Rafter Supported Cone Roof

A collar tie is a horizontal roof rafter compression connector that is located in the uppermost third of the span of a pair of opposed sloped or gable roof rafters.

Rafter supported cone roof.

The spans in this table are based on a maximum supported rafter span of 16 feet where the supported span is the total horizontal distance spanned by the roof rafters divided in half not the diagonal distance or the length of the rafter. The braces struts or kickers should be within every 4 and should not be at a greater than a 45 degree angle towards the roof slope lower side. Good access exists to tank for equipment and materials. They are inclined members spaced from 16 to 48 inches apart.

The tops of inclined rafters are fastened to the ridge or another rafter depending on the type of roof. Hi all i am new to this rafter lingo and techniques but am building a shed that is 16 x16. Supported at tank shell and load is transferred to tank periphery. The system of rafters is provided to support the roof plate.

They are 90 degrees to the ridge and to the other king common. Roof is designed as a supported cone roof. In finding this location we do not count the additional length of the rafter that supports the roof eaves overhang or soffit. So this table could accommodate a house with a total rafter span or house width of 32 feet.

The purlins are supported by vertical or slightly angled bracing. No hours are included for a dedicated fire safety watch. Roof plate shall be designed as continuous beam with uniform load comprising of roof live load and self weight of roof plate. Purlins as shown in sample photos below are installed for rafter support.

They vary in size depending on length and spacing. I plan to have 2 10 joists so there will be a second floor. I plan to support the ridge beam with support beam in the middle and the ends. By upper third here we mean one third of the length of the rafter from ridge to top plate.

Tank is clean gas and lead free and ready for hot work. Rafters rest on the top wall plate. Then the other two king commons support the ridge from the sides. Rafters rafters make up the main framework of all roofs.

Rafters are nailed to the plate. From the second floor i have added another 2 framing around on which the roof rafters will sit. Like framing a hip roof framing a cone or in this case a half cone begins with three common rafters.