OSHA Instruction STD 1-3.3 CH-1 NOV 12 1985 Directorate of Field Operations

Subject: Page Change for OSHA Instruction STD 1-3.3

A. Purpose. This instruction transmits a page change to OSHA Instruction STD 1-3.3, November 1, 1982.

B. Scope. This instruction applies OSHA-wide.

C. Action. Replace pages 1 and 2 of OSHA Instruction STD 1-3.3, November 1, 1982, with the attached new pages. File this transmittal page after the signature page of the instruction.

D. Explanation. The reference to OSHA Instruction CPL 2.11A has been changed to the Field Operations Manual (FOM), OSHA Instruction CPL 2.45A. The guidelines on de minimis violations were incorporated into the FOM thereby canceling OSHA Instruction CPL 2.11A in an OSHA Notice CPL 2 which was issued on April 11, 1983. This instruction does not apply to two-point suspension scaffolds which are appropriately covered in the General Industry standard, 29 CFR 1910.28.

Patrick R. Tyson Acting Assistant Secretary

DISTRIBUTION: National, Regional and Area Offices Compliance Officers State Designees 7(c)(l) Project Managers NIOSH Regional Program Directors

OSHA Instruction STD 1-3.3 CH-1 NOV 12 1985 Directorate of Field Operations

Subject: Building Anchors Used for Intermittent Stabilization of Suspended Powered Platform in Window Washing Operations and Light Building Maintenance

A. Purpose. This instruction provides guidance to ensure appropriate enforcement of certain requirements pertaining to powered platforms for exterior straight face building maintenance. This instruction does not apply to construction nor to two-point suspension scaffolds used in general industry. Requirements for scaffolds used in construction are contained in 29 CFR 1926.451, and general industry application of two-point scaffolds are contained in 29 CFR 1910.28.

B. Scope. This instruction applies OSHA-wide.

C. Reference. OSHA Instruction CPL 2.45A, April 18, 1983.

D. Action. OSHA Regional Administrators and Area Directors shall ensure that the guidelines in this instruction are adhered to in complying with 29 CFR 1910.66(b)(3), Powered Platforms for Exterior Building Maintenance.

E. Federal Program Change. This instruction describes a Federal program change which affects State programs. Each Regional Administrator shall:

1. Ensure that this change is forwarded to each State designee.

OSHA Instruction STD 1-3.3 NOV 1 1982 Office of Compliance Programming

2. Explain the technical content of the change to the State designee as requested.

3. Ensure that State designees are asked to acknowledge receipt of this Federal program change in writing, within 30 days of notification, to the Regional Administrator. This acknowledgment should include a description either of the State's plan to implement the change or of the reasons why the change should not apply to that State.

4. Review Policies, instructions and guidelines issued by the State to determine that this change has been communicated to State program personnel. Routine monitoring activities (accompanied inspections and case file reviews) shall also be used to determine if this change has been implemented in actual performance.

F. Guidelines.

1. Intermittent Tie-in Stabilization System. The building anchor system will be installed as described herein.

a. The building anchors will be located in vertical rows, with an attachment of maximum elevation at every third floor (approximately 45 feet) and spaced horizontally to allow a stabilization attachment for each of the two platform suspension wire ropes. The minimum tensile strength of the anchor bolt shall be 600 pounds.

b. As the suspended platform descends past the elevation of each anchorage, each of the two platform occupants will secure a "quick connect - quick disconnect stabilizer-tie" between a suspension wire rope and a building anchor. Each stabilizer-tie will contain an adjustable lanyard to allow positioning each suspension wire rope vertically at a predetermined angulation that will provide at least 10 pounds of pressure against the building at the lowest point of the tie-in span. The process will be repeated as each elevation of tie-in anchorage is reached during the descent of the platform.