Construction Joist and Joist Assembly

Abstract

A roof and floor framing assembly are described, using a steel construction joist having a 16-inch height, for building single-family homes in compliance with Type 1A non-combustible definition in Chapter 6 of the California Building Code (CBC). The joist assembly includes a plurality of steel joists bolted directly to opposing load-bearing reinforced concrete walls using knife plates, and spaced approximately 96 inches apart for most applications. A plurality of insulated steel roof panels or floor panels are arranged and connected perpendicular to and covering the plurality of steel joists. In roof construction, the plurality of steel joists are arranged perpendicular to the direction of slope of the roof.

What is claimed is: 
     
         1 . A non-combustible roof assembly for a residential construction having a roof and a plurality of reinforced concrete outer walls, the roof assembly comprising:
 a framing assembly comprising:
 a plurality of steel joists, each perpendicular to a direction of slope of the roof and spaced apart a first distance from one another, wherein each of the plurality of steel joists is secured to and spans a second distance of at least 15 feet between two of the plurality of reinforced concrete outer walls; 
 a plurality of steel braces arranged to connect to and between adjacent steel joists from the plurality of steel joists; and 
   a plurality of steel structural roof panels secured and perpendicular to the plurality of steel joists.   
     
     
         2 . The non-combustible roof assembly of  claim 1 , wherein the first distance is in a range of from 4 to 8 feet. 
     
     
         3 . The non-combustible roof assembly of  claim 2 , wherein the first distance is 6 feet. 
     
     
         4 . The non-combustible roof assembly of  claim 1 , wherein the second distance is at least 20 feet. 
     
     
         5 . The non-combustible roof assembly of  claim 1 , wherein each of the plurality of steel beams comprises a plurality of stiffener flanges to provide rotational stability. 
     
     
         6 . The non-combustible roof assembly of  claim 4 , wherein the second distance is at least 26 feet. 
     
     
         7 . The non-combustible roof assembly of  claim 1 , wherein the roof assembly complies with Type 1A non-combustible definition in Chapter 6 of the California Building Code (CBC). 
     
     
         8 . A floor assembly for a residential construction having at least one floor and a plurality of reinforced concrete outer walls, the floor assembly comprising:
 a joist assembly comprising:
 a plurality of steel joists, each spaced apart a first distance from one another, wherein each of the plurality of steel joists is secured to and spans a second distance of at least 15 feet between two of the plurality of reinforced concrete outer walls; 
 a plurality of steel braces arranged to connect to and between adjacent steel joists from the plurality of steel joists; and 
   a plurality of steel structural floor decking secured and perpendicular to the plurality of steel joists.   
     
     
         9 . The non-combustible floor assembly of  claim 8 , wherein the first distance is in a range of from 4 to 8 feet. 
     
     
         10 . The non-combustible floor assembly of  claim 9 , wherein the first distance is 8 feet. 
     
     
         11 . The non-combustible floor assembly of  claim 8 , wherein the second distance is at least 20 feet. 
     
     
         12 . The non-combustible floor assembly of  claim 8 , wherein each of the plurality of steel joists comprises a plurality of stiffener flanges to provide rotational stability. 
     
     
         13 . The non-combustible floor assembly of  claim 11 , wherein the second distance is at least 26 feet. 
     
     
         14 . The non-combustible floor assembly of  claim 8 , wherein the roof assembly complies with Type 1A non-combustible definition in Chapter 6 of the California Building Code (CBC). 
     
     
         15 . A method for constructing a non-combustible residential home comprising:
 erecting a plurality of reinforced concrete outer walls;   building a floor assembly for each story of the non-combustible residential home, each floor assembly comprising:
 a first joist assembly comprising:
 a plurality of steel joists, each spaced apart a first distance from one another, wherein each of the plurality of steel joists is secured to and spans a second distance of at least 15 feet between two of the plurality of reinforced concrete outer walls; 
 a plurality of steel braces arranged to connect to and between adjacent steel joists from the plurality of steel joists; and 
 a plurality of steel structural floor decking secured and perpendicular to the plurality of steel joists; 
 
   erecting a non-combustible roof assembly comprising:
 a second joist assembly comprising:
 a second plurality of steel joists, each perpendicular to a direction of slope of the roof and spaced apart a third distance from one another, wherein each of the plurality of steel joists is secured to and spans a fourth distance of at least 15 feet between two of the plurality of reinforced concrete outer walls; 
 
 a second plurality of steel braces arranged to connect to and between adjacent steel joists from the second plurality of steel joists; and 
   a plurality of steel structural roof panels secured and perpendicular to the second plurality of steel joists.   
     
     
         16 . The method of  claim 15 , wherein the first distance is in a range of from 4 to 8 feet. 
     
     
         17 . The method of  claim 16 , wherein the first distance is 8 feet. 
     
     
         18 . The method of  claim 15 , wherein the second distance is at least 20 feet. 
     
     
         19 . The method of  claim 15 , wherein each of the plurality of steel joists comprises a plurality of stiffener flanges to provide rotational stability. 
     
     
         20 . The method of  claim 18 , wherein the second distance is at least 26 feet. 
     
     
         21 . The method of  claim 15 , wherein the non-combustible residential home complies with Type 1A non-combustible definition in Chapter 6 of the California Building Code (CBC).