Trench Shoring Panels Our Trench Shoring Panel is brown phenolic coated 4 sides. Arctic White Birch panels with waterproof phenolic glue, edgesealed, with face & back dark brown phenolic film coating. Trench Shoring Panels 2013-03-27T16:07:36+00:00 2014-04-22T16:50:07+00:00 fruition Home › Trench Shoring Panels Specifications Thickness Sheet Size Click link to view more. 3/4" 4' x 8', 14 Ply Additional Notes Meets OSHA spec for Trench Shoring Panels. Additional Notes Meets OSHA spec for Trench Shoring Panels. Questions? 800.936.7378 Call us or email us by following the link below. Contact Us Now!