Mineral Wool Manufacturing · North Carolina

Main

Huntersville, NC · ~30 workers · 2 years of OSHA Injury Tracking Application data.

F
Failing Safety Record
9.3
Avg TCR
3.3
Industry avg
0
Fatalities
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The verdict

Main runs at 282% of its industry's injury rate - far more dangerous than the typical Mineral Wool Manufacturing workplace, earning a grade F.

Main: 9.3 TCR = 282% of Mineral Wool Manufacturing BLS 3.3 · 2y Form 300A (see methodology below)

Main safety composite

Main scores strongest on dart rate (safer than 82% of same-industry peers) and weakest on total case rate (tcr) (safer than 1%), 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

42/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
F 9.3 per 100 workers

Safer than 1% of industry peers

DART rate
B 0 per 100 workers

Safer than 82% of industry peers

Fatalities
D 0

Safer than 50% 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

−7.2

2017→2018

Main injury rate improved

Main's TCR fell 7.2 from 12.9 in 2017 to 5.7 in 2018. Peak filing year was 2017 at 12.9 TCR. In 2018, DART was 0× this establishment's average TCR (severity share of cases).

2017=12.9 · 2018=5.7

OSHA ITA Form 300A scorecard

Establishment book 327993 · Huntersville, NC ABOVE-IND · SMALL

Grade F · TCR 9.3 · 282% of ind

  • DART 0.0 DART
  • RANK #5/5
  • PHOTO Plant 7 Insul-Courti…
  • BOOK 2y book
  • INJ 6 inj
  • SIZE ~30 FTE

Nearest TCR peer: Plant 7 Insul-Courtic Corp (0.3 TCR gap)

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

Main in the TCR neighbourhood

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

TCR

What this shows Main averages 9.3 TCR (282% of the Mineral Wool Manufacturing BLS benchmark).

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

Main TCR series: 2017=12.9 · 2018=5.7 · BLS 3.3

Where Main falls in its industry

101 Mineral Wool Manufacturing establishments

Safer than 1% of graded establishments in this industry, whose median TCR is 2.2.

More dangerous than peersSafer than peers

Narrower to North Carolina alone (the establishments it most directly competes with for workers and contracts): ranked #5 safest of 5 Mineral Wool Manufacturing employers in North Carolina.

Main (30 employees, TCR 9.3) among 29 same-industry peers, split at the industry median of 126 employees and a TCR of 2.2 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 0200400600800 0246810 Average employees Total Case Rate Main
Main (30 employees, TCR 9.3) among 29 same-industry peers, split at the industry median of 126 employees and a TCR of 2.2

Main has fewer employees than the Mineral Wool Manufacturing median and a higher injury rate than the industry's median TCR of 2.2. 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
2018 5.7 0.0 2 0 0
2017 12.9 12.9 4 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

327993 · NC · Huntersville

101 Mineral Wool Manufacturing employers nationwide with a credible TCR · 16,981 rated employers in North Carolina with headcount on file · 117 employers in Huntersville, NC · 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 Plant 7 Insul-Courtic Corp 9.6 TCR
NAICS-TCR Isolatek -Huntinton 8.7 TCR
NAICS-TCR Chowchilla 8.6 TCR
NAICS-TCR Harbison Walker International 7.5 TCR
STATE-SIZE Shugart Farm 30 FTE
STATE-SIZE Hays Hatchery 30 FTE
STATE-SIZE Hight Family Farms LLC 30 FTE
STATE-SIZE High Point Operations Center 30 FTE
CITY-NEAR McGuire Nuclear 1,045 FTE
CITY-NEAR Novant Health Huntersville Medical Center 1,002 FTE
CITY-NEAR Huntersville Field Support Center 929 FTE
CITY-NEAR Metrolina Greenhouses - Huntersville NC 725 FTE
NAT-TCR Air Technologies 66 9.3 TCR
NAT-TCR Salinas Center (Casal) 9.3 TCR
NAT-TCR San Marcos (Casmr) 9.3 TCR
NAT-TCR Allentown (Pabtn) 9.3 TCR
NAT-SIZE Liberty Residential - 40 Ridge Rd. 30 FTE
NAT-SIZE JX Peterbilt - Lansing 30 FTE
NAT-SIZE Highland Sheet Plant 30 FTE
NAT-SIZE MPS Printery 30 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: 2018, 2017. 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.