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htAY 29 '9'� 15�17 FLYMQUTH DUt,IDEE P.b <br /> � � <br /> . . Struatural C2,1Cu�atS,0i15 Gar�t. 8- -90 � <br /> : <br /> Roof Beam Galculatiori ( 12 ' Gaxebo) <br /> Formu3.as: Moment M = w12/$ <br /> 5hear V = wl/2 4 <br /> , Def�.ection D = 5wl /384EI . <br /> w - w�. _ <br /> A�lowable Mo:�ent: M � S x Fb <br /> AllcWable Sheax: V = 2bd(Fv�/3 <br /> Al,Zouable Def3ect•ion: D = 1/240 <br /> S of 4"x4" � 7.�.46 in3 <br /> Z� o� 4"x4" = 12 .545 inA <br /> Ca�ulat:ons: <br /> Beridirig Allowab�.e � 7.].46 X 13a0 = 9289.8 in-lb� <br /> Max 1.oad m�mb��r s��ll carry � <br /> W=MB/1 � {9289.8 x B)/�5 x 1� ) � 1.238. 6 }.bs <br /> � 1�38 .6 ibs/areatP93) f 1238.6/12.38 14o�s_f <br /> Shear Allawable = (2A .5 in2 x 75 lb/in�)/3 �- 512.5 �.bs <br /> Max load tn�mber yill carry � <br /> W�V x 2 � b12 .5 x 2 = }.225 lbs <br /> 1225 lbs/area � liZS/12. 38 sf $ 98.9 �� <br /> D�eflect A2io�aab�.e = t 5 x 12)/2�4 � ,25 in <br /> M8x 108d �'n�;rib�r w.il Car�Zy � - <br /> W�tA)384f�� iY)/Sw]. � <br /> 1 , 25) (384} :1,100�04Q1 (1.2 . 505!/(5 } t�x �)3 = <br /> i222.7 lbslarea = 1222. �/12.38 �f � 8.7�' sf <br /> Of the abov�, Defle�tiar� wi}.1 gavezn when deCerm�,ning am unt of ' <br /> a�Sowable lo�d me�b�r wi?1 �arry. Allo�able l.aad a 4"x4' wi�h <br /> the cre�perty chazacreris�3.cs given on pq.2 is �qual to 9 .�? <br /> �bs/sf <br /> 98. ?7 lbs/s� tctal lcad, less 5.6 15/sf dead lodd 4pg•:.) equals <br /> 93 .3? lbs/s� live lo�d allowab�e fsnow ar wind} <br /> Na�e: Net uplifx due to s�ind is less than dead 1�oad and ive load <br /> combined. Th�refore rafter bending due to w3nd upls�t i not <br /> crf.tical. . <br /> �� �0'��"' ^` <br /> ', �� _�� �10. �°t1�y7 <br /> ��� . �, ��,�3 <br /> pa9� 5 ' <br /> �;... <br /> , . . _ <br />