out a bay window or a room over an open porch.

In this situation 2x joists should extend back into the floor at least eight feet using a recommended 2 3 ratio. Located on the second floor the living room hovers above the lower deck. Floor cantilevers constructed in accordance with table r502 3 3 1 shall be permitted where supporting a light frame bearing wall and roof only. It is possible to extend beyond four feet but each situation must be examined and analyzed for structural capacity.

Floor cantilevers supporting an exterior balcony are permitted to be constructed in accordance with table r502 3 3 2. The recommended maximum extension for a cantilevered exterior deck is four feet. In a residential home cantilevered surfaces can be used in several ways such as a bay window that projects from the house or an area of the second floor where the exterior wall extends out past. Floor cantilever spans shall not exceed the nominal depth of the wood floor joist.

Jun 29 2012 explore julie anne reda s board cantilever second story on pinterest. Generally bump outs can be cantilevered a distance equal to four times the size depth of the floor joists. Upper level bump outs often are small enough that they can be cantilevered from the second floor framing.