MOLDED SERIES BEAMS:
Interior dimensions are irregular, but should be irrelevant unless being used to cover existing items (i.e. structural beams, ducts, pipes, wiring etc.). If using to cover existing items contact us for guidance on whether or not any of the Molded Series Beam sizes will work.
ARTISAN SERIES BEAMS:
Interior dimensions are calculated by subtracting 1 inch for each side of the beam. For example; a 3-sided 8”W x 8″H beam would have interior dimensions of 6″W x 7″H (8″W minus 1″ x 2 Sides = 6″W and 8″H minus 1″ for 1 bottom = 7″)