Can a Scissor Truss be Designed for a 28×40 House?
Can A scissor truss be designed an put on the roof of a new house 28 feet wide x 40 feet long,,,
Scissor trusses used for catherdral ceiling affect over half of house approx.,,Re ,,,over living room,,Kitchen & dineing area,,,Approx exterior roof pitch 3.5/12 or 4/12,,Balance of trusses would be same pitch,,,but just normal gable trusses,,,I want to line the interior of the scissor of the with pine or cedar lumber ?????,
I read somewhere ,,,wher scissor trusses flex with snow load,,but only one half inch,,,THKS,,,Terry from Northern Alberta Canada
28′-0″ Scissor trusses are certainly possible, however a 4/12 pitch is really much too shallow. You need about an 8/12 pitch for them to work, with the bottom chord being about 4/12. King post or queen post trusses are a better choice for a low roof pitch.
The material would most likely be douglas fir. Cedar and pine are usually too weak.