NF P22-468:1987 Steel construction. Bolted joints with controlled tightening. Tightening by controlled turn of nut. Determination of the angle of rotation.
2011NF P22-101-2:2011 Execution of steel structures and aluminium structures - Part 2 : technical requirements for steel structures.
2009NF P22-101-2:2009 Execution of steel structures and aluminium structures - Part 2 : technical requirements for steel structures.
1987NF P22-468:1987 Steel construction. Bolted joints with controlled tightening. Tightening by controlled turn of nut. Determination of the angle of rotation.