Building truss

Abstract

A truss for a roof of a building structure includes a lower span having first and second horizontal joist portions on opposite ends of the truss. The first and second joist portions are adapted to be placed on upper ends of first and second sidewalls of a structure and with the first and second joist portions extending toward one another in substantially linear alignment. The first and second joist portions have a combined length less than a distance between the sidewalls. At least a third joist portion is disposed between opposing ends of the first and second joist portions and beneath a plane defined by the first and second joint portions. The third joist portion extends parallel to and spaced from the first and second joist portions. A first bracing member connects a first end of the third joist portion to a first joist portion. A second bracing member connects a second end of a third joist portion to the second joist portion. A plurality of rafters are connected to the lower span and connect at an angle thereto to define a ridge above the third joist portion. A plurality of braces connect the joist portions and the rafters in a pattern leaving a substantially unobstructed area above the third joist portion.

1 . A truss for a roof of a building structure having opposing first and second sidewalls terminating at an upper elevation, said truss comprising: 
 a lower span including: 
 first and second horizontal joist portions on opposite ends of said truss with said first and second joist portions adapted to be placed on upper ends of said first and second sidewalls and with said first and second joist portions extending toward one another in substantially linear alignment;  
 said first and second joist portions have a combined length less than a distance between said sidewalls;  
 at least a third joist portion disposed between opposing ends of said first and second joist portions and beneath a plane defined by said first and second joist portions and extending parallel to and spaced from said first and second joist portions;  
 a first bracing member connecting a first end of said third joist portion to said first joist portion;  
 a second bracing member connecting a second end of said third joist portion to said second joist portion;  
   a plurality of rafters connected to said lower span and connected at an angle thereto to define a ridge above said third joist portion;    a plurality of braces connecting said joist portions and said rafters in a pattern leaving a substantially unobstructed area above said third joist portion.    
   
   
       2 . A truss according to  claim 1  comprising a cross member between said braces and rafters above said third joist member and spaced therefrom to define an unobstructed area.  
   
   
       3 . A truss according to  claim 1  wherein said rafters and joist portions define a truss plane.  
   
   
       4 . A roof comprising: 
 a. a plurality of trusses having: 
 i. a lower span including: 
 1. first and second horizontal joist portions on opposite ends of said truss with said first and second joist portions adapted to be placed on upper ends of said first and second sidewalls and with said first and second joist portions extending toward one another in substantially linear alignment;  
 2. said first and second joist portions have a combined length less than a distance between said sidewalls;  
 3. at least a third joist portion disposed between opposing ends of said first and second joist portions and beneath a plane defined by said first and second joist portions and extending parallel to and spaced from said first and second joist portions;  
 4. a first bracing member connecting a first end of said third joist portion to said first joist member;  
 5. a second bracing member connecting a second end of said third joist portion to said second joist member;  
 
 ii. a plurality of rafters connected to said lower span and connected at an angle thereto to define a ridge above said third joist portion;  
 iii. a plurality of braces connecting said joist portions and said rafters in a pattern leaving a substantially unobstructed area above said third joist member;  
   b. said trusses disposed in parallel alignment with said unobstructed areas of said trusses defining an unobstructed volume.