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Home My WebLink Abouthardcover calcs - 5/1998 �,�.'' �� _ '�r , ,�r. , r1�� r ,- -�� ry- f ('l �`��'�" !�) r^ � �� -, .. � HARDCOVER CALCULATION WORKSHEET SETBACK ZONE: (CIRCLE ONE) 0-75' 75-250' 250-5�0' S00-1000' EXISTING HARDCOVER IN ZONE A. House ` � X = �. , S.F. Length W'idth � � � , , ,, x — � S.F. � �� — -� X = - _ _ S.F. X = S.F. B. Garage x = S.F. C. Driveway x = S.F. x = S.F. D. Sidewalk x - = i — S.F. x = � S.F. �� E. Patio/Deck x = S.F. ;, .-, x = S.F. F. Landscape x = S.F. Underlain x = S.F. By Plastic x = S.F. G. Other x = S.F. TOTAL HARDCOVER IN ZONE - S.F. A TOTAL PROPERI'Y AREA IN ZONE - S.F. B A — B x 100 = % PROPOSED HARDCOVER IN 'LONE A. House x = S.F. Length W idth X = S.F. X = S.F. x = S.F. B. Garage x = S.F. C. Driveway x = � S.F. x = S.F. D. Sidewalk x = S.F. � ` X = S.F. E. Patio/Deck x = S.F. x = S.F. F. Landscape x = S.F. Underlain x = S.F. By Plastic x = S.F. G. Other x = ' S.F. TOTAL HARDCOVER IN ZONE - S.F. A TOTAL PROPERTY AREA IN ZONE - S.F. B A — B x 100 = qo 13 � o� i; O _, � O �, �,�� ,j:;�;�f�:�. .-_ ,� ;� �I�'Y of �RONO ��\� } � / Municipal Offices ,,r�,, �� , .-_ \ ,/ �� `�,� � ,-�-?, :`�` �-;�G Street Address: Mailing Address: � '9$�Hp4' 2150 Kelley Parkway P.O. Box 66 Orono, MN 55356 Crystal Bay, MN 55323-0066 HARDCOVER ORDINANCE - In 1975, the Orono City Council adopted an ordinance limiting the percentage of lot area that can be covered with impervious surface ("hardcover") such as roofs, driveways, sidewalks, etc. on properties located within 1,000 feet of a lake. Studies have shown that sediments, oils, and debris camed into the lake from highly urbanized areas have a detrimental impact on the quality of water in the lake. The intent of Orono's ordinance is to ensure that rainfall run-off �vill be cleansed by filtering throu�h grassed or vegetated yard areas before entering the lake. Hardcover Zones - Allowed Percentages: 0-75 0% 75-250' 25% 250-500' 30% 500-1000' 35% Hardcover includes: - Roofs - Sidewalks - Paved or gra��el driveways - Patios & decks (includes slatted decks) - Tops of retaining �valls & rock walls - Decorative landscape areas underlain by plastic sheeting or fabric - Any other surface that does not allow direct absorption of rainfall into the ground , INSTRUCTIONS FOR COMPLETING HARDCOVER CALCULATION WORKSHEET l. Circle �vhich setback zone (0-75', 75-250', etc.) the calculation is for. 2. For each item of hardcover within that zone, enter the length and ��vidth, and multiply to get square footage (s.f.). 3. Add up all the square footages to get total square footage of hardcover. 4. Divide by the total area of property within the zone and multiply by 100 to get percentage of hardcover in the zone. 5. If changes in hardcover are proposed, you should do a "before" worksheet and "after ��orksheet. If either results in percentages greater than those allowed, contact City staff before proceeding with your project planning! Telephone (612) 473-7357 • FAX 473-0510 12 ENERGY CODE DESIGN BY ACCEPTABLE PRACTICE To Determine Compliance with the Minnesota Energy Code (Section 602 of the State Amended 1983 Model Energy Code) This form is only applicable to detached one-and two-family dwellings. The requirements herein are based on Table No. 6-11 in lieu of the criteria specified in Sections 602.2.1, .2 and .3. Building Address Contractor or Owner Buildins Element "R" Values Area (sq ft) % of Ext. Walls Ceilings Design Req'd 38 Walls (exterior) Design Req'd 20 (w/o fdn) Floors (over unheated spaces) Design Req'd 20 *Windows (in bldgs w/o Design Req'd 12 sliding glass door) (glass) *Windows (in bldgs with a Design Req'd 10 slidins 21ass door) (glass) Foundation Walls Design Req'd 5 (when insulating full depth of foundation wall) Design Req'd 10 (when insulating only to frost depth and footings extend below) Slab-on-grade floors Design Req'd _ (See Figure No. 3) **Doors (1-3/4" metal faced) Design - ' Req'd 3 * All windows shall be double glazed or have storm windows ** Conventional doors other than metal require a storm door CERTIFICATION I hereby certify that I have completed the above information and that it complies with the Minnesota State Energy Code. Signature . . Date ' � BCSD 3-89 CC/SM/6593 19 GUIDELINE TO (R) FACTORS FROM ASHRAE MANUAL OF TYPICALLY USED PRODUCTS AIR FILMS � SHEATHING � Interior Air Film (Walls) 0.68 3/4" Wood Subfloor or Sheathing 0.94 Exterior Air Film (Walls 0.17 1/2" Plywood Sheathing 0.62 Interior Air Film (Vented Ceiling) 0.61 1/2" Particle Board 0.66 Exterior Air Film(Vented Ceiling) 0.61 Gypsum or Plaster Board 3/8" 0.32 Interior Air Film (Non Vented) 0.61 Gypsum or Plaster Board 1/2" 0.45 Exterior Air Film (Non Vented) 0.17 Gypsum or Plaster Board 5/8" 0.56 Plywood 3/8" 0.47 BLOWING WOOLS Plywood 1/2" 0.62 Approx. 3" 9.00 Plywood 3/4" 0.93 Approx. 4 1/2" 13.00 Sheathing, Reg. Density 1/2" 1.32 Approx. 6 1/4" 19.00 Sheathing, Reg. Density 25/32" 2.06 Approx. 7 1/4" 24.00 Nail-Base Sheathing 1/2" 1.14 Approx. 14" 30.00 Approx. 18" 40.00 ROOFS All other insulation materials Built-up Roofs 0.33 must be verified (R Factor) Asbestos-Cement Shingles 0.21 Asphalt Roll Roofing 0.13 INSULATION Asphalt Shingles 0.44 Insulation: 2-2 3/4" Fiberglass 7.00 Insulation: 3 1/2" Fiberglass 11.00 SIDING Insulation" 6" Fiberglass 19.00 Aluminum Siding 0.61 Insulation: 3 5/8: Fiberglass 13.00 Aluminum with Backer 1.82 Insulation: 9" Fiberglass 30.00 Aluminum with Backer & Foiled 2.96 Insulation: 12" Fiberglass 38.00 1/2 x 8 Lap Siding (Wood) 0.81 Insulation: 8" Cellulose 29.00 7/16 x 12 Hardboard Siding 0.67 Insulation: 10" Ceilulose 37.00 Asbestos Sidings 1/4 Lapped 0.21 Insulation: 12" Cellulose 44.00 Stucco (Brown and Finish Coat) ---- Insulation: 1 1/2" Therma�c 12.00 Insulation: 2" ThermaJc 16.00 DOORS � 1 3/4" Solid Core Door .46 WOODS w/Storm, Wood .31 Fir, Pine & Similar Soft Woods w/Storm, Metal •26 1 1/2" 1.89 Pease Steel Door Insl/N/GL 7.45R .13 2 1/2�� 3.12 Sliding Glass Door, Wood .65 3 1/2" 4.35 Metal •72 5 1/2" 6.87 WINDOWS CONCRETE BLOCK All Windows 8" Concrete Block (S & G Reg.) 1.11 (w/Storms 1" to 4" Space) .56 (Filled with Vernuculite) 1.93 Removal Double Glazing (RDG) .55 12" Concrete Block (S & G Reg.) 1.28 Thermo or Welded 3/16"Air Space .69 (Filled with Vemuculite) 3.15 1/4" Air Space .65 8" Light Weight 2.18 1/2" Air Space •58 (Filled with Vemuculite7 5.03 (Other windows specifically tested 12" Light Weight 2.48 can use better ratings) (Filled with Vermiculite) 5.82 20 — • CONSTRUCTIO'� R VALUE WALL FRAHI`{G SECTfON: - 1 Interior air film 0.6R . 2 3 (nches sofc wood ;� 4 - �� 5 —{f, Exterior air fil �• 17 ' . TOTAL R i U = 1/R - - 1�ALL SECTION ( INSULATED) - 1 Interior air f11m �.�R 2 3 4 � 5 ' f+ Exterior af r fi lm �• 17 TOTAL R � U = 1/R3 , RIH JOIST SECTIOtl: ' 1 Interiot- air film �.�'R . 2 - 3 � �s 4 _ _ � � n. 17 b Exterior ai r t`i ln , , iOTAL R = . .. � FOUNDATION INSULATIOPI REQUIRED: u � �/R = . Min. R-5 on entire wall OR p�p ,, ,o. Mi n. R-10 down to frost depth � . , _ ,.,,�a: FOUNDATIOt� SECTION: n �� e:--. •� 1 lnterior af r ftlm , :� 'P . � Z ' 'J ': 6_ :: 3 n. t7 ', •,a = 4 Exterior air fiim a • a' '•' GRA � (S • •.,C,• : Q '��-4 ��`` �'� �� TOTAL R a �• .•>� . U = 1/R = � SLAB ON GRADE . , , ,. . .,'v,• ; "4 �� ,' `i• •- - 4`' Q,� ;a,°' . . , .1 f � �, r' . r ._ • . a'.: ` ;, " - . � � ` -'d �_. :- � ,a,.• � . ', . , ; A � ; � � .' ' _ Q, �• '•, , ;. - '�- ) • ,p . . � ,;.i:'. a d , J..- � •Q � '� ,•�.,Q ,a` �► t �� / ;�,�� ' � •l i � � � .• � � �;4, . . •• u•�G• � % , �� , :'q. ..• u �• � •�.i� �� , _ � % d . - ' Heated Slabs: ' �- '• ' � . . . . � . . ..� � , . . , � . ., ,.. �tinim�rn R - 8.5 , , 4 . . , � ' �� 4 • � � � � ' u ' � ' d` . . . , , � � ) 9 � -• • . ' . '. _.4. U�nheated S 1 abs • ' q 4 �' • ,Q � � .. , , -� ; -, 6.2 . . ' � ' .' �v � , Minimum R = � d• • � Q, ,� �j ` ,4� • - ' - a,�r� � ' ,�. ,;a, ,�,.�.,�' 4.,, 17 CONSTRUCTION R VALUC� ' CEfLI�lG SECT10�� (It�SULATED) : � � Incerior air film C).F,1 � 2 . � 3 S;� 3 4 4 Exterio� air f( ln (s[ ill ) �.�1 TOTAL R = U = t/R � t / CEILING FRAHING SECTION: ( 2 5 1 Interior air f11m �.�1 . 2 q�R VENTED 4 Interior air film sCill �. 1 FLOW 5 inches sor t woo�i TOTAL R � ' U = t/R = � • ' . CEILItlG SECTiOF! (IhlSULATED) : —,,,, y��.,,��'��y.;.g��,��'�� 1' I n te r i or a i r f i 1 m � �.F 1 —i 2 � � 3 .. 4 Fxterior air film stil ) �• 1 TOTAL R = � �� U = 1/R = / }• � . 2 3 4 5 CEILlNr, FRAH1�1l; SECTIO�a: 1• Interior air film �•�1 VENTED 2 � 3 4 Exterior air film �still �• 1 . � 5 1Rches soft wood TOTAL R = . U = i/R = 3 4 5 � , L >: ��:. •�� .` _ ':��:==Y` '". ',.,� 1 tnside air film �.�'1 := —`'�� - % 3 ' � . � 4 � S Outside air film �• �� I 2 . TOTAL R - � , U � 1JR = ,L — 18