C-type underbracing having enlarged end portions for installing on utility pole

Abstract

A C-type underbracing has developed for installing on a lower portion of a utility pole for firmly anchoring the utility pole. The underbracing is comprised of: a body ( 12 ) formed a half-annular or C-shape with a rectangular cross section; a pair of the enlarged end portions ( 11, 11 ′) having larger rectangular cross section than that of the body; a pair of the conjunction ( 17, 17 ′) for connecting between the body and the enlarged end portions; a hook receiving hole ( 13 ) horizontally through a center of the body, and a pair of nut mounting portions ( 16, 16 ′) formed flat surfaces for seating the nuts and a pair of slit-shaped holes ( 14, 14 ′) for horizontally inserting U-bolts ( 20 ) through the body portion, the nut mounting portions and slit-shaped holes disposed both sides of said hook receiving hole, and an earth plate ( 30 ) made of conductive material is attached to the bottom surface of the body.

1 . A C-type underbracing for installing on bottom of a utility pole, comprising:
 a body portion ( 12 ) formed a half-annular or C-shape with a rectangular cross section,   a pair of enlarged end portions ( 11 ,  11 ′) having larger rectangular cross section than that of the body portion ( 12 ),   a pair of conjunction portions ( 17 ,  17 ′) for connecting between the body portion ( 12 ) and the enlarged end portions ( 11 ,  11 ′),   a hook receiving hole ( 13 ), which are horizontally through a center of the body portion, and   a pair of nut mounting portions ( 16 ,  16 ′) formed flat surfaces for seating the nuts and a pair of slit-shaped holes ( 14 ,  14 ′) for horizontally inserting U-bolts ( 20 ) through the body portion, said nut mounting portions ( 16 ,  16 ′) and slit-shaped holes ( 14 ,  14 ′) disposed both sides of said hook receiving hole ( 13 ).   
   
   
       2 . The C-type underbracing as set forth in  claim 1 , further comprising a hook mounting seat ( 15 ) formed a circular-shaped flat area, which is sink-down around the hook receiving hole ( 13 ) for increasing frictional forces. 
   
   
       3 . The C-type underbracing as set forth in  claim 1 , further comprising an earth plate ( 30 ) made of conductive material for attaching to bottom surface of the body portion ( 12 ) and a ground wire ( 31 ) drawn out from the earth plate ( 30 ). 
   
   
       4 . The C-type underbracing as set forth in  claim 1 , wherein said nuts and U bolts are prevented adhering to the mounting portions ( 16 ,  16 ′) during the installation of underbracing, a seating surface ( 18 ) of the mounting portions ( 16 ,  16 ′) is inclined 5°˜10° outward for easily tightening the nuts, so that the U bolts and nuts gradually move outward of the slit-shaped holes ( 14 ,  14 ′).