OAR 437-004-0330
Fixed Industrial Stairs

(1)

Definitions. Unless otherwise stated, fixed industrial stair terms mean:

(a)

Handrail. A single bar or pipe supported on brackets from a wall or partition, and used as a handhold for persons on stairs or ramps.

(b)

Nose, nosing. That part of a tread projecting beyond the face of the riser.

(c)

Open riser. The space between the treads of stairways without upright parts (risers).

(d)

Platform. An extended step or landing breaking a continuous run of stairs.

(e)

Railing. A vertical barrier along exposed sides of stairs and platforms to prevent people from falling. The top rail usually serves as a handrail.

(f)

Rise. The vertical distance from the top of a tread to the top of the next higher tread.

(g)

Riser. The upright part of a step at the back of a lower tread and near the leading edge of the next higher tread.

(h)

Stairs, stairway. A set of steps with three or more risers, from one level or floor to another, or leading to platforms, pits or around machinery, tanks, and other equipment.

(i)

Tread. The horizontal part of a step.

(j)

Tread run. The horizontal distance from the leading edge of a tread to the leading edge of an adjacent tread.

(k)

Tread width. The horizontal distance from front to back of tread including nosing.

(2)

Application. This section has specifications for the safe design and construction of fixed stairs. This includes interior and exterior stairs around machinery, tanks, and other equipment, and stairs leading to or from floors, platforms, or pits. This section does not apply to stairs used for fire exits, private residences or articulated stairs, the angle of which changes with the rise and fall of the base support.

(3)

Where fixed stairs are required. There must be fixed stairs where work requires regular travel between floors or levels, and access to operating platforms at any equipment that requires frequent attention. There also must be fixed stairs for daily access to elevations or for access at each shift for such purposes as inspection, regular maintenance, etc. There must be fixed stairs where work may expose employees to acids, caustics, gases, or other harmful substances, or where employees normally must carry tools or equipment by hand. (It is not the intent of this section to preclude using fixed ladders for access to elevated tanks, towers, and similar structures, etc., where their use is common practice.) Spiral stairs are not legal except for special limited use and secondary access situations where it is not practical to provide a conventional stairway. Winding stairs are acceptable on tanks and similar round structures where the diameter of the structure is at least five (5) feet.

(4)

Stair strength. Fixed stairs must be able to carry a load of five times the normal live load anticipated but never less than a moving concentrated load of 1,000 pounds.

(5)

Stair width. Fixed stairs must be at least 22 inches wide.

(6)

Angle of stairway rise. Fixed stairs must be at angles to the horizontal of between 30° and 50°. Use any uniform combination of rise/tread dimensions that will result in stairs at an angle to the horizontal between 30° and 50°. Table 1 gives rise/tread dimensions that will produce stairs within this range. However, other allowable rise/tread combinations are possible. [Table not included. See ED. NOTE.]

(7)

Stair treads. All treads must be slip-resistant and the nosings must be a nonslip finish. Welded bar grating treads without nosings are acceptable if the leading edge can be readily identified by people descending the stairs and if the tread is serrated or is of nonslip design. Rise height and tread width must be uniform throughout any flight of stairs including any foundation structure used as one or more treads of the stairs. Treads must not be loose. Replace or repair defective treads quickly.

(8)

Stairway platforms. Stairway platforms must be no less than the width of the stairway and a minimum of 30 inches long measured in the direction of travel.

(9)

Railings and handrails. There must be standard railings on the open sides of exposed stairs and stair platforms. There must be handrails on at least one side of closed stairs preferably on the right side going down. Stair railings and handrails must comply with OAR 437-004-0320 (Guarding Floor and Wall Openings and Holes).

(10)

Vertical clearance. Vertical clearance above any stair tread to an overhead obstruction must be at least 6-1⁄2 feet measured from the leading edge of the tread.
[ED. NOTE: Tables referenced are available from the agency.]

Source: Rule 437-004-0330 — Fixed Industrial Stairs, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=437-004-0330.

437–004–0001
Application 437–004–0002
Scope 437–004–0003
Exclusive Coverage 437–004–0005
Access to Employee Exposure and Medical Records 437–004–0099
General Standards 437–004–0100
Universal Definitions 437–004–0150
Standards Organizations 437–004–0240
Safety Orientation for Seasonal Workers 437–004–0251
Safety Committees and Safety Meetings 437–004–0310
Working Surfaces 437–004–0320
Guarding Floor and Wall Openings and Holes 437–004–0330
Fixed Industrial Stairs 437–004–0340
Portable Ladders 437–004–0350
Orchard Ladders 437–004–0360
Fixed Ladders 437–004–0370
Scaffolding 437–004–0380
Manually Propelled Mobile Ladder Stands and Scaffolds (Towers) 437–004–0390
Other Working Surfaces 437–004–0405
Exits and Emergency Action Plan 437–004–0450
Emergency Action Plan 437–004–0570
Manlifts 437–004–0610
Ventilation 437–004–0630
Noise Exposure 437–004–0650
Ionizing Radiation 437–004–0710
Compressed Gases 437–004–0715
Acetylene 437–004–0716
Oxygen 437–004–0717
Hydrogen 437–004–0720
Flammable and Combustible Liquids 437–004–0725
Spray Finishing 437–004–0770
Explosives and Blasting Agents 437–004–0780
Storage and Handling of Liquefied Petroleum Gases 437–004–0790
Use of Liquefied Petroleum Gas or Natural Gas in Fields and Orchards 437–004–0800
Storage and Handling of Anhydrous Ammonia 437–004–0950
Hazardous Waste Operations and Emergency Response (HAZWOPER) 437–004–1005
General Requirements for Protective Equipment 437–004–1020
Personal Fall Protection 437–004–1030
Work Clothing 437–004–1035
Eye and Face Protection 437–004–1041
Respiratory Protection 437–004–1050
Head Protection 437–004–1060
Hand, Foot, and Extremity Protection 437–004–1070
Working Underway on Water 437–004–1075
Working Over or In Water 437–004–1105
Sanitation 437–004–1110
Field Sanitation for Hand Labor Work 437–004–1115
COVID-19 Workplace Requirements for Employer-Provided Labor Housing 437–004–1120
Agricultural Labor Housing and Related Facilities 437–004–1140
Lighting 437–004–1150
Safety Colors for Marking Physical Hazards 437–004–1180
Accident Prevention Signs 437–004–1250
Confined and Hazardous Spaces 437–004–1260
Manure Lagoons, Storage Ponds, Vats, Pits and Separators 437–004–1275
The Control of Hazardous Energy (Lockout/Tagout) 437–004–1305
Medical Services and First Aid 437–004–1430
Sources of Fire 437–004–1440
Required Postings 437–004–1450
Extinguishers 437–004–1460
Fire Prevention Plan 437–004–1470
Employee Equipment and Training 437–004–1505
Air Receivers and Pressure Systems 437–004–1525
Boilers and Steam Systems 437–004–1610
General Requirements 437–004–1630
Conveyors 437–004–1670
Automotive Hoists 437–004–1680
Storage of Hazardous Chemicals 437–004–1700
Forklifts and Other Powered Industrial Trucks 437–004–1750
Helicopters 437–004–1805
Rope, Chain, Rigging, and Hoists 437–004–1825
Tackle and Hoisting Equipment 437–004–1910
General Equipment Guarding 437–004–1940
Farm Field Equipment 437–004–1970
Farmstead Equipment 437–004–2000
Powered Saws 437–004–2100
Grinders 437–004–2220
General Requirements — Small Tools 437–004–2230
Guarding and Operation of Portable Powered Tools 437–004–2240
Power Lawnmowers 437–004–2260
Other Portable Tools and Equipment 437–004–2310
General Requirements 437–004–2350
Oxygen-Fuel Gas Welding and Cutting 437–004–2400
Arc Welding and Cutting 437–004–2810
General Requirements 437–004–2850
Temporary Lighting and Wiring 437–004–2860
Flexible Cable and Extension Cords 437–004–2870
Attachment Plugs and Receptacles 437–004–2880
Cord and Plug-Connected Equipment 437–004–2900
Grounding and Bonding 437–004–2950
Switches and Circuit Breakers 437–004–3000
Identification and Load Ratings 437–004–3050
Work Near Overhead Lines 437–004–3075
Agricultural Buildings with Special Hazards 437–004–3100
Excavation 437–004–3410
Agricultural, Commercial and Industrial Vehicles 437–004–3420
Working from Vehicles and Vehicle Loads 437–004–3430
Training for Agriculture Tractor Operators 437–004–3460
Industrial Vehicles 437–004–3480
Bridges, Roads and Ramps 437–004–3550
Servicing Multi Piece and Single Piece Rim Wheels 437–004–3600
Roll-Over Protective Structures (ROPS) for Tractors in Agriculture 437–004–3650
Roll-Over Protective Structures — Industrial Vehicles 437–004–3660
Vehicle-Mounted Elevating and Rotating Work Platforms 437–004–6000
Adoption by Reference of Federal Standard 437–004–6001
Expiration and Implementation Dates 437–004–6401
Effective dates for worker training programs in Oregon 437–004–6405
Restrictions Associated With Outdoor Production Pesticide Applications 437–004–6406
Pesticide Spray Drift and Innovative Methods 437–004–6501
Handler training programs in Oregon 437–004–6502
Oregon requirements for Worker Protection Standard trainers of handlers who qualify using train-the-trainer programs 437–004–6508
Respiratory Protection 437–004–6509
Emergency eye-washes and eye flushing supplies 437–004–9000
Oregon Rules for Air Contaminants 437–004–9010
Fumigated Areas. 437–004–9050
Asbestos 437–004–9090
13 Carcinogens 437–004–9600
Lead 437–004–9620
Cadmium 437–004–9626
Chromium (VI) 437–004–9640
Benzene 437–004–9650
Bloodborne Pathogens 437–004–9710
Acrylonitrile 437–004–9720
Thiram 437–004–9740
Ethylene Oxide 437–004–9760
Formaldehyde 437–004–9780
Methylendianiline 437–004–9800
Hazard Communication Standard for Agricultural Employers 437–004–9830
Retention of Department of Transportation (DOT) Markings, Placards and Labels 437–004–9850
Pipe Labelling 437–004–9860
Hazardous Chemicals in Laboratories
Last Updated

Jun. 8, 2021

Rule 437-004-0330’s source at or​.us