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RA-49 - Manbasket Risk Assessment

New Post has been published on http://entirelysafe.com/manbasket-risk-assessment/

RA-49 - Manbasket Risk Assessment

What is Manbasket Operation

The crane basket, a crane supported man basket, also referred to as a suspended personnel platform, crane cage and construction basket, is designed, manufactured and tested to meet all Federal and OSHA regulations related to overhead lifting. Please view the following link of OSHA 29CFR for rules, regulations and testing requirements on crane baskets.

Manbasket Operations Hazards

Working at height;

Open areas in the basket;

Overhead lines;

Unsecured tools at height;

Height phobia (acrophobia)

Basket anchoring points – missing; inadequate strength;

Harness anchoring points – missing; inadequate strength;

Adverse weather – severe storm / sand storm;

Concurrent activity;

Crane malfunction;

Crane movement;

Pinch points;

Uneven working platform;

Miscommunication;

Insufficient lighting;

Manbasket Hazard Effects

Falling from height resulting in serious injury or possible death.

Dropping tools causing property damage or injury to personnel below;

Dropped basket;

Loss of control/stability;

Caught between structure and basket;

Personnel stuck at height;

Pinching hands & fingers between door and frame;

Electrocution;

Panic;

Slippery work area;

Emergency switch in the basket overridden;

Unawareness of hazards related to task in hand;

Manbasket Hazard Controls

Equipment:

Pre-use check and inspection of fall protection PPE.

Fall protection PPE register and regular inspection and maintenance;

Drops – tethered tools;

Provision and wearing of fit for purpose PPE and fall protection equipment.

Purchase of harnesses from reputable manufacturer

Discarding harness on regular basis

Provision of anchor points

Pouches for Radios to be used;

Provide adequate lighting;

Basket

Gyroscope to keep basket level;

Door opening inside;

Failsafe door locking mechanism;

Emergency switch in the basket;

Kickboard around basket;

People:

Training for attachment &use of Manbasket;

Training of personnel for working at height;

Buddy system;

Clearly identifiable SWL;

Manufacturers certification;

Process:

Work at height is covered by PTW

Toolbox talk to define tasks; roles & responsibilities; identifying potential hazards.

Drops – No Go Zone below the basket;

Control of personnel movement below

Establish mean of communication – radio; hand signal etc.

Supervision.

Pre-operation Emergency button function test;

Basket regular inspection by approved lifting equipment inspection authority;

Procedure addressing Crane-Basket interface;

Manbasket Control Failure Recovery

Alternative crane use to retrieve person struck in the Basket

Connection of basket controls to rig HPU as backup

Provision for crane boom lowering mechanism to Rig HPU if Crane HPU fails;

Basket Emergency button override switch in the Crane Cabin;

ER Procedures & Team

Trained Medic and medical facility

Evacuation vehicle

Good Practices

Incidents

Download File RA Database

#Crane Manbasket #Manbasket #Risk Assessment

Justification for using Manbasket on Land Rigs and Hoists

New Post has been published on http://entirelysafe.com/manbasket-land-rigs-hoists/

Justification for using Manbasket on Land Rigs and Hoists

The purpose of the article is to clarify the safety related points of Manbasket usage onland Rigs and Hoists.

Crane vs Mobile Elevated Working Platform (MEWP)

MEWP practically cannot be used for land Rig/Hoist operations for few reasons:

It cannot reach areas on the MAST/DERRICK as it is designed only for vertical movements to reach areas only within the boundary of its base. If used ‘Overreaching’ Unsafe Act can come up.

MEWP Cannot reach height of the Mast/Derrick higher levels

It is not financially feasible to keep Crane/Forklift and MEWP on the Units, as Crane/Forklift cannot removed from service completely, i.e. need a mean for lifting loads

Crane Safety systems

Crane is designed for lifting, and in case of Manbasket it is used as per design for lifting.

Cranes are equipped with many Safety systems that include but not limited to:

Weight Indicator

Drum cable layer limit

Boom hoist limit

Block hoist limit

Drum layer

Slew limits (offshore) – is restriction to slew the crane boom to avoid collapsing with derrick, which is available with very expensive onboard computer equipped latest cranes. – NA to land cranes

Heave compensator for cable (offshore) – is spooling block in and out based on the load weight which can change due vessel movement on the waves, which is available with very expensive onboard computer equipped latest cranes. – NA to land cranes

Manriding mode (Offshore) – is a slow movement of the crane, which is available with very expensive onboard computer equipped latest cranes.

Successful Precedence of Manbasket in the industry – Justification for use

Manbasket are widely used (daily 2 times a day, 5 lifts each, 4 people each) in Offshore to transfer personnel to/from the crew change vessels.

As well as daily use for all work at height activities including daily Preventive Maintenance, painting etc.

Additional to our use, there is an additional sling attached from basket immediately to headache ball of the whip line.

Manbasket proved to be much safer than manriding activity conducted by using Manriding winch.

On Land rigs where Mast can be accessed from outside of the Mast perimeter, Manbasket is safest method of access.

On offshore rigs where the Derricks are enclosed, Manriding winch as well as In-Derrick Cherry Picker are used.

Manbasket Risk Assessment

Hazard Consequence Control Recovery