Wooden cap for protection of open register well

Protection of horizontal hole of the mouth of access to a register well of 55 cm in diameter, during its construction process until its definitive cap is placed, made by wooden strips of pine of 15x5.2 cm, placed one next to the other to cover the entire hole, reinforced in its lower part by three strips in the opposite direction, fixed with steel nails, with rebate in its reinforcement to accommodate it in the hole of the plant of the mouth of access to the register well so that it prevents its horizontal movement, prepared to support a punctual load of 3 kN. Amortizable in 4 uses.