The steel Wall Spreader from Lightbulb Rentals accepts a length of 2 x 4" lumber at each end which is then expanded by a bolt on the clamp to create a span between two walls from which light fixtures and other grip gear can be hung.
Speed Rail: Round Corner (1-1/4″)$3/day
Heavy-Duty Adjustable Background Crossbar (4.8′ to 13′)$7/day
Furniture Clamp: 6″$6/day
2″ x 4″ Flat Plate Clamps (Fixed)$8/day
Magic Finger – Baby Swivel Pin$10/day
Square Frame: Ear (3/4″)$2/day
Right Angle Baby Plate$3/day
Hollaender Fitting: 45° Angled Tee (1-1/4″)$8/day