Tap Box & 4-Sided Manhole Shield by Efficiency Production

Efficiency Production, Inc.’s specifically designed 4-Sided Manhole Trench Shields and Tap Boxes are available with 4 inch wide steel panels in single or double walled models. Tap Boxes can be customized with bolt-on T-Door Panels for cross-trench utilities and connections. Four-sided manhole shields are frequently assembled with End Panel Connector (EC) Brackets.