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05/15/01 TUE 05:49 FA% �002 <br /> The roof ower the Painting Drawing room is 1082sqft, and has two leaders. <br /> Each leader serv�:� 546sqft (1092 =2 =546) of roof. The table calculates their <br /> sizes to be 2 inch:;s. We will be using 4 inch leaders. <br /> The roof ov►er the classrovms is 14,053sqft. and has 6 leaders. Each <br /> leader serves 23�2sqft (14,053 :6 = 2342) of roof. The table calculates their <br /> sizes to be 4 inchas. We will be using 4 inch leaders. <br /> The maximum recjuired drain size from above is 4 inches, we will be using 4 inch <br /> drain for alf the le�ders for uniformity. <br /> In Section 1506 0�the UBC Handbook you included, there is the description of <br /> combined overfto�v and drain in one scupper. This seems to be our condition. If <br /> so, the scupper size should be four times the drain size. - one time for the drain <br /> itself and three tiri,�es for the required overflow with a minimum height of 4 inches. <br /> The scupper size�rould be 4 inches high by i 6 inches wide. We will use this <br /> size for all of our �cuppers. � <br /> I will contact you �fter you have time to review this information to see if there are <br /> any additional iter�ns you would like to discuss, or if there are any of these issues <br /> we need to exami�e some more. <br /> Thank you � <br /> Patnck Regan �� <br /> James Dayton De�ign. <br /> �� <br />