|
||
|---|---|---|
Design Element |
HUD
|
Oregon Residential
|
| FIRE SAFETY | ||
| Exit doors |
Two
@ 28 in (min) width Must be 20 ft apart (min) 3280.105 (a) & (2) |
One @ 36 in width R 311.4.2 |
| Specific exit door location relationship to bedrooms | Yes 3280.105 |
None |
| Window height in bedroom from floor to opening of window |
36 in (max) 3280.106(b) |
44 in (max) R 310.1 |
| Bedroom egress window opening size |
24 in (min) high clear opening 20 in (min) width clear opening |
24 in (min) high clear opening 20 in (min) width clear opening R 310.1.2 & 310.1.3 |
| Required window area | 5 sq ft (min) | All egress openings min. 5.7 sq.
ft. R 310.1.1 |
| Hallways | 28 in wide (min) 3280.112 |
36 in wide R 311.3 |
Smoke Alarms |
Yes |
Yes |
| Flame spread | ||
| Walls | 200 flame spread rating 3280.203(1) |
200 flame spread
rating R 315.1 |
| Ceilings | 75
flame spread rating 3280.203(2) |
200 flame spread
rating R 315.1 |
| Furnace, water heater & cooking area | Special
protection with gypsum 25 flame spread 3280.203(3) |
Minimum
clearances specified Lesser clearance allowed with protective materials, unless under a stairway |
| Flame spread of plastic bathtubs, shower units and tub or shower doors | 200
flame spread rating 3280.203(6) |
Shall comply with ANSE Z 124.1-95 & 124.2-95 |
| ELECTRICAL | ||
| Requirements based on National Electric Code | Yes 3280.801 NEC NFPA 70 2005 |
Yes NEC NFPA 70 2008 |
| Required listed materials and devices | Yes 3280.801(d) |
Yes NEC 110.2 |
| Aluminum wire in branch circuits | Not
permitted 3280.801(e) |
Permitted NEC 310.2(b) |
| Receptacle location | Comparable 3280.806 |
Comparable NEC 210.52-210.63 |
| Load Circulations | Comparable 3280.804 |
Comparable NEC 210.23 |
| Separate neutral and ground circuits on branch circuit wiring and panel board(s) for range and dryer | Yes 3280.806 |
Yes NEC 220.52 (a & b) |
| Electric disconnecting means required at panel board | Yes | No |
| Single disconnecting means required at sub-panel board | Yes | No |
| Tests required on all parts | Yes 3280.810 |
No NEC 550.17 |
| PLUMBING | ||
| Water supply piping | Plastic allowed (CPVC or PEX) 3280.604 |
Plastic allowed (CPVC or PEX) UPC 301.1.1 |
| Drain-waste-vent piping | Plastic allowed
(PVC or ABS) 3280.610 |
Plastic allowed OPSC 701.1 |
| Venting of plumbing fixtures | Wet venting and anti-siphon (mechanical vents)
permitted in addition to required direct venting 3280.611(2 & 3) |
Wet venting permitted only for fixtures located
vertically above lower fixture in the same story OPSC 908.1 |
| Material | National accepted
standards 3280.603 |
National accepted
standards and Building Official approvals OPSC 301.2 |
| Test and inspections | Water systems, drainage and fixtures are tested 3280.612 |
Water systems, drainage vent systems and fixtures are tested OPSC 103.5.3 |
| STRUCTURAL DESIGN | ||
| Moisture in framing lumber | Kiln dried lumber required 19% max. moisture content 3280.304 | Green lumber permitted R 318.2 (19% max if interior finish is applied) |
| Roof live load | 20 PSF (min)
Depends on design zone 3280.305 (4)(c) |
25 PSF (min)
Depends on county and elevation Table R 301.2(1) |
| Wind load (horizontal) | 15 PSF (min) Depends on design zone 3280.305 |
15 PSF (min) Depends on design zone
and exposure R 301.2(1) |
| Wind load (vertical) | 9 PSF (min)
Depends on design zone 3280.305 |
20 PSF (min) Table R 301.2(2) |
| Floor live load | 40 PSF 3280.305 (g) |
40 PSF (min) Dwelling area 30 PSF Sleeping rooms Table 301.5 |
| Horizontal load on interior walls | 5 PSF 3280.305 (f)(2) |
See Chapter 6 |
| Roof trusses | Engineered and Tested | Engineered only R 802.10.2 |
| LOAD DEFLECTION | ||
| Floors | L/240 Span (max) 3280.305 |
1/360 Span (max) Table R 502.3.1 (1 & 2) & TR301.7 |
| Roof and ceiling | L/180 Span (max) 3280.305 |
1/240 Span (max) Table R 802.4.1 or TR301.7 |
| Walls | L/180 Span (max) 3280.305 |
L/120 Span (max) Table R 301.7 |
| Plans and Specifications | Engineered 3280.303 (B) |
Layman-if using
conventional framing methods R 106 (Const. Doc.) |
| ARCHITECTURAL DESIGN BUILDING PLANNING | ||
| Minimum Room Sizes | ||
| One living area | 150 square feet 3280.109 (a) |
120 square feet R 304.1 |
| Double bedroom | 70 square feet 3280.109.2 |
70 square feet R 304.2 |
| Single bedroom | 50 square feet 3280.109.2 |
70 square feet R 304.2 |
| Room width | 5 ft (min) 3280.110 |
7 ft (min) R 304.3 |
| Room height | 7 ft 0 in (min) (exceptions) 3280.104 |
7 ft 0 in. (min) R 305.1 |
| Hallway height | 6 ft 6 in (min) 3280.104(b) |
7 ft. 0 in. (min) R 305.1 |
| Closet depth | 22 in (min) 3280.109(c) |
Not specified |
| Light and Ventilation | ||
| Glazed area | 8% (min) gross floor area of room 3280.103(a) |
8% of habitable room floor area R 303.1 |
| Ventilation area | 4% (min) gross
floor area of room 3280.103(b) |
4% (min) gross
floor area of room R 303.1 |
| Mechanical | Habitable; .35 air changes per hour 3280.103(b) |
Mechanical ventilation (optional) 0.35 air changes per hour R 303.1 except #1 |
| Ventilation | Bath
50 cfm 3280.103(C)(3) |
Bath 50 cfm Table 1506.3 & MI507.4 |
| Ventilation to improve indoor air quality above minimum standard | Required | 15cfm per occupant R 303.1 except #1 |
| Formaldehyde emission control | Required | Not specified |
| Attic Ventilation | ||
| Fraction of floor area | 1/300 (min) 3280.504(c) |
1/150 (min)
reduction possible R 806.2 |
| THERMAL ENERGY CONSERVATION | ||
| Moisture control (vapor barrier) | Yes 3280.504 (all) |
Yes R 1104.9 |
| Walls | Yes 3280.504(b) |
Yes R 1104.1 |
| Ceiling | Yes 3280.504(a) |
Variable R 1104.1 |
| Floor | Specified 3280.504 |
Yes R 1104.1 |
| Air infiltration control | Specified 3280.505 |
Specified R 1104.8 |
| Double glazing or storm windows | Specified | R 1104.1 |
| Design basis for heating (winter) | 70 F (max) 3280.506 & 3280.510 |
Standard R 1103.1 |
| Thermal insulations | Performance standard |
Prescriptive or thermal performance R 1104 |
| Foam plastic insulation restrictions | Yes | R 314.1.1 |
