OAR 437-007-0690
Metal Towers

(1)

A competent person must direct the raising and lowering of each metal tower.

(2)

All employees not engaged in the actual raising or lowering of metal towers must stay in the clear during these operations.

(3)

Metal towers must be level to provide proper line spooling and avoid excessive stress on component parts.

(4)

Each metal tower must have an identification plate permanently attached to its base or on the yarder in a position that can be easily read by a person standing on the ground or on the base platform.

(5)

All plates must contain the following information:

(a)

Name and address of manufacturer and model number; and

(b)

The maximum and minimum inclination at which the metal tower is designed to operate.

(6)

In addition, all identification plates on metal towers manufactured after July 1, 1980, must contain the following information:

(a)

The maximum breaking strength and size of mainline for which the metal tower is designed;

(b)

The maximum breaking strength and size of haulback line for which the metal tower is designed;

(c)

The number, minimum breaking strength and size of guylines or any other lines required; and

(d)

If the metal tower is designed for a skyline, slackline, or modified slackline system, the maximum breaking strength and size of skyline, mainline and haulback line that can be used.

(7)

All metal towers must be operated within the manufacturer’s capacity:

(a)

As specified on the identification plate; or

(b)

As modified by the manufacturer; or

(c)

As designed and specified by a registered professional engineer.

(8)

If wire rope dimensionally larger in size or of a greater breaking strength than that specified by the yarder manufacturer is used for skyline, mainline, skidding line and/or haulback line, one of the following methods for limiting the load on the spar must be used:

(a)

A tamper-proof tension limiting device that automatically slacks the line loads (pull) on the metal tower to below its maximum identification plate rating.

(b)

A line fuse system installed in the skyline or mainline; or

(c)

Established operating procedures that limit line loads (pull) on the metal tower to below the maximum identification plate rating for the metal tower.

(9)

When a line fuse system is used to limit line loads (pull) on the metal tower:

(a)

The line fuse must have a designed breaking strength equal to or less than the maximum line rating of the metal tower as listed on its identification plate.

(b)

The line fuse must be certified and stamped as to the breaking strength.

(c)

The skyline or mainline must be hung in a single eye of the fuse link.

(d)

Notice must be given to crew personnel that line fuses are in use.

(10)

When operating procedures are used to limit line loads (pull) on the metal tower:

(a)

They must be observable or verifiable.

(b)

Any locking or dogging device on the brake or elsewhere must be removed or deactivated.

(c)

Personnel must be knowledgeable about the operating procedures that are in use to limit line loads.

(11)

Metal towers and their appurtenances must be inspected by a competent person each time the tower is lowered and at any time its safe condition is in doubt.

(12)

When damage from overstress or any other source is noted or suspected, the part in question must be inspected by a suitable method and found to be safe or the part repaired by a qualified person or replaced before the tower is again used.

(13)

Structural modifications or additions which affect the capacity or safe operation of metal towers must be made only under the direction of the manufacturer or a registered professional engineer. If such modifications or additions are made, the identification plate required in OAR 437-007-0690 (Metal Towers)(4), (5) and (6) must reflect such changes.

Source: Rule 437-007-0690 — Metal Towers, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=437-007-0690.

437‑007‑0001
Authority of Rules 437‑007‑0002
Purpose of Rules 437‑007‑0003
Scope of Rules 437‑007‑0004
Applicability of Rules 437‑007‑0010
Worker Protection Standard 437‑007‑0025
Definitions 437‑007‑0100
Safety and Health Program 437‑007‑0105
Management Commitment 437‑007‑0110
Supervisory Responsibilities 437‑007‑0125
Accident Investigation 437‑007‑0130
Employee Involvement 437‑007‑0135
Hazard Identification and Control 437‑007‑0140
Training 437‑007‑0145
Annual Program Evaluation 437‑007‑0200
Site Planning and Implementation 437‑007‑0205
Hazard Identification 437‑007‑0210
Checking System 437‑007‑0215
Working Alone 437‑007‑0220
Medical Services and First Aid 437‑007‑0225
Working Near Unstable Objects and Danger Trees 437‑007‑0230
Power Line Safeguards 437‑007‑0235
Working Conditions 437‑007‑0240
Night Logging 437‑007‑0245
Field Sanitation For Reforestation Activities 437‑007‑0300
General Requirements 437‑007‑0305
Head Protection 437‑007‑0310
High-Visibility Color 437‑007‑0315
Eye and Face Protection 437‑007‑0320
Hand Protection 437‑007‑0325
Leg Protection 437‑007‑0330
Foot Protection 437‑007‑0335
Hearing Protection 437‑007‑0340
Personal Floatation Devices 437‑007‑0345
Respiratory Protection 437‑007‑0350
Respiratory Protection When Machines Are Operated 437‑007‑0400
Hand and Portable Power-Driven Tools 437‑007‑0405
Chain Saws 437‑007‑0410
Fire Extinguishers 437‑007‑0415
Explosives and Blasting Agents 437‑007‑0500
Roads 437‑007‑0505
Bridges 437‑007‑0510
Flagging 437‑007‑0515
Signs 437‑007‑0520
Vehicle General Requirements 437‑007‑0525
Vehicle Warning Devices 437‑007‑0530
Vehicle Windshields, Windows and Mirrors 437‑007‑0535
Vehicle Passenger Compartments 437‑007‑0540
Vehicle Brakes 437‑007‑0545
Vehicle Exhaust Systems 437‑007‑0550
Vehicle Guards and Controls 437‑007‑0555
Vehicle Safety Chains 437‑007‑0560
Vehicle Seat Belts 437‑007‑0565
Vehicle Inspection, Maintenance and Repair 437‑007‑0570
Vehicle Operation 437‑007‑0575
Transportation of Personnel 437‑007‑0580
Flammable and Combustible Liquids 437‑007‑0600
Inspection and General Requirements for Rigging 437‑007‑0605
Out-of-Service Requirements for Wire Rope 437‑007‑0610
Line Cutting and Splicing 437‑007‑0615
Pressed Eyes and End Fittings 437‑007‑0620
Cable Clamps 437‑007‑0625
Mollies 437‑007‑0630
Connectors 437‑007‑0635
Shackles 437‑007‑0640
Metal Spar Guyline Safety Straps 437‑007‑0645
Chokers and Straps 437‑007‑0650
Guylines — General Requirements 437‑007‑0655
Guylines — Tail Tree Guying 437‑007‑0660
Intermediate Support Trees 437‑007‑0665
Anchoring 437‑007‑0670
Spiking and Releasing Spiked Guylines or Skylines 437‑007‑0675
Selecting, Preparing and Rigging Trees 437‑007‑0680
Blocks and Hanging Blocks. 437‑007‑0690
Metal Towers 437‑007‑0700
General Work Practices 437‑007‑0705
General Machine Operator Requirements 437‑007‑0710
General Machine Requirements 437‑007‑0715
Attaching and Spooling Line (Wire or Synthetic Rope) 437‑007‑0720
Fairleads 437‑007‑0725
Securing Machines. 437‑007‑0730
Loading Machines 437‑007‑0735
Chippers 437‑007‑0740
Machine Exhaust Systems 437‑007‑0745
Windows and Windshields on Machines 437‑007‑0750
Drum Brakes 437‑007‑0755
Machine Travel Brakes 437‑007‑0760
Outriggers 437‑007‑0765
Hauling or Moving Machines 437‑007‑0770
Protective Structure for Operators, General Requirements 437‑007‑0775
Protective Structure For Operators, Machines Manufactured On Or After July 1, 2004 437‑007‑0780
Protective Structures for Operators, Machines Used On Or After July 1, 2014 437‑007‑0800
General Requirements 437‑007‑0805
Mechanical Falling 437‑007‑0810
Manual Falling 437‑007‑0815
Wedges 437‑007‑0820
Bucking Trees/Logs 437‑007‑0825
Tree Jacking 437‑007‑0830
Tree Pulling 437‑007‑0900
General Landing Work Practices 437‑007‑0905
Landings 437‑007‑0910
Landing Logs 437‑007‑0915
Log Decks 437‑007‑0920
General Cable Yarding and Ground Skidding Work Practice 437‑007‑0925
Cable Yarding Work Practices 437‑007‑0927
Working Near Standing Tree Anchors, and Tail/Intermediate Support Trees 437‑007‑0930
Grapple Yarding 437‑007‑0935
Operation of Ground Skidding Machines and Vehicles 437‑007‑0940
Signaling and Communications 437‑007‑0945
Electrical Signal Systems 437‑007‑0950
Voice Communication on Combined Signal/Voice Transmitters 437‑007‑1000
General Requirements 437‑007‑1005
Loading 437‑007‑1010
Securing Loads for Transport 437‑007‑1015
Binders and Wrappers 437‑007‑1020
Log Truck General Requirements 437‑007‑1025
Log Truck Safety Chains or Cables 437‑007‑1030
Log Truck and Trailer Hitches (Couplings) 437‑007‑1035
Log Truck and Trailer Brakes 437‑007‑1040
Log Truck Trailer Reaches and Drawbars 437‑007‑1045
Log Truck Trailers 437‑007‑1050
Log Truck and Trailer Bunks and Stakes 437‑007‑1055
Log Truck and Trailer Bunk Chains and Cables 437‑007‑1060
Additional Requirements for Log Trucks Equipped With Self-Loaders 437‑007‑1100
General Work Practices 437‑007‑1105
General Requirements for Log and Wood Fiber Unloading, Handling and Storage Areas 437‑007‑1110
Wrappers Removal General 437‑007‑1115
Barriers For Securing Log Loads 437‑007‑1120
Removing Wrappers From Barrier Secured Loads 437‑007‑1125
Removing Wrappers From Machine Secured Loads 437‑007‑1130
Removing Center Wrappers From Unsecured Loads 437‑007‑1135
Unloading Logs 437‑007‑1140
Split Loads 437‑007‑1145
Loading or Unloading Trailers 437‑007‑1150
Trailer Hoists 437‑007‑1155
Dry Land Log and Fiber Handling and Processing 437‑007‑1160
Water Dumps, Log Ponds and Booms 437‑007‑1165
Boats 437‑007‑1200
Helicopter Operation 437‑007‑1205
Aircraft Refueling/Maintenance Area 437‑007‑1300
Scope of Rules 437‑007‑1303
Application of Rules 437‑007‑1305
General Requirements 437‑007‑1310
Personnel Assignments 437‑007‑1315
Single Personnel Assignments 437‑007‑1320
Personal Protective Equipment 437‑007‑1325
Training 437‑007‑1330
Equipment, Vehicles and Machines, General Requirements 437‑007‑1335
Vehicle Operation 437‑007‑1340
Machine Operation 437‑007‑1345
Helicopter Operations 437‑007‑1400
Jerk Wire Whistle System 437‑007‑1405
Radio Signal Systems 437‑007‑1500
Tree Climbing General Requirements 437‑007‑1505
Climbing Equipment General Requirements 437‑007‑1510
Climbing Procedures General Requirements 437‑007‑1515
Rigging Trees for Cable Logging Systems 437‑007‑1520
Four Inch Tie-In Systems 437‑007‑1525
Belayed (Snubbing) Climbing System 437‑007‑1530
Three Point Climbing System 437‑007‑1535
Storage and Transportation of Climbing Equipment General Requirements
Last Updated

Jun. 8, 2021

Rule 437-007-0690’s source at or​.us