Mechanical contractors · Tennessee

Rock City Mechanical Company, LLC

Name: Rock City Mechanical Company, LLC Workplace Safety Data
Creator: PlainSafetyScore
License: https://creativecommons.org/publicdomain/zero/1.0/

Nashville, TN · ~140 workers · 4 years of OSHA Injury Tracking Application data.

Compiled by PlainSafetyScore · August 25, 2026

B
Good Safety Record: 1.7
Avg TCR: 2.8
Industry avg: 0
Fatalities

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The verdict

Rock City Mechanical Company, LLC runs at 60% of its industry's injury rate - safer than the typical Mechanical contractors workplace, earning a grade B.

Rock City Mechanical Company, LLC: 1.7 TCR = 60% of Mechanical contractors BLS 2.8 · 4y Form 300A (see methodology below)

Rock City Mechanical Company, LLC safety composite

Rock City Mechanical Company, LLC scores strongest on total case rate (tcr) (safer than 74% of same-industry peers) and weakest on dart rate (safer than 29%), blended into one 0-100 breakdown against same-industry peers. A missing measure drops out and redistributes its weight rather than deflating the score. This is a per-dimension breakdown, distinct from the single letter grade above it (which weights TCR alone against the BLS industry benchmark).

53/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR): C 1.68 per 100 workers

Safer than 74% of industry peers
DART rate: F 2.97 per 100 workers

Safer than 29% of industry peers
Fatalities: D 0

Safer than 51% of industry peers

Benchmarked live against every credibly-rated employer in the same NAICS industry code in the current OSHA extract (a segment must have at least 8 rated peers to benchmark). Not a legal or compliance determination; PlainSafetyScore's own weighting (TCR 40%, DART 35%, fatalities 25%).

Rising injury rate

Rock City Mechanical Company, LLC: 0.0 → 3.0 TCR

Peak year 2024 @ 3.0 TCR · DART/TCR 1.77× in 2024

Rock City Mechanical Company, LLC's TCR rose 3.0 from 0.0 in 2021 to 3.0 in 2024. In 2024, DART was 1.77× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 238220 · Nashville, TN AT/BELOW-IND · MID

Grade B · TCR 1.7 · 60% of ind

DART 3.0 DART
RANK #27/117
PHOTO Peck Hannaford + Bri…
BOOK 4y book
INJ 10 inj
SIZE ~140 FTE

Nearest TCR peer: Peck Hannaford + Briggs Company (0.0 TCR gap)

Read with this employer → · Industry book → · Tennessee employers → · Look up another →

This site

1.7
Peck Hannaford

1.7
HACI Mechanica

1.7
Chris' Plumbin

1.7
R.F. Warder, I

1.7

What this shows Rock City Mechanical Company, LLC averages 1.7 TCR (60% of the Mechanical contractors BLS benchmark).

Rock City Mechanical Company, LLC TCR series: 2021=0 · 2022=2.4 · 2023=1.4 · 2024=3 · BLS 2.8

Where Rock City Mechanical Company, LLC falls in its industry

5,793 Mechanical contractors establishments

Safer than 74% of graded establishments in this industry, whose median TCR is 3.3.

Grade B

More dangerous than peersSafer than peers

Narrower to Tennessee alone (the establishments it most directly competes with for workers and contracts): ranked #27 safest of 117 Mechanical contractors employers in Tennessee.

Rock City Mechanical Company, LLC (140 employees, TCR 1.7) among 29 same-industry peers, split at the industry median of 60 employees and a TCR of 3.3

Rock City Mechanical Company, LLC has more employees than the Mechanical contractors median and a lower injury rate than the industry's median TCR of 3.3. Workforce size and injury rate do not always move together within the same industry -- some of its smaller peers run higher rates than its larger ones, and vice versa.

Year-by-Year Safety Data

Year	TCR	DART	Injuries
2024	3.0	3.0	4
2023	1.4	0.0	2
2022	2.4	1.2	4
2021	0.0	0.0	0

OSHA ITA peer cross-reference

Establishment peer ledger

238220 · TN · Nashville

5,793 Mechanical contractors employers nationwide with a credible TCR · 10,743 rated employers in Tennessee with headcount on file · 1,187 employers in Nashville, TN · 4 cross-state NAT-TCR peers · 4 cross-state NAT-SIZE peers. Closest matches by relationship code are listed below.

Rel	Establishment	Place	Metric
NAICS-TCR	Peck Hannaford + Briggs Company	CINCINNATI, OH	1.7 TCR
NAICS-TCR	HACI Mechanical Contractors, Inc.	PHOENIX, AZ	1.7 TCR
NAICS-TCR	Chris' Plumbing, Inc.	HAYWARD, CA	1.7 TCR
NAICS-TCR	R.F. Warder, Inc.	WHITE MARSH, MD	1.7 TCR
STATE-SIZE	LQM	GREENVILLE	140 FTE
STATE-SIZE	Mrs. Grissom's Salads, Inc.	NASHVILLE	140 FTE
STATE-SIZE	Pratt Industries	HUMBOLDT	140 FTE
STATE-SIZE	ABC INOAC Exterior Systems	LIVINGSTON	140 FTE
CITY-NEAR	Parallon Enterprises, LLC	Nashville	15,267 FTE
CITY-NEAR	METROPOLITAN GOVT. OF NASHVILLE,& DAVIDSON COUNTY	Nashville	10,278 FTE
CITY-NEAR	METRO NASHVILLE PUBLIC SCHOOLS	Nashville	9,049 FTE
CITY-NEAR	TriStar Centennial Medical Center	Nashville	3,106 FTE
NAT-TCR	Dalton State College	Dalton, GA	1.7 TCR
NAT-TCR	Retail - Laurel	Laurel, DE	1.7 TCR
NAT-TCR	Stockton - Frozen Food Express Industries, Inc. / FFE Transportation	Stockton, CA	1.7 TCR
NAT-TCR	Stemmle Plumbing Repair, Inc.	Midlothian, VA	1.7 TCR
NAT-SIZE	Concord Place	Northlake, IL	140 FTE
NAT-SIZE	Ohio Living - Swan Creek	Toledo, OH	140 FTE
NAT-SIZE	Surgical Instrument Manufacturers Inc	Fenton, MO	140 FTE
NAT-SIZE	Dfa Distributing West - Houston Tx	Houston, TX	140 FTE

Rel codes: NAICS-TCR · STATE-SIZE · CITY-NEAR · NAT-TCR/NAT-SIZE cross-state. Read with this employer →

Data Source: OSHA Injury Tracking Application (ITA), mandatory establishment-level injury/illness reports. Grades compare employer Total Case Rate (TCR) to BLS IIF industry benchmarks. Data covers years reported by this establishment: 2024, 2023, 2022, 2021. This is publicly available government data - not a legal determination of workplace conditions.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from official public datasets. See our methodology for details.