Scissors lift

Cut around the perimeter of the area opaca with Vannas scissors, lift out the embryo with a prewetted spatula, and place into fix (usually 4% w/v paraformaldehyde in PBS, but this varies with application). 

When servicing a scissor lift, the table should be retained in the elevated position by chocking the moving wheels in the base. Do not, repeat not, attempt to chock the table since this can tilt upwards and allow the scissor mechanism to close. 

For fall protection you can only use a body belt as a positioning device. For aerial lifts where fall restraint is required, a body belt, meeting the requirements of 1926.502(e), is acceptable. When using scissors lifts that go straight up and down and do not bounce, a guardrail is acceptable (no body belt needed). 

Scissors lifts are common equipment on jobsites. They are used to safely lift workers, tools, and materials to various heights. They are also considered to be mobile scaffolding. 

There has been some confusion as to whether scissors lifts are considered to be aerials lifts. In 1998 OSHA acknowledged in a Letter of Interpretation that there is confusion regarding scissors lifts and the appropriate standards governing such equipment. 

The mix-up stemmed from the way OSHA s directive (CPL 2-1.23— Inspection Procedures for Enforcing Subpart L, Scaffolds Used in Construction) is worded. That directive stated that scissors lifts are addressed by 29 CFR 1926.453— Aerial lifts, and not by 1926.452(w)—Mobile scaffolds. 

Employees using scissors lifts need to be qualified to operate the equipment. 

Employees on a scissors lift must be protected by a guardrail system capable of withstanding, without failure, a force applied in any downward or horizontal direction at any point along its top edge of at least 200 pounds. Scissors lifts are usually manufactured with guardrail systems. If the guardrail system meets the minimum 200 pound toprail capacity, then employees don t need to wear personal fall arrest equipment. 

Employees do not have to tie-off on scissors lifts equipped with guardrails. They are required to tie-off when in the scissor lift basket if there is the chance they could be bounced out of the basket, or to keep them from climbing out of the basket. 

The scaffolding regulation has its own training requirements (1926.454). All of the requirements for scaffolds also pertain to scissors lifts. 

OSHA has stated that it may refer to industry consensus standards such as ANSI A92.3, Manually Propelled Elevating Aerial Platforms and ANSI A92.6, Self-Propelled Elevating Work Platforms to enforce abatement of serious safety hazards involving scissor lifts. 

Spend time on those types of scissors lifts that you use. Go over fall the protection requirements. If yom employees are going to need fall protection, then go over the types of fall protection they will be using. 

OSHA Letter of Interpretation, 05/22/1998—Seatbelts for forklifts fall protection for scissors lifts. 

This sign-off sheet documents the names of employees who attended this training session on Scaffolding — Scissor Lifts at this company,. ... 

Objects falling off building roofs, scaffolding, aerial lifts, scissors lifts, cranes, and forklifts can strike employees working nearby. The objects could be tools, brick, pipe, lumber, and other items. Gravity will cause the object to travel with speed and force. Broken bones and puncture injuries can occur. 

As is common for many schools and football teams, coaches capture player practice drill performance with elevated video cameras. A camera operator often stands on an elevated surface. Frequently, hydrauUc scissor lifts provide the surface for video cameramen. 

Schools may have to re-think how they film events, in fight of a hazard alert about scissor lifts issued last month by OSHA. The portable, hydrauhc-powered lifts are frequmtly used by high schools and colleges to film athletic and band activities. 

The alert follows the death of a 20-year-old University of Notre Dame student worker last October. Declan Sulhvan was filming the school s football practice from atop a scissor lift when it was toppled by high winds, smding him plummeting to his death. Sullivan, who reportedly was not trained to properly operate the equipment, raised the lift more than 39 feet into the air on a day in which winds exceeded 50 miles per hour. Notre Dame conducted an investigation and ultimately cleared its staff of any wrongdoing (www.ishn.com article 4/20/11). 

According to the Center for Construction Research Training, an average of 26 construction workers die each year from using aerial lifts, which include elevated platforms such as scissor lifts. With aerial lifts, the major causes are falls, electrocutions, and collapses or tipovers. The OSHA alert on scissor lifts cautions that using the... 

Q. What standards cover scissor lifts that have extendable platforms ... 

A. There has been some confusion as to which OSHA standards apply to the use of scissor lifts. The aerial lift requirements ( 1926.453) incorporate by reference the definition of aerial lifts used in the American National Standards Institute (ANSI) A92.2-1969 standard. Therefore, the requirements in 1926.453 apply to equipment identified in that 1969 ANSI consensus standard as aerial lifts. The ANSI standard definition includes the following vehicle-mounted elevating and rotating work platforms extensible boom platforms, aerial ladders, articulating boom platforms, vertical towers, and a combination of any of the above. 

Scissor lifts, including those with platforms that extend beyond the equipment s wheelbase, do not fall within any of these categories. Therefore, scissor lifts are not addressed by the aerial lift provisions of Subpart L. While there are no OSHA provisions that specifically address scissor lifts, they do meet the definition of a scaffold in 1926.451, general requirements for scaffolds. Employers must therefore comply with the other applicable provisions of Subpart L when using scissor lifts. For example, since scissor lifts are mobile, the specific requirements for mobile scaffolds in the scaffold standard ( 1926.452(w)—mobile scaffolds) must be met. 

Q. Are employees required to be tied-off when working on a guardrail-equipped scissor lift platform that extends beyond the wheelbase of the lift ... 

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