Roof Framing

various framing methods

Hip Framing

Trussed hip framing offers the advantage of clear span, an eave or fascia line at the same elevation around the building, and the speed of pre-built components.  The end slope may be equal to or different from the side slope.  The ceiling line may be flat or sloped.  Sloped ceilings have limitations, therefore, consult the truss designer

Terminal Hip Framing

Best suited for relatively short spans of 26'-0' or less, the hip jacks extend directly to the peak.  The distance from the end wall to the face of the girder is equal to one half the span, provided the slopes are equal.  The last standard truss is designed as a girder to carry the loads transferred by the hip jack

Step Down Hip Framing

Better suited for longer spans, the step down hip is the most versatile of all hip types.  Each of the "step down" trusses is the same span and has the same overhang as the adjacent standard trusses, but decrease in height to form the end slope.  The girder location is generally from 8 to 12 feet from the end wall and is determined by the span to depth ratio.  The corner and end jacks are normally pre-built.

 

Midwest Hip Framing

The Midwest type hip framing was developed to create a more uniform configuration of each of the trusses in the hip.  This hip type also provides for a more uniform structure for attaching the decking.  Spans achievable are in the mid range.

 

California Hip Framing

Although this type hip framing is used as an alternative to the step down hip, the California hip is similar in span capability and field installation.  The base portion of each truss inside the girder is the same, except that the sloping top cord of each successive truss is extended upward greater amounts to form the slope intersection.  Corner and end jacks are used to form the area outside the girder.

 

Framing with Trusses: Roofs