Structure for making fences, grates, guardrails and other similar carpentry products

Abstract

There is provided a structure for making fences, grates, guardrails, and other similar carpentry products including a plurality of stakes (10) which retain and support an upper crossbar (20) and a lower crossbar (21) by mobile connections (30, 31). Each of the stakes (10) includes an elongated central body (11) and portions of reduced length (12, 13) projecting above and below upper crossbar (20) and lower crossbar (21), respectively. The connection of an upper reduced length portion (12) and a lower reduced length portion (13) to central body (11) being formed by mobile screw connections (30, 31) of the threaded shank/threaded hole type locking each of the crossbars (20, 21) to a stake (10). The screwing action being facilitated by an appendage (40) projecting from and frangibly connected to the portions of reduced length (12, 13) adapted to break and be completely removed from the portions of reduced length when the maximum tightening torque is achieved.

1 - 4 . (canceled) 
     
     
         5 : A structure for making fences, grates, guardrails and other similar carpentry products, of the type including a plurality of stakes ( 10 ) retaining and supporting an upper crossbar ( 20 ) and a lower crossbar ( 21 ) by mobile connections, wherein each stake ( 10 ) includes an elongated central body ( 11 ), a first reduced length portion ( 12 ) projecting above said upper crossbar ( 20 ), a second reduced length portion ( 13 ) projecting below said lower crossbar ( 21 ), a first mobile screw connection ( 30 ) having a threaded shank/threaded hole ( 15 ,  16 ) structure fastening said upper crossbar ( 20 ) to said each stake ( 10 ), and a second mobile screw connection ( 31 ) having a threaded shank/threaded hole ( 15 , 16 ) structure fastening said lower crossbar ( 21 ) to said each stake ( 10 ), wherein a first appendage ( 40 ) projects from said first reduced length portion ( 12 ) and a second appendage ( 40 ) projects from said second reduced length portion ( 13 ), said first and second appendages being respectively connected by a frangible connection to said first and second reduced length portions so that upon complete and forced screwing and under maximum torque said first and second appendages break from said first and second reduced length portions, wherein the frangible connection of said first and second appendages ( 40 ) to said first and second reduced length portions ( 12 ,  13 ) comprises a greatly reduced cross-sectional portion ( 41 ). 
     
     
         6 : The structure as defined in  claim 5 , wherein each of said upper crossbar ( 20 ) and lower crossbar ( 21 ) includes a through hole ( 22 ) coaxially aligned with a threaded shank/threaded hole ( 15 ,  16 ) of the first and second mobile screw connections ( 30 ,  31 ) of said each stake ( 10 ). 
     
     
         7 : The structure as defined in  claim 5 , wherein said first mobile screw connection ( 30 ) fastens said upper crossbar ( 20 ) between said elongated central body ( 11 ) of said each stake ( 10 ) and said first reduced length portion ( 12 ), and said second mobile screw connection ( 31 ) fastens said lower crossbar ( 21 ) between said elongated central body ( 11 ) of said each stake ( 10 ) and said second reduced length portion ( 13 ). 
     
     
         8 : The structure as defined in  claim 5 , which further includes a column ( 50 ) supporting said upper crossbar ( 20 ) and said lower crossbar ( 21 ) fastened to said each stake ( 10 ), wherein said upper crossbar ( 20 ) and lower crossbar ( 21 ) are each connected to said column ( 50 ) by an angle section ( 51 ) including a third mobile screw connection ( 32 ) having a threaded bolt ( 32 ′) provided with a third appendage ( 40 ′) projecting from said threaded bolt ( 32 ′) and connected thereto by a frangible connection so that upon complete and forced screwing and under maximum torque said third appendage ( 40 ′) breaks from said threaded bolt ( 32 ′) of said third mobile screw connection ( 32 ) wherein said frangible connection of said third appendage ( 40 ′) to said threaded bolt ( 32 ′) comprises a greatly reduced cross-sectional portion ( 41 ′).