For large diameter nozzles, the rules of Appendix 1-7 require that two-thirds of the reinforcement be within 0.75 of the natural diameter limit for the nozzle. If the calculated value of the percent within this limit is greater than 66%, the nozzle is adequately reinforced for the large diameter rules. For a large nozzle geometry to meet Code requirements both sets of area calculations must meet their respective area requirements.