# HANDLING OF MATERIALS
> MSHA accident `220110320004` · 01/13/2011 · 3M Company
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** HANDLING OF MATERIALS
- **Accident type:** Over-exertion NEC
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Machine maintenance
- **Injury source:** METAL,NEC(PIPE,WIRE,NAIL)
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** BACK (MUSCLES/SPINE/S-CORD/TAILBONE)
- **Days lost:** 0
- **Mine experience:** 16.48 years
## Operator
- **Controller:** Minnesota Mining & Manufacturing Company
- **Operator:** 3M Company
- **Mine:** [4702918](https://api.ai-analytics.org/mine/4702918)
## Narrative

Strained back while assembling hub nut on 4 Roll.  Hub nut weighs about 150 lbs. A crane is used to get the hub nut close to the shaft, but then it requires a person to lift/position/turn nut onto shaft.  The shaft and nut were positioned about 32 inches off of ground.  In this process, employee felt a pain in low left back and down into his left leg.

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*Source: [MSHA Open Government Data](https://arlweb.msha.gov/OpenGovernmentData/) · AI Analytics · CC0 1.0*