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• . � <br /> ! � <br /> `�.��'�� DcCKS - S�1I�r�LE CALCULAT I0�1S FOR US I�iG T�it S PAt�( '!ABLE � i <br /> - . • � <br /> a� C�se � Solu�ion: Refer to �able for joist and be�m siZes. <br /> ' Exanple: a = l2', Post Spacing = 8' .. • . <br /> • P.efer to the span table. Joist size �ay be either.. 2xfi's 12" G.C. <br /> _ . or 2x10's lb" O,C. Beam size may 3e either 3=2x8'x or� <br /> . . � : 2-2x10'.s: . . : � . . : . . :- . � � . � . " .. <br /> � . � � Case II Solution: �• Use."a" i0C' JO15�`. SiZ2 2f1Cf .��Z'r T '°b" �p • <br /> � deternine beam size (The iength o� "b" is res�ric�ed by � ! <br /> z I b both the length o` "a" and ths size o` the joists) . ! <br /> cxz�ple: a.= 8' ,. b = 2' , Pos� Spacing = 10' � � <br /> �ind the jaist size requir2d by looking ur�der 8' on the . <br /> � ' �able. Joist lenath is ir�icate� as 2xb's 76" O.C. or _ <br /> Zx8's 24" O.C. ror s�zir,; 'tne bea^, use a joist ieng�h o� � <br /> ! - 10' (E' � 2` = 10' ) an� a �o�t spacing o` 10' . ihe tab i e � <br /> . • indicates that 4-2x8`s ar 3-2x1Q's are r�quire� ►or th,e b_ar�. ± <br /> i <br /> -. � <br /> . Case. III Solutio;�: Use "a" ar "b" , whichever .is greater, to i <br /> determine JO15� S1ZE. US� "d" i•"b° �0 det�rr►ine Lh2 51io i <br /> -- . o� Seza Pio. 1 ar,d use joist ler�t� "�" to deter;�ir�e the � <br /> a � b s i Ze of �Bean No. .2. ., <br /> I �xanple: � = 6' , b = 7' , Post Spacing = 9 ,. <br /> � . • <br /> —� —� 7h� joist leneth (7' } is detn ,�,ine� `y �he longesL span ;;:,is� <br /> � - ("b"). ihe table indicates tr�t 2x6`s 16" Q,C, ar 2xo's 2�" C.C. <br /> zre req�ired for a 7' sp�n. For 8��:�� No. 1 , use ;oist ie�g�� <br /> 3��::� i 8e�n Z or 13� (6� = 7! = 13 ') ar,d �osL spacing of 9` . Th� �abl? <br /> � � ; indicates that 3-2x10's cr 2-2x12's are reqccired for Bear P{�. i . <br /> �or 6ez� rlo. 2 �se joist length of 7' with a post •spae�nj of <br /> 9'.� ihe table indicates tF��t 4-2x6's cr 3-2x8's are <br /> required for Bean No. 2. _ <br /> • �cSe TY SO�Il�1011: �SE '�2" 01' "�j", W[11ChoVe:' 15 gre�ter, t0 <br /> � de=ernine joist siz?. Us� "a" - "b" to deternine ti:e si>p � <br /> � . af Beam Ho. 1 and "�"• + "c" t� detenine the•size oT �e�n r+o.� 2. <br /> ' (Ti;e leng�h .af "c" is restrict�d by botn t�a length aT "5" � <br /> and the size of the joist). <br /> a ( b f c • . <br /> � � � "cxa;�ple: a = 7', 5 = 8',� c = 2' , Fost Spacing� = 12' � <br /> .. ; <br /> - ►he longest joist span is 2`; :here�ore, the table indica�es <br /> that 2x6`s 16" O.C, or 2x8`s 24" O.C. are required. For � � <br /> Ho. 1 F�o. 2 8ean Ho. 1 , use jois� lery�f� of TS' (7' � E' = 15') and <br /> 3ez�� °ea.z� pos� spacing o►` 12' . 7he t�ble indicat�s that 3-2x12`s a�e <br /> reGuired for Bear t�o. 1 . :or 3aam tt�. Z,-��use joist lengt�� o� <br /> . • � IO` (8' � 2' = 10' ) and post spacing or 12` . The table <br /> . , �ndicates that 3-2x10's cr 3-2x12's ar.e required. for . <br /> ' . Sean t{o. 2. • - • • � • <br /> HOTES: Post size must be adequate to provide fuii•beam bearing, ie. ,'one-member' and � <br /> two-me�ber beams u�ust be placed on a 4x4 post, three-nember beans must be� <br /> p1ac�J on 4xb or 6x6 posts, and four-m�ber bearas must be placed on Sx8 posts. <br /> • - �= . . ,. . . . <br /> Most af the boxes in this tabl'e contain two optiona] means of .support, Wood.. <br /> me�bers may be increased above those indicated in� the table, but in no event <br /> may Tesser menbers be �sed. <br />