The check for design capacity of channel/I-section purlin is given by

• A. Mdz ≤ 1.2Zeyfy/γm0, Mdy ≤ 2.4Zezfy/γm0
• B. Mdz ≤ Zezfy/γm0, Mdy ≤ 1.2Zeyfy/γm0
• C. Mdz ≤ γfZeyfy/γm0, Mdy ≤ 1.2Zezfy/γm0
• D. Mdz ≤ 1.2Zezfy/γm0, Mdy ≤ γfZeyfy/γm0