TABLE R-11
RAFTERS WITH L/240 DEFLECTION LIMITATION
DESIGN CRITERIA:
Strength - Live Load of 40 psf plus
Dead Load of 20 psf determines the required bending design value.
Deflection - For 40 psf live load.
Note: The required modulus of elasticity, E, in 1,000,000 pounds per square inch is shown at the bottom of each table, is limited to 2.6 million psi and less, and is applicable to all lumber sizes shown. Spans are shown in feet-inches and are limited to 26‵ and less. Check sources of supply for availability of lumber in lengths greater than 20‵.
TABLE R-14
RAFTERS WITH L/180 DEFLECTION LIMITATION
DESIGN CRITERIA:
Strength - Live Load of 30 psf plus
Dead Load of 10 psf determines the required bending design value.
Deflection - For 30 psf live load.
Note: The required modulus of elasticity, E, in 1,000,000 pounds per square inch is shown at the bottom of each table, is limited to 2.6 million psi and less, and is applicable to all lumber sizes shown. Spans are shown in feet-inches and are limited to 26‵ and less. Check sources of supply for availability of lumber in lengths greater than 20‵.
TABLE R-15
RAFTERS WITH L/180 DEFLECTION LIMITATION
DESIGN CRITERIA:
Strength - Live Load of 40 psf plus
Dead Load of 10 psf determines the required bending design value.
Deflection - For 40 psf live load.
Note: The required modulus of elasticity, E, in 1,000,000 pounds per square inch is shown at the bottom of each table, is limited to 2.6 million psi and less, and is applicable to all lumber sizes shown. Spans are shown in feet-inches and are limited to 26‵ and less. Check sources of supply for availability of lumber in lengths greater than 20‵.
TABLE R-22
RAFTERS WITH L/180 DEFLECTION LIMITATION
DESIGN CRITERIA:
Strength - Live Load of 30 psf plus
Dead Load of 20 psf determines the required bending design value.
Deflection - For 30 psf live load.
Note: The required modulus of elasticity, E, in 1,000,000 pounds per square inch is shown at the bottom of each table, is limited to 2.6 million psi and less, and is applicable to all lumber sizes shown. Spans are shown in feet-inches and are limited to 26‵ and less. Check sources of supply for availability of lumber in lengths greater than 20‵.
TABLE R-23
RAFTERS WITH L/180 DEFLECTION LIMITATION
DESIGN CRITERIA:
Strength - Live Load of 40 psf plus
Dead Load of 20 psf determines the required bending design value.
Deflection - For 40 psf live load.
Note: The required modulus of elasticity, E, in 1,000,000 pounds per square inch is shown at the bottom of each table, is limited to 2.6 million psi and less, and is applicable to all lumber sizes shown. Spans are shown in feet-inches and are limited to 26‵ and less. Check sources of supply for availability of lumber in lengths greater than 20‵.
Design Values for Joists and Rafters
These “Fb" values are for use where repetitive members are spaced not more than 24 inches. Values for surfaced dry or surfaced green lumber apply at 19% maximum moisture content in use.
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See PDF for table 
321.125 (3) CONTROL STANDARDS
The following are designs acceptable by the department to achieve compliance with the control standards of acceptable soil loss or percent reduction of sediment load in runoff from a site.
Less than one acre disturbance (regardless of the lot or property size).
A. Mandated practices:
1. A method to prevent or reduce soil from leaving a site via entries or roads. This may include a tracking pad or tire washing stand designed and installed to meet DNR Standard 1057. Other means of compliance include a gravel mulch, frozen soil, bedrock or some other physical means to prevent soil from leaving the site on vehicle tires which is equivalent to the tracking pad or tire washing stand.
2. Storm water inlet protection. Inlet protection may be accomplished by using DNR Technical Standard, number 1050, “Storm Drain Inlet Protection for Construction Sites". The protection of stormwater inlets in the code is specific to “on-site" inlets; however an off-site inlet may create a direct conduit to a water of the state, which links any inlet that leads to a water of the state to the #3 mandated practice. In that case, special care should be taken to protect both types of inlets from sediment in runoff from a construction site.
3. Protection of adjoining waters of the state. The installation of practices is necessary if runoff from the disturbance could impact a water of the state. Practices may include channel erosion mats, silt fences, vegetative buffers or any other practices applicable to the specific site.
4. Drainage way protection. Any ditches or drainage ways that flow off-site must be protected with appropriate best management practices (BMPs). This may include but is not limited to ditch checks, channel erosion control mats or riprap.
5. Dewatering activity sediment reduction. Any dewatering necessary on the construction site must include measures to reduce the sediment in the water leaving the site. Dewatering BMPs may include filters, fiber rolls or gravel bag berms.
6. Stockpile protection. Any soil stockpiles which are left more than 7 days must be protected by seeding and mulching, erosion mat, silt fencing, covering or other methods. This does not include fill or topsoil piles that are in active use.
B. In addition to mandated practices, the owner/contractor or designer must choose one or more of the following methods in order to achieve compliance with the standards.
1. The Revised Universal Soil Loss Equation may be used to determine the amount of soil lost from a site in order to stay below the 5 tons/acre/year for sand, loamy sand, sandy loam, loam, sandy clay loam, clay loam, sandy clay, silty clay or clay textures or the 7.5 tons/acre/year soil loss for silt, silty clay loam or silt loam textures. The Department-accepted version of an Excel worksheet that is used to calculate the soil loss is available at:
http://dsps.wi.gov/Default.aspx?Page=224e686e-b2b6-44ac-b79d-d8ad3d3cb560.
2. Silt fence may be placed in accordance with the DNR Technical Standard 1056 and remain on the site until the pervious area is stabilized. This practice, in addition to the mandated practices in part “A" is accepted by the Department of Safety and Professional Services as compliant with the 40% reduction in sediment load goal.
3. The site may be seeded and mulched, erosion control mat may be installed or polymers may be applied. The erosion control BMPs must be applied within one week of disturbance. Seeding must be accomplished in accordance with DNR Technical Standard 1059 and mulching with DNR Technical Standard 1058. Erosion control mat must be installed in accordance with DNR Technical Standards 1052 and 1053. Polymer application must be done in accordance with DNR Technical Standard 1051. This method is only acceptable when the maximum slope length is 300 feet and the maximum slope is no more than that specified in Table A-321.125-1 and Table A-321.125-2.
4. Practices may be included in the erosion and sediment control plan for the site that achieve compliance with the 40% reduction in sediment load in the runoff from the site. Table A-321.125-3 lists several erosion and sediment control BMPs and the USEPA (United States Environmental Protection Agency) efficiency rating for that BMP.
5. A unique design may be submitted with the UDC permit application for review.
Table A-321.125-1
Slope Limitations for Permissible Soil Loss with max. 300‵ slope length1
When sites are seeded, mulched or otherwise stabilized within one week of disturbance2
- See PDF for table
1 The information in the table is derived from Grant County rainfall information and the use of the Revised Universal Soil Loss Equation. The slope limitation refers to the maximum slope permitted in order to achieve code compliance for the site specifics in the table. Opening date is the 15th of each month and closing is the 22nd. End date is 60 days past closing date.
2 Stabilization may be accomplished by temporary seeding and mulching, permanent seeding and mulching, application of polymers or placement of erosion control mats. Additionally, the mandated practices specific to the site must be in place.
Table A-321.125-2
Slope Limitations for Permissible Soil Loss with max. 300‵ slope length1
When sites are seeded, mulched or otherwise stabilized within 4 weeks of disturbance2
- See PDF for table
1 The information in the table is derived from Grant County rainfall information and the use of the Revised Universal Soil Loss Equation. The slope limitation refers to the maximum slope permitted in order to achieve code compliance for the site specifics in the table. Opening date is the 15th of each month and closing is the 15th of the following month End date is 60 days past closing date.
2 Stabilization may be accomplished by temporary seeding and mulching, permanent seeding and mulching, application of polymers or placement of erosion control mats. Additionally, the mandated practices specific to the site must be in place.
Erosion and sediment control for construction sites having a land-disturbance area of one acre or more is regulated by the Department of Natural Resources
Table A-321.125-3
1 BMP efficiency is derived from information provided on the Environmental Protection Construction Erosion Control website in August, 2006 and only when the BMP is installed per the listed standard.
2 Standard number refers to the Wisconsin Department of Natural Resources Conservation Practice Standard number.
