15.04.040 Design requirements.
A. Conflict between Codes. Whenever there is a conflict between a referenced code in CEMC Section 15.04.030 and the general requirements contained in CEMC Section 15.04.040, the general requirements shall apply.
B. Climatic and Geographic Design Criteria.
GROUND SNOW LOAD |
115 |
WIND SPEED (Gust) |
110 mph Topographic effects: NO Special wind region: NO Windborne debris zone: NO |
SEISMIC DESIGN CATEGORY |
IRC: D0 IBC: SS=0.65 S1=0.23 |
SUBJECT TO DAMAGE FROM |
|
Weathering |
Severe |
Frost line depth |
24" |
Termite |
Slight To Moderate |
WINTER DESIGN TEMP. |
2° |
ICE SHIELD UNDERLAYMENT REQUIRED |
YES |
FLOOD HAZARDS |
Date Entered Into NFIP: 3/3/1975 Date of Current FIRM Maps Adopted: 5/5/1981 |
AIR FREEZING INDEX |
1500 |
MEAN ANNUAL TEMP. |
50 |
C. Professional Preparation of Plans. The city of Cle Elum shall require a Washington State licensed design professional, licensed under the provisions of Chapter 18.08 RCW, Chapter 308-12 WAC (for architects) or Chapter 18.43 RCW (for engineers) to stamp, prepare or oversee the preparation of plans and calculations for buildings or structures when any of the following criteria are met but is not limited to the following:
1. The following are required to be professionally designed for structural integrity (lateral and gravity), life safety and architectural barriers (accessibility):
a. A building of any occupancy over four thousand square feet.
Exception: Residential structures.
b. Buildings containing five or more residential dwelling units.
2. The following are required to be professionally designed for structural integrity (lateral and gravity) only:
a. All steel, concrete, masonry and timber framed structures.
b. All log buildings and structures.
This includes any log or beam style trusses used in stick framed buildings.
Exception: One-story log buildings with a single ridged stick-framed roof with no valleys or trussed roof may be accepted without a professional structural design.
c. All other structures within the city of Cle Elum.
Exception: One-story buildings with a single ridged stick-framed roof with no valleys or trussed roof may be accepted without a professional structural design.
d. All premanufactured metal structures.
These structures are primarily used as carports and require a building permit when over two hundred square feet. All plans and specifications must be engineered by a Washington State licensed engineer and plans must state the snow load and wind load capacities. Plans must also include details on the tie-down or foundation systems.