A description of the proposed changes are as follows:
INDUSTRY SAFETY ORDERS
INFORMATIVE DIGEST OF PROPOSED ACTION/PLAIN ENGLISH OVERVIEW
Section 4307.1. Miter Saws.
A new section 4307.1, Miter Saws, is proposed for GISO, Article 59, that will contain the guarding requirements unique to miter saws. The proposal will include portions of the ANSI/UL 987-1996 consensus standard with modifications for clarity. The proposed regulation will provide the Division with an enforceable regulation consistent with the manufacturing and design features of miter saws currently available on the market. The proposal will have no effect upon the regulated public as these saws are designed and manufactured for sale consistent with the guarding requirements contained in the proposal.
Proposed subsection (a)(1) provides language to require that with the carriage in the full cut position (depicted in Figures A and B of the regulation), the upper half of the blade and at least 50 percent of the arbor end shall be guarded. An exception is proposed to allow the guard to have an opening for the ejection of sawdust, provided it meets specific requirements.
Proposed subsection (a)(2) will require the employer to ensure that power to the saw is disconnected before employees clean or unjam the guard opening for the ejection of sawdust.
Proposed subsections (a)(1) & (2) will provide consistency with the ANSI/UL 987 requirements and will have the effect of protecting workers from the rotating teeth of the upper half of the saw blade.
Proposed subsection (b) contains language that requires the lower blade teeth to be guarded when the saw carriage is in the full retract (raised) position (depicted in Figures A and B of the regulation). Several exceptions to the regulation are proposed. One exception permits an opening in lower blade guards (designed to make contact with the material being cut) so that the blade teeth can make contact with the material being cut. A second exception allows for an opening in the lower blade guard for motor shaft clearance. A third exception permits a portion of the lower blade quadrant furthest away from the operator side of the saw to be exposed to provide optimum functioning of lower blade guards designed to make contact with the stock or material being cut.
The proposed regulation will provide consistency with the ANSI/UL 987 requirements and have the effect of protecting workers from contacting the lower blade teeth when the saw is in the full retract (raised) position. Employers currently using miter saws with defective or missing lower blade guards will need to ensure that lower blade guards are installed, operational, and used per the manufacturers recommendations.
Proposed subsection (c) requires employers to instruct employees to keep their hands and fingers outside the area below the blade until the blade has come to a complete stop. This subsection provides a safe work practice as a precautionary requirement and will have the effect of protecting workers in the unlikely event that the saw blade would inadvertently drop from the retract (raised) position due to a component failure in the structural support for the saw carriage.
DOCUMENTS INCORPORATED BY REFERENCE