Construction Party Hanging Whirl Party Decorations. Add some pizazz to your construction party with these black and orange hanging party decorations. The signs are made of heavy cardstock paper that are printed on both sides. Detour Ahead, Road Work, and Hard Hat area make for some realistic looking signs. One package of 5 assorted dangling cutouts on black metallic whirls. Match with our other construction party supplies for a complete party look. Great for decorating windows, doorways, ceilings, and more.