Refurbished containers are used Watertight WWT containers that were fixed and modified so that you can be suitable for a range of purposes. classicT said: I feel that you're thinking of the IRC, that has the allowance for 3 or fewer risers just like exception #4 of the following IBC https://seecontainerkaufen79900.bligblogging.com/38323751/the-2-minute-rule-for-container-kaufen