Floor joist

Abstract

A floor joist including a first piece of lumber including a first set of fingers and a first set of grooves is provided. A second piece of lumber including a second set of fingers and a second set of grooves is also provided. A finger joint is formed by a combination of the first second of fingers with the second set of grooves and a combination of the second set of fingers with the first set of grooves. A first set of pockets are formed between the combination of the first second of fingers with the second set of grooves, and a second set of pockets are formed between the combination of the second set of fingers with the first set of grooves.

1 . A floor joist comprising:
 a first piece of lumber including a first set of fingers and a first set of grooves;   a second piece of lumber including a second set of fingers and a second set of grooves; and   a finger joint formed by a combination of the first set of fingers with the second set of grooves and a combination of the second set of fingers with the first set of grooves,   wherein a first set of pockets are formed between the combination of the first second of fingers with the second set of grooves, and   wherein a second set of pockets are formed between the combination of the second set of fingers with the first set of grooves.   
     
     
         2 . The floor joist according to  claim 1 , wherein the first set of pockets and the second set of pockets contain an adhesive. 
     
     
         3 . The floor joist according to  claim 2 , wherein the adhesive is a heat resistance adhesive. 
     
     
         4 . The floor joist according to  claim 1 , wherein the pockets span an entire width of the first piece of lumber and the second piece of lumber. 
     
     
         5 . A method of manufacturing a floor joist, the method comprising:
 performing an optical inspection of a package of lumber;   separating the package of lumber into three groups of lumber based on engineering grade;   performing a mechanical inspection of each of the three groups of lumber;   sorting each piece of lumber of the three groups of lumber into more than three groups of lumber based on a refined engineering value determined based on the mechanical inspection; and   manufacturing the floor joist using lumber entirely from one of the more than three groups of lumber based on a desired engineering value for the floor joist.