upon a collective bargaining contract the union, which was the certified bargaining agent, called a strike in support of its demands. During the course of the strike the union picketed the several entrances to the plant. Along the south boundary of Carrier’s property was a 35-foot railroad right-of-way used by the railroad for deliveries to Carrier and to three other companies in the area, General Electric, Western Electric, and Brace-Mueller-Huntley. The railroad spur ran across Thompson Road, a public thoroughfare which bounded Carrier’s property on the west, and through a gate in a continuous chain-link fence which enclosed both the property of Carrier Corporation and the railroad right-of-way. The gate was locked when the spur was not in use and was accessible only to railroad employees. The picketing with which we are concerned occurred at this gate.
Between March 2 and March 10, railroad personnel made several trips through the gate for the purpose of switching out cars for General Electric, Western Electric and Brace-Mueller-Huntley, and also to supply coal to Carrier and General Electric.2 On March 11 a switch engine manned by a regular switching crew made one trip serving the three nonstruck corporations. It then returned, this time manned by supervisory personnel, with 14 empty boxcars. The pickets, being aware that these cars were destined for use by Carrier, milled around the engine from the time it reached the western side of Thompson Road, attempting to impede its progress. By inching its way across the road, however, the locomotive succeeded in reaching and entering the gate. After uncoupling the empties just inside the railroad right-of-way, for future use by Carrier, the engine picked up 16 more
2
The union made no objection to the deliveries of coal to Carrier, since the nonstruck General Electric plant obtained its coal from Carrier.