|    1/2" Hub (Female 
            Pipe Thread (option "A") 3/4" Hub (Female Pipe Thread (option "B") 
            Unless otherwise specified, standard location is 3' above base and 
            90° from handhole (clockwise when facing single arm/drilling) |  |   
            Vibration Damper (Option "V")  Occasionally, 
            because of a phenomenon caused by local peculiarities of the site 
            and/or prevailing winds, poles may be susceptible to wind induced 
            harmonic vibrations in the 10 to 20 MPH wind range. Vibration 
            dampers which alleviate this condition are available.   Standard Convenience Outlet (Option "C") 
            Unless otherwise specified, standard location is 4' above base on 
            same side as handhole. (For GFI convenience outlet, specify option 
            "E")  Handhole
             Flush type 
            handholes are furnished on all poles with standard bases. Poles with 
            alternate bases will have a handhole only where there is no access 
            in the base.  All poles 
            are furnished with a 5/16"-18NC-2 standard tapped hole inside the 
            pole or base for grounding purposes. If a ground lug is required 
            order as option G. Assembly is then provided with Dossert copper 
            ground lug or equivalent.   Optional Transformer Base | 
          
            | 
            Vibration Pads (Option "F")   Where poles 
            are installed on bridges, motion of the bridge structure itself can 
            transmit vibration into the light pole, with adverse effects on arms 
            and luminaires. To minimize this problem, vibration pads and washers 
            are available, along with installation instructions. 
             For most bridge applications, a combination of 
            vibration damper and pad is a wise investment. For further 
            information about vibration dampers and pads, contact your local P&K 
            Pole Products representative or the factory |