Rolled h-section steel

Abstract

Provided is a rolled H-section steel having a web and flanges. The rolled H-section steel satisfies the following Expression (1) when H is the height of the rolled H-section steel, and B is the breadth of the flanges. The tensile strength is 400 to 510 N/mm 2 . The rolled H-section steel satisfies the following Expressions (2) and (3), when the plate thickness of the flanges is t 2 , and the design yield stress of a steel material of the rolled H-section steel is F(N/mm 2 ). ( B/H )≦0.77  (1) 11.1< B /(2× t 2 )≦215/√{square root over ( )}( F )  (2) 235≦ F ≦275  (3)

1 . A rolled H-section steel having a web and flanges, wherein:
 the rolled H-section steel satisfies a following Expression (1) when H is a height of the rolled H-section steel, and B is a breadth of the flanges;   a tensile strength thereof is 400 to 510 N/mm 2 ; and   the rolled H-section steel satisfies following Expressions (2) and (3), when a plate thickness of the flanges is t 2  and a design yield stress of a steel material of the rolled H-section steel is F (N/mm 2 ).
   ( B/H )≦0.77  (1)
 
   11.1 <B /(2 ×t   2 )≦215/√{square root over ( )}( F )  (2)
 
   235≦F≦275  (3)
 
   
     
     
         2 . The rolled H-section steel according to  claim 1 ,
 wherein the rolled H-section steel satisfies a following Expression (4) when a plate thickness of the web is t 1 .
   63.5<(( H− 2 ×t   2 )/ t   1 )≦1100/√{square root over ( )}( F )  (4)
 
   
     
     
         3 . The rolled H-section steel according to  claim 1 ,
 wherein a plate thickness t 1  of the web and the plate thickness t 2  of the flanges satisfy a following Expression (5).
   0.75<( t   1   /t   2 )<1.0  (5)