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Trus Joist•Microllam�LVL • Specifier's Guide 2020•Juty 2002 <br /> ��i.� �' i!t.' . .c,l„:� <br /> � lT <br /> 13/a" Width Piecer. - � �,j��f1r <br /> � <br /> • Mi�imum of 2 rows 12d(3�14")common nails at 12" on-centec '�V=�::< , " <br /> � <br /> • Minimum of 3 rows 12d(3�14"�common nails at 12" on-center for <br /> 14", 16', 18° and 20" beamz. <br /> • Nailed connections require an additional row of nails when nail � <br /> size is smaller than zpecified above(minimum OJ28"x 3"). f - <br /> m`!� . - - _ <br /> _ � '�': <br /> � Multiple pieces of Micro(lam�LVL can be naited or bolted <br /> together to form a header or beam of the required size, <br /> up to a mauimum width of 7" <br /> i - i � - � � � � � r <br /> Assembly A Assembiy B Assembly C <br /> Z�7G5.�3I�� �✓�JGS.�3I4� �}pGS.�3�4� <br /> i <br /> 2" �y;�� 2��� e d 5` <br /> t: : <br /> ;4 ' J':.i .-��a <br /> k <br /> � ��• <br /> ' — — <br /> �J 2"� 2„� <br /> � <br /> 1;4 <br /> Ma�cimum Uniform Load Applied to Either Outside Member tPLF) Example Problem <br /> -iJailed Connection�U(21 Throu h-Bolted Conne�tion(31 Structural Wood Screw Connection�41< <br /> Mu[tiple , , <br /> ��2Rows 1Zd 3 Rows 72d <br /> Azsembly 2 Row:�/z" 2 Rows�/z" 2 Rowi 2 Rows , ' <br /> (0:148 x3_25") (0.148"x 3.25") 300 PLF <br /> (see Bolts Bolts 1la x 3�/z Screw �l�"x 3�/z Screw �i 430 PLF <br /> Common Wire Common Wire � � <br /> p��+ps� at 24"o.c_ at 12':o c '- at 24 o,c at i 2 o'c . ° <br /> - ,zt 1Z R:c. ' at i1,o.c_ , t.�, �1 � <br /> s: � • �`��s <br /> A 470 705 505 1015 500 995 ' ( ,� <br /> 8 355 530 380 760 375 , 745 4 - <br /> �.: <br /> C ' 340 680 330(s) 665�51 - <br /> (t)NAILED CONNECf10N values may be doubled for 6"oo-center or tripled for 4"on-center naii spacing. <br /> (2)NAIIED CONNECTION values require an addiUonal row o(nails when nail size is tmalier than specified above(minimum 0.128'x 3"). �A'�� <br /> (3)A307 boltr with washers�equired.Bol[holes to be 9/i6'maaimum. <br /> (4)Screws must have sdf-drilling tip and minimum bending yield strength of 217,000 psi.Lead holes may be required by local building official. Solution: <br /> (5)6"screws required. FIfSt, check allowable load tables to verify <br /> that 3 pcs.can carry the total load of <br /> 730 plf with proper live load deflection <br /> General Notes criteria.Maximum load applied to either <br /> outride member is 430 pif.For a 3 pc. <br /> - Verify adequacy of beam in uniform load tables on pages 8-13. 13/a" multiple assembly,2 rows'12d <br /> • Va(ues listed are for 100%stress level. Increase 15%for snow-loaded roof conditions (3�/a"�nails at 12" omcenter is good for <br /> or 25%for non-snow roof conditions,where code ailows. only 355 plf.Therefore,use 3 rows 12d <br /> (3�/9")nails at 12" on-center(good for <br /> • Use specific gravity of 0.5 when designing connections. 530 plf).Alternates:2 rowz�Jz" boltr or <br /> % • Beams wider than 7" require special consideration by the design professional. �/a"x 3�J2"screws at 12" on-center. <br /> • Connections are based on NDS�'�1997. <br />