Wilcox Building Construction Notice: The west doors of the Wilcox Building, located at 301 Wilcox Street in Castle Rock, will be limited to ADA/ramp access ONLY from August 9 to 25. All other visitors to the Wilcox Building will need to use the alternate entrances during construction.
2018 IECC Compliance and Design Criteria for Homes in Douglas County
New residential; construction, additions, alterations, renovations or repairs shall comply with one of the following three paths for energy conservation:
Prescriptive – Just like it sounds, you need to follow the code to the letter (while you can do better, you can’t do any type of trade-offs).
Performance – aka UA/insulation trade-off option – Example – architect uses ResCheck or something similar to show compliance such as skipping under slab and/or exterior continuous insulation in favor of adding more insulation in the attic.
Energy Rating Index (ERI) option aka the HERS path where one has to meet or be less than a target HERS score where you can use higher efficient appliances to comply.
A permanent certificate provided by the builder, shall be posted in the room where the mechanical equipment is housed. The certificate shall list the R-values of insulation used in the walls, ceiling, floor, foundation and ducts along with the U-factors of the windows. The certificate shall list the type and efficiency of the heating, cooling and service water heating equipment installed.
Design Criteria for the Douglas County Building Division
Wind Speeds under the 2018 IRC
115 ultimate wind speed exposure “C” for elevations less than 7000 ft. U.S.G.S.
130 ultimate wind speed exposure “C” for elevations 7000 ft. and above U.S.G.S.
Wind Speeds under the 2018 IBC
Category I – Figure 1609.3 with (4) equals 105 mph
Category II – Figure 1609.3 with (1) equals 115 mph
Category III – Figure 1609.3 with (2) equals 120 mph
Category IV – Figure 1609.3 with (3) equals 120 mph
The design wind exposure category for unincorporated Douglas County shall be exposure “C”.
Site Class – B
ACI 318 Foundation walls over four feet in height shall have deformed bars not smaller than No. 4 in size with a specified yield strength of not less than 60,000 psi placed both vertically and horizontally with a maximum spacing of 18 inches. Foundation walls four feet in height or less shall have two horizontal deformed bars both top and bottom as specified in the following paragraph. All walls shall have two bars not smaller than No. 5 in size with a specified yield strength of not less than 60,000 psi placed horizontally at the top and bottom of the wall.
Minimum 36 inches below finished grade
Snow Loads are determined according to elevation
5152 – 5999
6000 – 6499
6500 – 6999
7000 – 7499
7500 – 7999
8000 – 8499
8500 – 8999
9000 – 9499
* Ground Snow Load = Roof Snow Load, reductions for Snow Loads are not allowed.