Truckee Municipal Code Ch. 15.03 Revisions and Additions to the California Building and Residential Codes

California Building Code Section 105.5 and California Residential Code Section R105.5 are deleted and replaced to read:

Every permit issued shall expire two years from the date of issuance. Every permit shall expire by limitation and become null and void if the building or work authorized by such permit is not commenced within 360 days from the date of such permit, or if the building or work authorized by such permit is suspended or abandoned at any time after the work is commenced for a period of more than 360 days. Once a building permit has expired, work can be recommenced only after that permit is renewed or a new permit is issued. The fee therefore shall be one-half the amount required for a new permit for such work, provided no changes have been made or will be made in the original plans and specifications for such work; and provided further that such suspension or abandonment has not exceeded one year. In order to renew action on a permit expired, suspended or abandoned by over one year, the permittee shall pay a new full permit fee.

The following shall be added to California Building Code Section 107.1 and California Residential Code Section R106.1:

All structures or buildings classified in Occupancy Groups A, B, E, F, H, I, L, M, R, S and U shall be designed by an architect or civil/structural engineer, licensed/registered in the State of California. All plans will be deemed to have complied with the requirements of this Section, provided that they are prepared in accordance with sections 6731, 6737, 6737.1 of the Business and Professions Code.

The effective date for this section is January 1, 2000.

The following shall be added to California Building Code Section 107.2.1 and California Residential Code Section R106.1.1:

For new construction, all lots will require a Topographic Survey prepared by a California licensed Land Surveyor, or Civil Engineer licensed to perform such services.

Exception: The Building Official may waive the Topographic Survey requirements for minor additions and alterations. The Building Official may also consider a waiver of this requirement based on a written request and a determination that topographic information is not necessary for the proposed project.

For new construction all lots will require a Boundary Survey prepared by a California licensed Land Surveyor or Civil engineer licensed to perform such services.

Exception: The Building Official may consider a waiver of the Boundary Survey requirements for minor additions or alterations.

(a) For purposes of clarification and enforcement of California Building Code Chapter 7A and California Residential Code Section R337, Materials and Construction Methods for Exterior Wildfire Exposure, the Town of Truckee designates itself as a Wildland Urban Interface (WUI) area and applies California Building Code Chapter 7A and California Residential Code Section R337, Materials and Construction Methods for Exterior Wildfire Exposure standards to all areas within the Town of Truckee, regardless of a property's fire hazard severity zone designation status, as adopted under Ordinance 2025-04.

(b) Section 701A.3 Exception 4 of the California Building Code and Section R337.1.3 Exception 4 of the California Residential Code are deleted and replaced to read as follows: Additions to and remodels of buildings originally constructed prior to the applicable application date, other than the replacement of roofing, siding, and windows as follows:

(1) If the entire roof is being replaced within any one-year period, the new roof shall comply with Sections 705A and R337.5.

(2) If the entire building is being re-sided within any one-year period, the new siding shall comply with Sections 707A and R337.7 and vents shall comply with Sections 706A and R337.6.

(3) If all the windows are being replaced within any one-year period, the new windows shall comply with Sections 708A and R337.8.

(ORD 2025-04, 5-13-2025)

California Building Code Section 1505.1.1 and California Residential Code Section R902.1.1 are written here for emphasis and clarity:

"The entire roof covering of every existing structure where more than 50 percent of the total roof area is replaced within any one-year period, the entire roof covering of every new structure, and any roof covering applied in the alteration, repair or replacement of the roof of every existing structure, shall be a fire-retardant roof covering that is at least Class A."

Add new Section 1505.6.1 to the California Building Code and Section R905.1.3 to the California Residential Code as follows:

With the exception of the Historic District, wood shake and wood shingle roofs are prohibited. Where installed in the Historic District, wood roof assemblies shall be Class A fire rated.

Add the following to California Building Code Section 1507.4.5 and to California Residential Code Section R905.10.6:

Sheet metal roofing shall be applied over an underlayment of not less than 15 lb. felt. The underlayment shall be applied horizontally. Fasteners and their spacing shall be as specified by the manufacturer.

Add Section 1503.6 to the California Building Code and Section R903.5 to the California Residential Code as follows:

For purposes of shingle, shake and tile roofs, all of the Town of Truckee is classified as a severe climate and "high snow" area.

Add to Section 1507.2.8.2 to the California Building Code and Section R905.2.8.2 of the California Residential Code as follows:

Metal valley flashing underlayment used in conjunction with shingle, tile and shake roofs, shall be solid cemented to the roofing underlayment for roof slopes under 8 units vertical in 12 units horizontal (58.3% slope).

Section 1507.1.2 of the California Building Code and Section R905.1.2 of the California Residential Code are deleted and replaced to read:

An Ice Barrier is required on roofs of heated areas of buildings. Roofs, regardless of covering, shall be protected against leakage (caused by ice and snow) using an approved manufactured membrane installed per the manufacturer's specifications and as approved by the Building Official. This application shall extend from the eave edge of the roof up the roof slope measured 5 feet beyond the wall line separating the conditioned and unconditioned space, up 30 inches along each side of a valley and 12 inches up the vertical wall at roof to wall intersections. This Ice Barrier shall be in addition to any underlayment if required.

Add Section 1608.4 to the California Building Code and Section R301.2.3.1 to the California Residential Code as follows:

All of the Town of Truckee shall be declared a snow area. This pertains to all structures, mobile homes, modular buildings, factory-built houses and commercial coaches. The following snow load requirements are established for all structures.

(a) Applicable west of the west section line of Township 17 North, Range 16 East, Sections 5, 8 and 17 and Township 18 North, Range 16 East, Section 32.

TABLE 1608.3 GROUND SNOW LOADS*

(b) Applicable east of the east section line of Township 17 North, Range 16 East, Sections 5, 8 and 17 and Township 18 North, Range 16 East, Section 32.

TABLE 1608.4 GROUND SNOW LOADS*

* Intermediate values may be interpolated by proportion.

(c) The snow loads within Township 17 North, Range 16 East, Sections 5, 8 and 17 and Township 18 North, Range 16 East, Section 32 shall be on a straight line proportion between the values shown in Tables 1608.3 and 1608.4 based on the distance of the site from the boundary of the transition zone.

(d) Higher snow loading than those shown in Tables 1608.3 and 1608.4 may be required by the Building Official in local areas of known higher snow accumulation.

(e) Deviations from the above set forth snow loading may be permitted by the Building Official, provided the snow load and conditions in each individual case are derived and certified by a registered civil/structural engineer who can show proper experience in snow load evaluation.

(f) In the design of buildings and structures, consideration shall be given to the following:

(1) Unbalanced loading of roofs.

(2) Drifting due to adjacent obstructions.

(3) Accumulations in valleys and adjacent to parapet walls and chimneys.

(4) Ice loads on cornices of at least one and one half times the roof snow load.

(5) Possible impact loadings from snow falling on structure from higher roofs.

(6) Effect on structure from dynamic loading caused by snow sliding off roof.

(7) Snow sliding off roof and dynamically loading sidewalls by being forced against same due to snow embankment adjacent to the structure.

(8) Protection of entrances, exits and windows from the danger of falling icicles and snow sliding off pitched roofs.

(9) Ice weight where it will refreeze on unheated overhangs after having melted and run off from portions of roofs with heat below same.

(10) Projections through the roof, such as ventilation and plumbing vents, which may be torn off or damaged by sliding snow.

(11) Gas meter sheds shall be designed to resist 1.4 times the ground snow load, P g .

(12) Decks located above the anticipated snow depth may be designed as flat roofs. The snow load for decks located below the anticipated snow depth may be interpolated between the roof and ground snow load based on the appropriate height. Consider impact, uplift and drift as appropriate.

(g) Pitch reductions shall not apply to roofs where the eave line extends below the anticipated snow depth. "A-Frame" buildings and other similar types wherein the roof extends below the anticipated depth of the snow on the ground, the tabulated ground snow load values must be used on the roof below the ground snow level. Also, special design consideration must be made for the stress condition wherein the snow from the upper portion of the roof slides down on top of the ground snow and consequently further increases the loading on the lower portion of said roof.

(h) Use of the "Unobstructed Slippery Surfaces" reduction in ASCE 7-16 Figure 7.4-1 is prohibited unless approved by the Building Official and the property is deed restricted to prevent future reroofing with a non-slippery material and future installations of snow guards (for snow retention).

(a) Add the following to ASCE 7-16, Section 7.6.1 Unbalanced Snow Loads for Hip and Gable Roofs:

(1) For roof pitches of less than or equal to 7/12 where the ground snow load (P g ) exceeds 100 psf, the unbalanced load (Pun) need not exceed:

0 psf at the ridge and

hr*γ psf at the eave

Where: hr = Vertical distance between the eave and ridge in feet

γ = Density of the snow in pounds per cubic foot (pcf)

This unbalanced load is determined from the maximum amount of drift snow that can accumulate on the leeward side of the roof.

(A) Where the ground snow load (P g ) exceeds 100 psf and a pitch reduction is taken for the roof snow load, a valley load of 0.25*P s shall be added to the sloped roof snow load (P s ) in the influence area of all valleys created by intersecting roofs where the roof intersection angle is between 45 degrees and 90 degrees. For roof intersection angles less than 45 degrees design shall be in accordance with ASCE 7-16 section 7.6.3.

(B) Valley and drift loads need not be applied concurrently.

(C) Amend ASCE 7-16 table 7.3-2 Thermal Factor, C t as follows:

For open air structures C t shall be 1.1.

Exception: For decks C t may be 1.0.

(D) Add the following to ASCE 7-16 section 7.4.5 Ice Dams and Icicles Along Eaves:

(1) For roofs with a roof snow load (P f or P s ) greater than 100 psf the eave load need not exceed 1.5*P f or 1.5*P s on the eave end that drains water. In addition, a minimum of 50% of the roof snow load shall be considered on the roof up slope of the eave when this uniformly distributed load is applied.

(E) Add the following to ASCE 7-16 section 7.9 Sliding Snow.

(F) Impact Load on Lower Structure. The load caused by snow sliding off a sloped upper roof onto a lower structure shall be determined for slippery upper roofs with slopes greater than 1/4 on 12, and for other (i.e., non-slippery) upper roofs with slopes greater than 2 on 12. The total impact load per unit length of the eave shall be:

Upper roof (Pf or Ps) * Ii + Lower structure (Pf, Ps or Pg)

See table below for Impact Factor Ii.

The impact load shall be placed on the lower structure over a distance of 10 ft from the upper roof eave.

Impact Factor Table

1 The Impact Surface may be taken as the top of the snow on the lower structure.

2 Rebound loads shall be considered.

(b) ASCE 7-16 equation 7.7-1 (density):

Density need not exceed 25 pcf.

(c) ASCE 7-16 section 12.14.8.1 Seismic Base Shear:

ASCE 12.14.8.1 - Note 4, use 20% of the actual (not flat) roof snow load that is used for the roof design.

Add Section 1613.1.4 to the California Building Code as follows:

1613.1.4 Earthquake Design. Modify ASCE 7-16, Table 12.2-1 as follows:

Add a new line item under A. Bearing Wall Systems in Table 12.2-1 as follows:

19. Heavy timber braced frames where the bracing carries gravity loads ASCE 7-16 section where detailing requirements are specified - 14.5 Response modification coefficient, R - 3.0 System over strength factor, omega - 2.5 Deflection amplification factor, C d - 3.5 Structural system limitations and building height (ft) limit Seismic design category B — NL C — NL D — 65 E — 65 F — 65

Add a new line item under B. Building Frame Systems in Table 12.2-1 as follows:

27. Heavy timber ordinary braced frames ASCE 7-16 section where detailing requirements are specified - 14.5 Response modification coefficient, R - 5.6 System over strength factor, omega - 2.2 Deflection amplification factor, C d - 1.0 for knee braced frames, C d - 3.5 for all others Structural system limitations and building height (ft) limit Seismic design category B — NL C — NL D — 65 E — 65 F — 65

Use limitations for Heavy Timber Braced Frames braced with knee braces:

Heavy timber knee braced frames are allowed as a seismic force resisting system only in light open one (1) story structures (e.g., covered porches, porte cocheres, outdoor pavilions & carports) without hard finishes (e.g., gypsum wall board, stucco, stone) where larger deflections can be accommodated. P-delta effects shall be considered per section 12.8.7.

Add new California Building Code Section 1608.5 and California Residential Code Section R1007 as follows:

Chimneys, chimney chases, flues and heating appliance vents projecting through the roof shall be protected from damage by sliding snow or ice as follows:

(a) When roof pitch is 0 in 12 through 2 in 12, inclusive, no snow is splitter required.

(b) When roof pitch is steeper than 2 in 12 provide metal-formed snow splitter with a minimum vertical height (at the apex) at least one-half of the required vertical height of the vent extension above the roof. In no case shall a snow splitter measuring less than 8 inches at the apex be used.

(c) When framed chimney chases or masonry chimneys project above the roof, they shall be engineered and protected by a snow splitter with a minimum height equal to one-half of the required height of the flue or chimney. The width, at the base of the snow splitter, shall be equal to or greater than the width of the chimney or chase.

(d) All snow splitters shall be secured to the roof frame and sheathing to withstand the shear loads anticipated. All heating appliance vents, flues and chimneys shall be strapped to the snow splitter near its apex with a galvanized steel strap. Minimum thickness of the steel strap shall be 16 gauge.

Exception to the above: Flues, appliance vents and chimneys greater than four (4) inches in diameter which penetrate the roof within 36 inches of the ridge shall be permitted without snow splitters.

Delete and replace California Building Code Section 1809.5 and California Residential Code Section R403.1.4.1 as follows:

Unless erected on solid rock, to protect against frost and freezing, the minimum foundation depth is 18 inches below grade if below 7000-foot elevation and 24 inches below grade for 7000-foot elevation and above.

Exception: Interior footings shall be a minimum of 12 inches below grade.

Delete and replace California Building Code Appendix Chapter J, Section J103.2 as follows:

J103.2 Exempted Work. A grading permit is not required for the following:

(a) Clearing, grubbing, and excavation or fills less than 20 cubic yards that disturb less than 500 square feet.

(b) Excavation for construction of a structure permitted under this code.

(c) Cemetery graves.

(d) Refuse disposal sites controlled by other regulations.

(e) Excavations for wells or trenches for utilities.

(f) Mining, quarrying, excavating, processing or stockpiling of rock, sand, gravel, aggregate or clay controlled by other regulations, provided such operations do not affect the lateral support of, or significantly increase the stresses in, soil on adjoining property.

(g) Exploratory excavations under the direction of a registered design professional.

(h) Existing nursery and agricultural operations conducted as a permitted main or accessory use.

(i) Tree cutting without ground disturbance.

Exemption from the permit requirements of this chapter shall not be deemed to grant authorization for any work to be done in any manner in violation of the provisions of this chapter or any other laws or ordinances of this jurisdiction.

Add a new Section J110.3 to California Building Code Appendix Chapter J as follows:

J110.3 Standard for One and Two Family Dwelling Construction Projects. The Town of Truckee Minimum Standards for Erosion Prevention on One and Two Family Dwelling Construction Projects is adopted by reference to be enforced as part of this code.

Add the following to Section R324.6.2 of the California Residential Code and Section 1204.2.1.2 of the California Fire Code as follows:

The Building Division may permit solar panels to be mounted no higher than the ridge of the roof so long as the opposite side of the roof is accessible for fire ground activities. In addition, the Building Division may require that the design of the panel mounting assembly discourage the accumulation of flammable materials (such as pine needles).

Add Section 2304.12.10 to the California Building Code and Section R317.1.7 to the California Residential Code as follows:

Exterior beam splices shall be flashed or otherwise protected from exposure to moisture. Exterior built-up members such as beams and posts shall be flashed or otherwise protected to prevent the collection of moisture between the members.

Add Section R303.11 to the California Residential Code as follows:

Storage areas within or adjacent to R occupancies shall be restricted to one electrical receptacle and one electrical light and switch unless otherwise approved by the Building Official.