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HomeMy WebLinkAboutCALCULATIONSf Yi+ Pit'DITION RE' aED p Y k ■ St Lg Pou JGener I o I S stemse those methods of a licat'on where Sase Sheet is mee apical;. ache or self adhered to the decking. The Cap Sheet shall be attached by of As hal , Cold Process, Heat Applied, Self Adhered or Mechanically Attached. Minimum thickness shall be 40 mil SBS, APP or approved equal. ase lie Base heet shall be self adhered or mec aally attaeSed o the de - J an t n tags round cap nails or other ap roved .fasteners spaced i M a ee with t • e�r'riilorlayment-astenin gab a IPage 13 -ATp-en-ai-RAT.-auend the Base Sheet a minimum of 4" up ver- tical surfaces. Base Sheet side laps shall be a minimum of 6" and head laps shall be a minimum of 2 . Install the Base Sheet to ensure all valleys are woven past the centerline and through the succeeding course of underlayment on the inter- secting deck to prevent a water lap. Ensure that each course of underlayment is overlapped by the succeeding course at the intersecting roof plane. Proceed up the roof to the ridge. Overlap hip and ridges a minimum of 6". Drip Edge - The Eave and Gable Drip.Edge metal shall be installed over the Base Sheet. The metal shall be coated with compatible primer prior to the Cap Sheet being installed. The metal shall be fastened 6" on center with approved fas- teners. All joints shall be lapped a minimum of 3 and sealed with compatible flashing cement, beads of sealant or solid coating at the lap: Continue from eave up the rake/gable in the same manner, ensuring water shedding capabilities of all metal laps. ■ Since Raised Fascia and Starter Strips create the same type of 1 ' water dam situation, they both require an Anti-Ponding System to allow water to flow off the roof at the eave. See ■ Drawing FHW-1 1. s Cap Sheet - The two-ply underlayment flashing options �- determines the Cap Sheet Installation timing. Choose one of the following and proceed accordingly. 0 Under the Cap Sheet. See Metal Installation. See ■ Drawing FHW-02B • On Top of the Cap Sheet. Proceed to the next sec- tion. See Drawing FHW 02C Can Sheet Installation - Side laps shall be a minimum of 6", plane. Over lap all hip and ridges by 6". On Cap Sheet, cut any fishmouths and seal with flashing cement and membrane where applicable. When using Pre -formed Metals without edge returns, the Cap Sheet should terminate I" from the water diverter to ensure adhesion to the primed metal. Cap Sheet Attachment Method - Choose one of the fol- lowing. • }-lot As hp alt4(A'stall the Cap Sheet with an application rate of 25 pounds per square ± 15% mopping of asphalt. The Cap Sheet may come in contact with the Base Sheet, allowing felt to touch felt. • Self Adhered -Over installed Base Sheet, apply one layer of Self Adhered Underlayment in compliance with the Self Adhered underlayment manufacturer's recom- mendation. • Cold Process - Install Cap Sheet according to underlay- ment/adhesive manufacturer's recommendations. For Cold Process Systems in windy conditions, it may be necessary to spot nail Cap Sheet laps at a maximum of 3' on center. • Heat Applied -'Install Cap Sheet per manufacturer's instructions. • Mechanical Attachment - Battens may be used with this application method. The Cap Sheet shall be back nailed to the Base Sheet with nails. and tin tags, round cap nails or, other approved fasteners to secure the Cap Sheet •until the battens can be installed. Windy condi- tions may require additional securement of the Cap Sheet at the overlaps. Valley Intersection - When installing the Cap Sheet at the valley intersection, choose one of the following installation methods. Be sure that the underlayment does not create a gap due to memory of the material. head laps shall be a minimum of 3" and back nailed 12" on center with approved fasteners. When using battens, back nailing the Cap Sheet is optional. Install Cap Sheet to ensure all valleys are woven past the centerline and through the suc- ceeding course of Cap Sheet on the intersecting deck to pre- vent a water lap. Ensure that each course of Cap Sheet is overlapped by the succeeding course at the intersecting roof Full Weave -Install underlayment to ensure all valleys are woven past the centerline and through the succeed- ing course of underlayment on the intersecting deck to prevent a water lap. Ensure that each course of under- layment is overlapped by the succeeding course at the intersecting roof plane. Proceed up the roof to the COPYRIGHT © FRSA/TILE ROOFING INSTITUTE April 2012 FRSA/TRI TABLE I Allowable Uplift Resistance for Anchor Sheet Attachment (DSf) 71, Wll 'IT ;;Oil A N""Ay 'M d AJF pu --p ig W Backnail 0"" 'Ell F i ld Lap Cap Sheet 15/32Inch- 19/32 inch 15)32 Inch 19/32 inch 15)32 Inch 19/32 inch Smooth Deformed 4 Smooth Deformed 4 Smooth Deformed 4 Smooth -Deformed Smooth Deformed 4 Smooth Deformed 4 6 12 41.6 47.4 52J 60.0 49.6 56.5 62.9 71.5 58.6 66.6 741 84.3 6 12 43.1 49.1 54.6 62.1 51.8 58.9 65.6 74.6 61.4 69.9 77.8 - 88.5 6 12 44.9 51.0 56.8 64.6 54.4 61.9 68.9 783 64.9 73.9 81.2 93.5 6- 7-1-2 47.0 53.5 59.5 67J 57.6 65.5 72.9 82.9 69.2 78J 87.6. 99.6- 6 12 49.6 56.5 62.9 713 61.5 70.0 78.0 88.6 74.4. 84.7 94.3 107.2 6 12 53.0 60.3 67.2 76.4 66.6 75.8 84A 96.0 813 92.4 102.9 117.0 6 12 57.6 65.5 72.9 82.9- -73.5 83.6 93.0 105.8 00.3 102.8 114A 130.1 dff 12 63.9 1111111 81.0 92.0 83.0 14.4 165.1 119.5 103.0 117.2 130.5 148.4 T 6 F735 . .. 836 930- 1 105.8 973 110.7 123.2 140.1 122.1 138.9 154.6 USA '12 89.3 101.6 113.2 1 128.6 121.1 1371 OTI53.4 - .174.4 1'53.9 .175.1 1 194.9 221.6 , and one row at the to ed a of the ca et" T--TFree rows staggered -,nere ff, one -row at the lap, and one row at the top edge of the cap sheet 3 - Three rows staggered in the field, one row at -the lap, and one row at the top edge of the cap sheet OWDeformed shank inclusive o� �Rrscrew-s �aflflyal& PA 1*- 7 I JAr P h ty y h Ft F RSA./TRI TABLE 2A Required Aerodynamic Uplift Moment For Field Tile, Ma (ft-lbf) For Roof Pitches 6: l2 'and La -cc Exposure B Basic Wind Speed in MPH MRH He,t,9, m 1 13.3 �/��( `.�i2a'Vr a",r5..(,„_ 15.6 )• q ! J,4fi* i?F �t A, k4a 30.0 . 33.4 0-15 18.1 20.8 23.7 26.8 20 13.3 15.6 18.1 20.8 23.7 26.8 30.0 33.4 25 13.3 15.6 18.1 20.8 23.7 26.8 30.0 33.4 34 13.3 15.6 ' 18.1 20.8 23. 26.8 30.0 33.4 35 13.9 16.3 18.9 21.7 24.7 27.9 31.3 34.9 40 14.5 17.0 19.7 22.6 25.7 29.1 32.6 36.3 45 14.9 17.4 20.2 23.2 26.4 29.8 33.4 37.2 50 I SA 1.8.1 21.0 24.1 27.4 31.0 . 34.7 38.7 55 15.8 18.6 21.5 24.7 28.1 31.7 35.6 39.6 60 16.2 , 19.0 22.0 . 25.3 28.8 32.5 .36.4 40.6 Exposure C Basic Wind Speed in MPH MRH?0�,€�0a o�2i q,( > S y vy X•_iTi t +y` 7^ J kA -M"Q. yd' v7} Arfn«NS �fl YM'r a41I�q 16.2 19.0 22:0 25.3 28.8 32.5 36.4 40.6 0-15 20 17.1 20.1 23.3 26.8 30.5 34.4 38.6 ' 43.0 25 .17.9 21.0 24.4 28.0 31.8 35.9. 40.3 44.9 30 18.7 21.9 25.4 29.2 33.2 37.5 42.0 46.8 35 19.2 22.6 26.2 30.1 ' 34.2 38.6 43.3 48.2 40 19.8 212 27.0 30.9 35.2 39.8 44.6 49.7 45 20.2 23.7 27.5 31.5 35.9 403 45.4 '50.6 50 20.8 24.4 28.3 32.4. 36.9 41.7 46.7 52.0 55 21.1 24.8 28.8 33.0 37.6. 42.4 47.6 53.0 60 21.5 25.3 -29.3 33.6 38.3 1 43.2 48.4 T 54.6 Exposure D Basic Wind Speed in MPH MRH a•c ?� ! i'1��� C a Pa I�r�u73k"` '% (/■�x'' -� .� pryE� �'"� r `+�'v d=sm �+■A�■rtk .st Al.,id�; 0-15 19.6 23.0 26.7 30.7 34.9 39.4 44. I 49.2 20 20.6 24.1 28.0 32.1 36.6 41.3 46.2 51.6 25 21.3 25.0. 29.0 33.3 37.9 42.8 48.0 53.5 30 22.1 25.9 30.1 34.5 • 39.3 44.3 49.7 55.4 35 22.7 26.6 30.8 35.4 40.3 45.5 51.0 ' 56.8 40 23.2 27.3 31.6 36.3 41 ..3 46.6 52.2 58.3 45 23.8 27.9 32.4 37.2 42.3 47.8 53.5 59.7 50 24.2 28.4 32.9 37.8 43.0 48.5 54.4 60.6 55 1 24.6 1 28.8 33.4 38.4 43.7 49.3 55.2 61.6 60 1 24.9 1215k 1 1 39.0 .44.4 1 50.1 56.1 62.5 • •••� _jWww .a I= Nn� .wa,c -, v for rvom1nal a - second gust at 33 ft above ground. MRH= Mean Roof Height in Feet For Roof Pitches 6: l2 and Less Equates to Roof Slopes 7 deg s (0s 27 deg for Zone 3 For Tile Calculations COPYRIGHT © FRSAmLE ROOFING INSTITUTE _ April 2012