The truss configurations is selected based on the span of trusses. Below shown are some of the standard truss configurations along with span
Span Up to 16'
Span 10' to 22'
Span 16' to 33'
Span 24' to 36'
Span 30' to 36'
Span 32' to 44'
Span 40' to 60'
Span 40' to 60'
Span 44' to 60'
Span 54' to 80'
Span 54' to 80'
Let's talk about Lumber sizes in next topic