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Correspondence • _o* , ade November 13, 2002 Ronald James Ped 4742 Liberty Rd Salem, OR 97302 RE: 10998 SW 68 Parkway Bank of Tigard The City of Tigard Building Division has reviewed the submitted building plans for the above referenced address in accordance with the Oregon Structural Specialty Code (OSSC), 1998 edition and the 1999 Uniform Fire Code as amended by TVFR. 1) North wall line is on the property line, no openings are allowed. Plans show a one hour window please remove the window and resubmit corrected plans. 2) Due to location on the property show how you plan to penetrate your rated walls or ceiling with bath fans or plumbing vents. 3) Due to location of the East property line adjacent to the stair tower shall be one -hour rated. 4) Minimum roof classification is type B plans only state architectural shingles. 5) Please note second floor office room 202 has windows that appear to be with in 10 of the property line and would require fire rating please clarify. 6) Revised plans show 10 foot lay back in lieu of parapet construction provide rated access openings to all enclosed areas with headroom greater than 30 ". 7) Provide enlarged details of the one -hour ceiling system with the furring strips as described in the listing. 8) Plans show a one -hour shaft detail. Where is the shaft located in the structure? 9) Provide an exterior rated one -hour wall assembly showing brick or cedar cladding as proposed. Due to the major code items identified in this letter the entire structure must be redrawn and submitted for review per Section 106.4.3 Oregon Structural Specialty Code. Please submit revised plans showing compliance with codes. If you have any questions regarding this review, please contact me at (503) 369 -4171 ext. 2436 Sincerely, Daryl Jones Plans Examiner • 06/ • RONALD JAMES PED AC H `J EL, 1 November 26, 2002 RECEIVED Gary Lampella NOV 2 7 2002 Plans Examiner CITY OF TIGARD Tigard City Hall 13125 SW Hall Boulevard BUILDING DIVISION Tigard, Oregon 97223 Gary, The following is a response letter to the Daryl Jones plan review letter dated 11/13/2002. #1 All the windows along the north property line have been removed. Please see revised page A2.1. #2 Please see section "C" on sheet A3.1 for detail showing the locations of the bathroom fans and roof fans on the north side of the building. Please note that there are no penetrations within 10' of the property line. #3 The plans (sheets A2.1 and A2.2) have been revised portions of the stair tower that are within 10' of property line are now rated. Please also see sections "E" and "F" on A3.1. for the extent of the rating. #4 The roof has been classified as a type "B ", please see revised sheet A3.2. 4742 Liberty Road Box 194 Salem Oregon 97302 (503)363 -1456 #5 The Handbook to the 1997 UBC states that openings are permitted when perpendicular to the property line regardless of the distance from the property line, please see Figure 503 -2. Section 503.2.1 of UBC 1997 volume 1 states that openings do not have to be rated when located in walls that are at right angles to property line. Attached with the letter are the code sections for your review. #6 We do not have enclosed areas with headroom greater than 30 ". #7 Please see detail #2 on sheet A2.1 and sheet A2.2. #8 We do not have a shaft within the building. Plans have been revised. #9 One hour assembly (detail #1 on sheets A2.1 and A2.2) is a Toad bearing wall assembly. Sincerely, Ronald James Ped Architect, PC. President • • 1997 UNIFORM BUILDING CODE 501 503.4.6 Chapter 5 GENERAL BUILDING LIMITATIONS SECTION 501 — SCOPE levels open into the court, (2) the aggregate area of the building includ- ing the court is within the allowable area and (3) the building is not clas- Buildings and structures shall comply with the location on prop- sifted as a Group I Occupancy. erty, area, height and other provisions of this chapter. When a new building is to be erected on the same property as an For additional limitations or allowances for special uses or oc- existing building, the location of the assumed property line with cupancies, see the following: relation to the existing building shall be such that the exterior wall SECTION SUBJECT and opening protection of the existing building meet the criteria as 402 Atria set forth in Table 5 -A and Chapter 6. 403 High -rise office buildings and Group R, EXCEPTION: Two or more buildings on the same property may Division 1 Occupancies be considered as portions of one building if the aggregate area of such 404 Malls buildings is within the limits specified in Section 504 for a single build- ing. 311.9 Open parking structures When the buildings so considered house different occupancies or 307 Group H, Division 6 Occupancies are of different types of construction, the area shall be that allowed for 412 Aviation control towers the most restricted occupancy or construction. 414 Agricultural buildings 503.4 Special Provisions and Exceptions to Table 5 -A. 3111 Membrane structures 503.4.1 General. The provisions of this section are exceptions SECTION 502 — PREMISES IDENTIFICATION to, or special provisions of, the construction requirements of Table 5 -A, Chapters 3 and 6. Approved numbers or addresses shall be provided for all new 503.4.2 One - story Groups B, F, M and S Occupancies. In buildings in such a position as to be plainly visible and legible Groups B, F, M and S Occupancies, a fire- resistive time period from the street or road fronting the property. will not be required for an exterior wall of a one -story, Type II -N building, provided the floor area of the building does not exceed SECTION 503 — LOCATION ON PROPERTY 1,000 square feet (93 m and such wall is located not less than 5 feet (1524 mm) from a property line. 503.1 General. Buildings shall adjoin or have access to a public way or yard on not less than one side. Required yards shall be per- 503.4.3 Fire retardant treated wood framing. In Types III manently maintained. and IV construction, approved fire- retardant- treated wood fram- ing may be used within the assembly of exterior walls when Table For the purpose of this section, the center line of an adjoining 5 -A allows a fire- resistive rating of two hours or Tess, provided the public way shall be considered an adjacent property line. (See also required fire resistance is maintained and the exposed outer and Section 1204.4.) inner faces of such walls are noncombustible. 503.2 Fire Resistance of Walls. 503.4.4 Wood columns and arches. In Types IJI and IV con - 503.2.1 General. Exterior walls shall have fire resistance and struction, wood columns and arches conforming to heavy- timber opening protection as set forth in Table 5 - and in accordance sizes may be used externally when exterior walls are permitted to with such additional provisions as are set forth in Chapter 6. Dis- be unprotected, noncombustible construction or when one -hour tance shall be measured at right angles from the property line. The fire- resistive noncombustible exterior walls are permitted. above provisions shall not apply to walls at right angles to the 503.4.5 Group H Occupancies — minimum distance to prop - property line. erty lines. Regardless of any other provisions, Group H Occu- Projections beyond the exterior wall shall comply with Section pancies shall be set back a minimum distance from property lines 705 and shall not extend beyond: as set forth in Items 1 through 4. Distances shall be measured from 1. A point one third the distance to the property line from an as the walls enclosing the occupancy to all property lines, including sumed vertical plane located where fire- resistive protection of those on a public way. openings is first required due to location on property; or 1. Group H, Division 1 Occupancies. Not less than 75 feet 2. More than 12 inches (305 mm) into areas where openings are (22 860 mm) and not less than required by Table 3 -F. prohibited. 2. Group H, Division 2 Occupancies. Not less than 30 feet (9144 mm) when the area of the occupancy exceeds 1,000 square 503.2.2 Area of openings. When openings in exterior walls are feet (93 m and it is not required to be located in a detached build - required to be protected due to distance from property line, the ing sum of the area of such openings shall not exceed 50 percent of the total area of the wall in each story. 3. Group H, Divisions 2 and 3 Occupancies. Not less than 50 feet (15 240 mm) when a detached building is required. See 503.3 Buildings on Same Property and Buildings Containing Table 3 - G. Courts. For the purposes of determining the required wall and 4. Group H, Divisions 2 and 3 Occupancies containing materi- opening protection and roof covering requirements, buildings on als with explosive characteristics. Not less than the distances re- the same property and court walls of buildings over one story in quired by Table 3-F. height shall be assumed to have a property line between them. EXCEPTION: In court walls where opening protection is re- 503.4.6 Group H, Division 1, 2 or 3 Occupancies— detached quired, such protection may be omitted, provided (1) not more than two buildings. When a detached building is required by Table 3 - 1 -51 1997 UBC HANDBOOK r Because the open space between a street front lot line and cen- Figure 503 -2 illustrates where openings are permitted in walls ter line of the street is available to property on both sides of the that are at least 90 degrees to the property line. street, the code provides that the center line of the street shall be assumed to be the property line. As the code refers to "public Figure 503 -3 illustrates the application of exterior wall and way," this would also be applicable to an alley or other appropri- opening protection where the exterior walls of the building are _ ate open spaces that the building official may determine is rea not parallel to the property line but rather are at some angle other sonably likely to remain unobstructed through the years. than 90 degrees to the property line. In this case, the illustrations assume that the building is one -story Type V -N construction _ 503.2 Fire Resistance of Walls. The rules for exterior wall and used for offices (Group B Occupancy). Referring to UBC Table opening protection based on proximity to the property line are 5 -A, it is noted that exterior walls less than 20 feet (6096 mm) contained in UBC Table 5 -A. As it turns out, the exterior wall from the property line must be of one -hour fire- resistive con - requirements based on location on property as set forth in Table struction. Moreover, no openings are permitted in exterior walls 5 -A also become the governing condition for exterior walls less than 5 feet (1524 mm) from the property line, and protected based on type of construction, as set forth in Table 6 -A. More openings are required where the distance is less than 10 feet discussion about this topic appears in Chapter 6. (3048 mm). The Uniform Building Code is somewhat unique in that not To give substance to the requirement that exterior walls with only are the distances measured at right angles to the property in a specified distance of the property line be of fire- resistive line but the fire- protection requirements for exterior walls and construction, Section 503.2.2 limits the total area of openings in openings do not apply to walls which are at right angles to the the exterior walls where openings are required to be protected to property line. Thus, openings may be placed in walls which are 50 percent of the area of that wall in that story. Further, the area at right angles to the property line right up to the property line. of individual glazed openings is limited by Section 713.8. C • WALL MORE THAN 90 DEGREES FROM PROPERTY LINE M OPENINGS PERMITTED I PROPERTY LINE WALL— NO OPENINGS PERMITTED WITHIN 5 FEET OF TYPE V -N PROPERTY LINE GROUP B • OPENINGS PERMITTED REGARDLESS OF I DISTANCE TO PROPERTY LINE N'— • WALL AT 90 DEGREES ANY DISTANCE 1 1 For SI: 1 foot = 304.8 mm. PROTECTION OF OPENINGS IN WALLS AT RIGHT ANGLES TO PROPERTY LINES FIGURE 503 -2 i 74 is . , , -