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- �rr ���� y , a� 1„��Jj - � � -�� � = ,a� <br /> � • ,���� _ � � , � � �� � ���j , . � w <br /> ��oo� D�c�s - sa�ap�E ca�cu�aT I a„S Fo� US i ��G i hE SPaN i�BLE � � � <br /> Czse I Solu'ion' �eter L`u �able �or joist anc bear�� s iza5 . <br /> �"�� ' ` <br /> n <br /> Exzrple: a = 1Z' , �os� Spacing = 8' <br /> �efer to the span table. �oist size ��Y be �ithnr. 2x5' s 12" C.C. <br /> or 2z1o's i6" U.C. Beam siz� n2y 5e either 3-2x8'x or <br /> � � � <br /> �-Zz10' e <br /> � „ , ��ti�� <br /> ��s2 � i Solut;on: l.'se "�" `ar ,;ois� size znd ' � - � �o <br /> � d��enine oe�� siz� tT;e 1 �ncin a� "5" is res�rictA7 5y <br /> � i b � bcth �he lengt� o� "a" ar.d �h2 stz° o� th� joists) . <br /> I ' � <br /> � �xz�ple: a = 8' , b = 2' . Pcs: Spac�ng = 10' <br /> � -ir.d the jois� si'e re�ui�-'� b/ looking under $' an ch� <br /> ; �_ble. Joist lerat}� is indiczted 'S 2xo' s l6" U.C. or <br /> � <x2' S 24�� O.C, rar S � Z1�C ���� bean, u52 ' �015i. i ength O' <br /> i I 10' (8' y Z' S 10' ) and z fos� SpdCing o,` 10' . The tablz <br /> i n�ica ce s that 4-2x3 ' � ��T� '-2x10' S are r2qui red `or `he be?r,. <br /> C�Se IiI Solutio�: Use "a" or "b" , whic!�ever is ar-Patzr, to <br /> decer,ine jois � size . Use "a" l "b" to de[err,mine the size <br /> o�- eez� �lo. 1 ar;d us� jois� l �ngth "�" to det�r��tine the <br /> a I b size o; 8eam No. 2. " <br /> � c"xzmple' a = b' , b - ' ' , Pos� Spacing = 9 ` <br /> i <br /> � T5e joist length (7 ' ) is det�r-�ined by `he longest Span joiS� <br /> � ("b"). ihe table indicates tha;. 2xo's 16" O.C. or 2X8 ' s 2�" O.C, <br /> zre requir-ed �or a 7 ' sp�n. For Bez:� No . 1 , ��se �ois : length <br /> 3=_a� 1 � ?e�m 2� p; 13 ' (6' � 7 ! = 13 ' ) and pns� spacing of 9' . Th2 �dblp <br /> � ; indicates th�t 3-2x10' s or 2-2x1Z'S are required for BEdm N0 . 1 • <br /> ' For Beam ho. 2 use joist length of 7 ' wit}� a �past �spaE�ng oT <br /> 9 ' , The table indicet�s th1t 4 �2x6`s or 3-2x8' s are <br /> required for Beam No. 2. , -- <br /> l.�Se ?� �oluLion: Usz "c-'�� dr' ���J�� , wnichever 15 �1"2�te1' � t� <br /> de:e�ine ;;oisL size. Us� "�" = "b" to eeterr�ine the ; i=� <br /> of 8ezm yo. 1 and "�" _ "c" �o deter�ine the siz� oT �ezm NQ . 2. <br /> (ii;e leng�h of "c" is restric�ed by both th_ lengLh o� "h" <br /> and the size of �he jo1st) . <br /> a b i c <br /> � cx��ple: a = 7' , 5 = 8 ' , c - Z' , Pos� Spacing = 12' <br /> � +ne longes� jois� span is 2 ' ; �her�rcr� , the table indicdte5 <br /> thet 2�c6's 16" U.C. or 2x8'S 24" O.C. aro requirad . For <br /> ;fo, }� iNo. 2 8eam t�o. 1 , use ���sL lenath Ot' 15 ' (7 ' t 8 ' - 15 ' ) and <br /> �eam Beam post ;p�cir�g a� 12' . The t�bie indicat�s thet 3-2x12 ' S ��2 <br /> requ5rcd ror Bezr,. ho. l . �or �ean t{o_ 2, use jOiS� length of <br /> ]0' (8` � Z' _ ]0' ) and post spacing or' 12' . The table <br /> indicates that 3-2x10's cr 3-2x12's ar.e reqccired for <br /> . Beam No_ 2. � <br /> NOTES : Post size must be adequate to provide full beam 6eari�g , ie. , �one-memb�r� and <br /> txo-member beams must be placecl on a 4x4 post, t�,�'�ree-m�nber beams must be � . <br /> placeC on Qx6 or 6x6 posts� and four-member bez�ns must be placed Ofl Sx8 pOStS - <br /> Most of the boxes in this tabl�e contain trro optional means Of .support- WoOd_. <br /> m�nbers may be increased above those indicated in- the table, but in n0 event. <br /> +�e.� � nrinr �-,K.,hnrc hG 1}GP•_1 . <br /> ?eGt LS�G-�Lb-ZI9 ONO�lO �0 J,lI� �Hl S��SI� S5iG1�iSf� <br />