Chapter 13.110
BUILDING CODE

Sections:

13.110.010    Building Code.

13.110.020    International Building Code.

13.110.030    International Residential Code.

13.110.040    International Performance Code.

13.110.050    International Existing Building Code.

13.110.060    Copies on file.

13.110.010 Building Code.

The International Building Code, International Residential Code, International Performance Code and the International Existing Building Code, as adopted and amended by this chapter, shall collectively be referred to as the Building Code. (Ord. 10-1018 § 3 (part): Ord. 07-1012 § 1: Ord. 04-1008 § 3)

13.110.020 International Building Code.

The 2009 Edition of the International Building Code, as published by the International Code Council, as amended by the Washington State Building Code Council and published in Chapter 51-50 WAC, as now or hereafter amended, is hereby adopted by reference with the following additions and exceptions:

A. Appendixes E and H are hereby adopted.

B. The following is added to Section 504, Height Modifications:

504.2.1 Five story type VA buildings allowed.

Type VA buildings with B, M, R-1 and R-2 occupancies may be increased to five stories in height in accordance with all of the following:

1. The building is equipped throughout with an approved automatic sprinkler system in accordance with Section 903.3.1.1; and

2. The building is equipped with a complete, approved fire alarm and detection system; and

3. The fire sprinkler alarm system is provided with annunciation for each floor; and

4. The building does not exceed 60 feet in height; and

5. The vertical exit enclosures shall be smoke proof enclosures in accordance with Section 909.20; and

6. Special inspection is provided for the lateral support portion of the structural system; and

7. The building must comply with all other applicable provisions of Title 13 of the SeaTac Municipal Code.

(Ord. 10-1018 § 3 (part): Ord. 07-1012 § 1: Ord. 04-1029 § 1: Ord. 04-1008 § 3)

13.110.030 International Residential Code.

The 2009 Edition of the International Residential Code, as published by the International Code Council, as amended by the Washington State Building Code Council and published in Chapter 51-51 WAC, as now or hereafter amended, is hereby adopted.

A. Appendixes G and R are adopted.

B. Table R301.2, Climate and Geographic Design Criteria, is hereby amended to read as follows:

Ground/Roof Snow Load:

25 psf

Wind Speed:

85 mph

Topographic Effects:

No

Seismic Design Category:

D2

Subject to Damage From:

Weathering:

Moderate

Frost Line Depth:

18 inches

Termite:

Slight to Moderate

Decay:

Slight to Moderate

Outside Design Temperatures:

24F Heat; 83F Cool

Ice Shield Underlayment Required:

No

Flood Hazards:

FEMA # 530320

Air Freezing Index:

50

Mean Annual Temperature:

51.4

C. Sections R105.2 (1) and (7) are hereby amended to read as follows:

1. One-story detached accessory structures constructed under the provisions of the IRC used as tool and storage sheds, tree supported play structures, playhouses and similar uses, provided the floor area does not exceed 200 square feet (18.58 m2).

7. Prefabricated swimming pools provided they meet one of the following conditions:

a. The pool is less than 24 inches deep.

b. The pool walls are entirely above ground and the capacity does not exceed 5,000 gallons.

D. The following is added to R405.1.1 to read as follows:

Drainage. Provisions shall be made for the control and drainage of water around and under buildings.

Adequate provisions shall be made to insure that under floor spaces remain free of running or standing water by the installation of drains. Additional drains are required in foundations to relieve water from under floor spaces where it is determined by the Building Official that such drainage is required. Drain pipes shall be of sufficient size to adequately convey water to an approved location, but shall be a minimum size of 4 inches. Provisions shall be made to prevent the drainage system from becoming blocked.

(Ord. 10-1018 § 3 (part): Ord. 07-1012 § 1: Ord. 04-1008 § 3)

13.110.040 International Performance Code. 

The 2009 Edition of the International Performance Code, published by the International Code Council, as now or hereafter amended, is hereby adopted. (Ord. 10-1018 § 3 (part): Ord. 07-1012 § 1: Ord. 04-1008 § 3)

13.110.050 International Existing Building Code.

The 2009 Edition of the International Existing Building Code, published by the International Code Council, as now or hereafter amended, is hereby adopted. (Ord. 10-1018 § 3 (part): Ord. 07-1012 § 1: Ord. 04-1008 § 3)

13.110.060 Copies on file.

At least one (1) copy of the adopted editions of the International Building Code, International Residential Code, International Performance Code and the International Existing Building Code shall be on file in the office of the Building Official on behalf of the City Clerk. (Ord. 10-1018 § 3 (part): Ord. 07-1012 § 1: Ord. 04-1008 § 3)