One required for each cross arm support bracket for each track run. 5' spacing.
        
                    Unit of Measure
                    
               
        
            
                                                                                Material | 
                                                                        N/A Galvanized Steel | 
                                                                                Weight | 
                                                                        N/A .51 lb | 
                                                                                Load | 
                                                                        N/A 40 lb | 
                                                                                Speed | 
                                                                        N/A 250 fpm | 
