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� � a <br /> � �`' '"-_�'.tx'=;,'z; ai� �; r'�'"'�"1� � � �� , <br /> ���f����� . � r. ��a;���r��� ��� ��°����r���.��������� � <br /> .:�_,� <br /> .,;_«�:.��..T-� _. ��:.�. n_. re_ . ��� , . . _ � <br /> Screw(purlin)Spacing Panel 1a detail <br /> �, 12 inch 18 inch 24 inch 30'rnch :r, <br /> b 5Q 780 143 95 76 '{,: Lap Srre� �pplsT seaia�it <br /> � i0p 38Q 285 190 152 :'��� �``� to lap <br /> 0 200 760 57Q 38p 304 ;" overtap <br /> .� 3Ct0 1140 $55 57f� 456 'r, ~�—► <br /> � 400 152q 1140 760 608 ' 1 - <br /> � �nv �soo iaa� s�o 7sa �'; � d�cking <br /> p, 600 2280 1710 1140 912 �c purlin-bearing leg � <br /> 0 700 2660 1995 1330 1064 :,:� <br /> � $00 3040 2280 1520 '1216 �: <br /> � 900 3420 2565 1710 1368 x�;� Figure 6 On roofs with less than 3/12 pitch, lap <br /> � 100Q 3800 285Q 1900 '1520 �_ screws and butyl tape {or appraved roo#ing <br /> � i10 4'180 3'135 2090 1672 .� sealant) must be applied at the panel lap to keep <br /> 120 456Q 3420 2280 1824 : water from overflowing the lap. Note that the <br /> Figure 5�P8R.panel screw afculation chart`" under/ap side of the panel has a distinct purlin- <br /> bearing leg that rests on the roof decking. <br /> �Iow to Figure and Apgly Screws <br /> Gulf Coast Supply carries screws in 3 different lengths: 1 inch, 1'/z inch, and 21/z inch. 1-inch screws will <br /> 6arely penetrate a 1x4,but the li/z inch are the best all-purpose size. 2t1a-inch wood screws or self- <br /> drilling lap screws are necessary far attaching ridge caps. The above table (Figure 6) can be used ta <br /> figure approximate quantities of screws for variaus purlin spacings and sizes of raafs. Far 2-foot spacing <br /> between rows of screws, rnultiply the total linear feet of inetal times 2. <br /> Example: your order is 1250 feet of PBR raofing. 1250 x 2=2500 screws <br /> Flease confirm all estimates with your Gulf Coast representative when you place your order. <br /> Codes allow re-raofing over shingles without the use of battens providing the roof has been checked <br /> by a licensed roofing contractor to insure levelness and pullont integrity. <br /> PBR°metal raofmg can be separated fram the moisture barrier by minimum,nominal l"x 3" yellow <br /> pine battens spaced on maximum 24" centers, or accozding ta ASCE calculations where applicable. Since <br /> direct cantact between pressare treated lu�mber and ametal raofing must be avoideci in order to <br /> prevent potential corrosion, Gulf Coast Supply sells only untreated battens. <br /> CAUTIC}N: Battens mast be fastened to the roof deck with minimum#6 screws at 12" on-center,ar <br /> two minimuzn 8d coxnmon or pneumatic nails spaced 8" on-center, or one every 4" on-center(or by <br /> appiicab�e catculations according to ASCE'7-98). ��ttens must be instalted to support the entire width <br /> a�nd length of ridge,eave,hip, valley, and gable-end trims. <br /> Far solid decking, at least i/z-inch structurai plywood {5I8'" for Metro-Dade new eanstruetion and for <br /> any high velocity wind zone of 120 and above) supported on rafters at a znaximum of 24" on center is <br /> required. In residential applicatians,buiiding codes require a plywood deek with the use of#34 felt to <br /> provide adequate thermal and moisture barrier pratection. <br /> If care is taken,metal raafing app2ication can be aided by pre-drilling paneis,allawing screws to go <br /> quickly and accurately into the desired spacing. Pre-drilling will work provided that pilot holes are placed <br /> accuratelv in the proper locatians on panels. Purlin spacing must be uniform and carefuily measu�red. <br /> (352) 498-0778 s Toll Free (��8) 393-0335 • FAX (352) 498-7852 <br /> - 6 - <br />