Mechanical contractors · Tennessee

Del-Air Mechanical

Knoxville, TN · ~151 workers · 5 years of OSHA Injury Tracking Application data.

D
Poor Safety Record
3.9
Avg TCR
2.8
Industry avg
0
Fatalities
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The verdict

Del-Air Mechanical runs at 140% of its industry's injury rate - more dangerous than the typical Mechanical contractors workplace, earning a grade D.

Del-Air Mechanical: 3.9 TCR = 140% of Mechanical contractors BLS 2.8 · 5y Form 300A (see methodology below)

Del-Air Mechanical safety composite

Del-Air Mechanical scores strongest on dart rate (safer than 54% of same-industry peers) and weakest on total case rate (tcr) (safer than 44%), 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).

D

49/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
D 3.93 per 100 workers

Safer than 44% of industry peers

DART rate
D 0.87 per 100 workers

Safer than 54% 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

Del-Air Mechanical: 3.2 → 6.9 TCR

Peak year 2022 @ 6.9 TCR · DART/TCR 0.22× in 2022

Del-Air Mechanical's TCR rose 3.7 from 3.2 in 2016 to 6.9 in 2022. In 2022, DART was 0.22× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 238220 · Knoxville, TN ABOVE-IND · MID

Grade D · TCR 3.9 · 140% of ind

  • DART 0.9 DART
  • RANK #72/117
  • PHOTO HB Home Services
  • BOOK 5y book
  • INJ 32 inj
  • SIZE ~151 FTE

Nearest TCR peer: HB Home Services (0.0 TCR gap)

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

Del-Air Mechanical in the TCR neighbourhood

Average Total Case Rate among this establishment and nearest same-industry peers

TCR

What this shows Del-Air Mechanical averages 3.9 TCR (140% of the Mechanical contractors BLS benchmark).

Source U.S. Department of Labor, OSHA Injury Tracking Application (Form 300A) As of 2026-08-25

Del-Air Mechanical TCR series: 2016=3.2 · 2017=4.2 · 2018=2.8 · 2021=2.6 · 2022=6.9 · BLS 2.8

Where Del-Air Mechanical falls in its industry

5,793 Mechanical contractors establishments

Safer than 44% of graded establishments in this industry, whose median TCR is 3.3.

More dangerous than peersSafer than peers

Narrower to Tennessee alone (the establishments it most directly competes with for workers and contracts): ranked #72 safest of 117 Mechanical contractors employers in Tennessee.

Del-Air Mechanical (151 employees, TCR 3.9) among 29 same-industry peers, split at the industry median of 60 employees and a TCR of 3.3 2×2 strategic matrix plotting 30 entities by Average employees (X) and Total Case Rate (Y), with a crosshair dividing the plot into four quadrants. Larger & higher-riskSmaller & higher-riskLarger & saferSmaller & safer than peers 050100150200250 05101520 Average employees Total Case Rate Del-Air Mechanical
Del-Air Mechanical (151 employees, TCR 3.9) among 29 same-industry peers, split at the industry median of 60 employees and a TCR of 3.3

Del-Air Mechanical has more employees than the Mechanical contractors median and a higher 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 Illnesses Fatalities
2022 6.9 0.9 8 0 0
2021 2.6 0.0 4 0 0
2018 2.8 0.6 5 0 0
2017 4.2 0.0 10 0 0
2016 3.2 0.7 5 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

238220 · TN · Knoxville

5,793 Mechanical contractors employers nationwide with a credible TCR · 10,743 rated employers in Tennessee with headcount on file · 747 employers in Knoxville, TN · 4 cross-state NAT-TCR peers · 4 cross-state NAT-SIZE peers. Closest matches by relationship code are listed below.

Rel Establishment Metric
NAICS-TCR HB Home Services 3.9 TCR
NAICS-TCR Nieman Plumbing, Inc. 3.9 TCR
NAICS-TCR T A Woods 3.9 TCR
NAICS-TCR Total Fire 141 3.9 TCR
STATE-SIZE Mechanical Systems Company, LLC 151 FTE
STATE-SIZE IATRIC Manufacturing Solutions 151 FTE
STATE-SIZE Wm. S. Trimble Co., Inc. 151 FTE
STATE-SIZE CHPS "Lavergne Pack 151 FTE
CITY-NEAR Cellular Sales Services Group LLC 6,387 FTE
CITY-NEAR University Health System, Inc 5,215 FTE
CITY-NEAR Functional Pathways of TN LLC 2,258 FTE
CITY-NEAR HES Facilities Services K-12 2,157 FTE
NAT-TCR S04065 - WM of KS - Wichita 3.9 TCR
NAT-TCR Priority Chevrolet 3.9 TCR
NAT-TCR Ihop 1514 3.9 TCR
NAT-TCR Stop & Shop Store 2403 3.9 TCR
NAT-SIZE West Fraser Augusta Lumber Mill 151 FTE
NAT-SIZE Ward Leonard CT LLC 151 FTE
NAT-SIZE Harmony Hall Nursing & Rehabilitation Center 151 FTE
NAT-SIZE Burlington Medical LLC 151 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: 2022, 2021, 2018, 2017, 2016. 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.