WRC107 Restriction

Sir,

Good day.

Can anyone help me in understanding wrc107 restriction for cylindrical shells.

• d/D ≤ ¼ for cylinders or < 0.6 with significant warnings
• D/T ≤ 600
• L/D ≥ 1.5
• ¼ ≤ C1 /C 2 ; 4

What is L, C1, C 2 ?

Thanks in advance.