Air system balancing and testing · Maryland

Knott Mechanical Inc.

Lutherville Timonium, MD · ~81 workers · 3 years of OSHA Injury Tracking Application data.

A
Excellent Safety Record
0.8
Avg TCR
2.8
Industry avg
0
Fatalities
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The verdict

Knott Mechanical Inc. runs at 30% of its industry's injury rate - far safer than the typical Air system balancing and testing workplace, earning a grade A.

Knott Mechanical Inc.: 0.8 TCR = 30% of Air system balancing and testing BLS 2.8 · 3y Form 300A (see methodology below)

Knott Mechanical Inc. safety composite

Knott Mechanical Inc. scores strongest on total case rate (tcr) (safer than 90% of same-industry peers) and weakest on fatalities (safer than 51%), 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).

B

77/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
A 0.85 per 100 workers

Safer than 90% of industry peers

DART rate
B 0 per 100 workers

Safer than 80% 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%).

TCR Δ

−2.5

2022→2024

Knott Mechanical Inc. injury rate improved

Knott Mechanical Inc.'s TCR fell 2.5 from 2.5 in 2022 to 0.0 in 2024. Peak filing year was 2022 at 2.5 TCR. In 2024, DART was 0× this establishment's average TCR (severity share of cases).

2022=2.5 · 2023=0.0 · 2024=0.0

OSHA ITA Form 300A scorecard

Establishment book 238220 · Lutherville Timonium, MD AT/BELOW-IND · SMALL

Grade A · TCR 0.8 · 30% of ind

  • DART 0.0 DART
  • RANK #15/121
  • PHOTO Harris Las Vegas, LLC
  • BOOK 3y book
  • INJ 2 inj
  • SIZE ~81 FTE

Nearest TCR peer: Harris Las Vegas, LLC (0.0 TCR gap)

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

Knott Mechanical Inc. in the TCR neighbourhood

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

TCR

What this shows Knott Mechanical Inc. averages 0.8 TCR (30% of the Air system balancing and testing BLS benchmark).

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

Knott Mechanical Inc. TCR series: 2022=2.5 · 2023=0 · 2024=0 · BLS 2.8

Where Knott Mechanical Inc. falls in its industry

5,793 Air system balancing and testi establishments

Safer than 90% of graded establishments in this industry, whose median TCR is 3.3.

More dangerous than peersSafer than peers

Narrower to Maryland alone (the establishments it most directly competes with for workers and contracts): ranked #15 safest of 121 Air system balancing and testi employers in Maryland.

Knott Mechanical Inc. (81 employees, TCR 0.8) 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 Knott Mechanical Inc.
Knott Mechanical Inc. (81 employees, TCR 0.8) among 29 same-industry peers, split at the industry median of 60 employees and a TCR of 3.3

Knott Mechanical Inc. has more employees than the Air system balancing and testing 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 Illnesses Fatalities
2024 0.0 0.0 0 0 0
2023 0.0 0.0 0 0 0
2022 2.5 2.5 2 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

238220 · MD · Lutherville Timonium

5,793 Air system balancing and testing employers nationwide with a credible TCR · 7,213 rated employers in Maryland with headcount on file · 6 employers in Lutherville Timonium, MD · 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 Harris Las Vegas, LLC 0.8 TCR
NAICS-TCR ATX Corporate 0.8 TCR
NAICS-TCR United Systems Mechanical, LLC 0.8 TCR
NAICS-TCR Straus Systems, Inc. 0.8 TCR
STATE-SIZE SERVPRO of Howard County 81 FTE
STATE-SIZE Berlin Steel - DC Office 81 FTE
STATE-SIZE 629 81 FTE
STATE-SIZE Intellimar, Inc 81 FTE
CITY-NEAR 235584-LUTHRVLLE TIMONIUM PO 91 FTE
CITY-NEAR Kaiser MidAtlantic Non-Union 79 FTE
CITY-NEAR LUTHERVILLE TIMONIUM_1371192 76 FTE
CITY-NEAR 4186-04608 24 FTE
NAT-TCR 8027 - 1-Main 0.8 TCR
NAT-TCR Mcc - Nj 0.8 TCR
NAT-TCR Startek - Myrtle Beach, SC 0.8 TCR
NAT-TCR BVMP 0.8 TCR
NAT-SIZE DoubleTree by Hilton Denver Aurora 81 FTE
NAT-SIZE Fs-Ascension Resurre 81 FTE
NAT-SIZE Fs-Presence St Mary 81 FTE
NAT-SIZE White Castle Distributing -Covington 81 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. 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.