218 



METHODS OF COMMUNICATION FOR FOREST PROTECTION 



11 Specifications for Wooden Brackets 



The articles desired under these specifications consist of oak pole-brackets, fitted 

 to take the standard insulator. 



.Workmanship. All workmanship shall be of the best commercial grade. 



Material. All brackets shall be made of sound oak, free from knots, checks or 

 cracks, sapwood, worm-holes, and brash wood. The grain of wood on 'all brackets 

 shall be practically parallel to the axis of the threaded portion of the bracket. The 

 grain from the right-angled corner at the end of the bracket shall not run below the 

 bottom thread ,on the opposite face of the bracket. 



Pole Line Bracket 



Specifications 11 Design of Forestry Branch standard wooden bracket 



All brackets shall be thoroughly seasoned' before being offered for inspection. 



Dimensions. The seasoned brackets shall be of the style and dimensions shown 

 in the drawing attached hereto and made part of these specifications. Where maxi- 

 mum and minimum dimensions are shown, the dimensions shall be within the limits 

 specified. Where limits are not shown, the dimensions shall be approximate. Figures 

 upon the drawings shall be followed in preference to scale measurements. ' 



Thread. The threaded portion of the bracket shall be as nearly .as possible of a 

 circular cro,ss-seetion. The thread! shall be smooth and of a uniform pitch, ,and such 

 that a standard insulator can be readily screwed on to the bracket until the end of the 

 bracket touches the top of the insulator. When in this position there should be no per- 

 ceptible rocking or play of the insulator on the bracket. 



Nail holes. Each bracket ishall h,ave two nail holes as shown,' in the drawing 

 attached hereto. The nail holes shall be well centred and shall be perpendicular to 

 that face of the (bracket which makes an angle with the axis of the (thread. 



