Rochester, MN —
OSHA Injury Report: Tonna Mechanical, Inc.
Injury · Days away from work
At a glance
On , an injury at Tonna Mechanical, Inc. in Rochester, MN 559010831 resulted in days away from work. Employee was residential HVAC Installer in plumbing and heating contractors.
Where did this happen?
- Establishment
- Tonna Mechanical, Inc.
- Parent company
- Tonna Mechanical, Inc.
- Street
- 1440 Industrial Dr NW
- City
- Rochester
- State
- MN
- ZIP
- 559010831
- On-site location
- Jobsite -- basement Stairs
What was the outcome?
- Outcome
- Days away from work (code 2)
- Type
- Injury (code 1)
- Days away from work
- 16
- Days restricted or transferred
- 20
Before the incident
The employee was transporting a cast iron boiler into the basement of a residence using an appliance cart. The employee was positioned at the lower end of the boiler and cart while another employee assisted from the upper end.
What happened
While descending the basement stairs with the boiler and appliance cart the employee experienced a twisting motion to the knee near the bottom of the stairs.
Injury or illness
Right knee strain.
Object or substance involved
Cast iron boiler basement stairs.
Summary line
Right knee strain while carrying cast iron boiler down basement stairs
Employee and industry
- Job description
- Residential HVAC Installer
- SOC code
- 49-9021 — Heating, Air Conditioning, and Refrigeration Mechanics and Inst
- NAICS code
- 238220 — Plumbing and heating contractors
- NAICS vintage
- 2022
- Avg employees
- 91
- Total hours worked
- 162038
- EIN
- 411269382
- Establishment ID
- 1436326
- Employer case #
- 1
When (timing detail)
- Date of incident
- Shift started
- 7:05
- Time of incident
- 14:00
- Filing year
- 2025
- Submitted
- 22JAN26:17:08:00
Source
Data from OSHA ITA Form 300/301 electronic submissions, filing year 2025. ITA Case Detail records are establishment-reported submissions, not OSHA inspections — no per-record IMIS deep link exists.