Manufacturing building construction · Ohio

Mammoth Prefab LLC

Columbus, OH · ~21 workers · 3 years of OSHA Injury Tracking Application data.

A
Excellent Safety Record
1.2
Avg TCR
2.9
Industry avg
0
Fatalities
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The verdict

Mammoth Prefab LLC runs at 42% of its industry's injury rate - far safer than the typical Manufacturing building construction workplace, earning a grade A.

Mammoth Prefab LLC: 1.2 TCR = 42% of Manufacturing building construction BLS 2.9 · 3y Form 300A (see methodology below)

Mammoth Prefab LLC safety composite

Mammoth Prefab LLC scores strongest on dart rate (safer than 73% 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).

C

62/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
C 1.21 per 100 workers

Safer than 60% of industry peers

DART rate
C 0 per 100 workers

Safer than 73% 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

−3.6

2021→2023

Mammoth Prefab LLC injury rate improved

Mammoth Prefab LLC's TCR fell 3.6 from 3.6 in 2021 to 0.0 in 2023. Peak filing year was 2021 at 3.6 TCR. In 2023, DART was 0× this establishment's average TCR (severity share of cases).

2021=3.6 · 2022=0.0 · 2023=0.0

OSHA ITA Form 300A scorecard

Establishment book 236210 · Columbus, OH AT/BELOW-IND · SMALL

Grade A · TCR 1.2 · 42% of ind

  • DART 0.0 DART
  • RANK #21/50
  • PHOTO Albu & Associates, I…
  • BOOK 3y book
  • INJ 1 inj
  • SIZE ~21 FTE

Nearest TCR peer: Albu & Associates, Inc. (0.0 TCR gap)

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

Mammoth Prefab LLC in the TCR neighbourhood

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

TCR

What this shows Mammoth Prefab LLC averages 1.2 TCR (42% of the Manufacturing building construction BLS benchmark).

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

Mammoth Prefab LLC TCR series: 2021=3.6 · 2022=0 · 2023=0 · BLS 2.9

Where Mammoth Prefab LLC falls in its industry

924 Manufacturing building constru establishments

Safer than 60% of graded establishments in this industry, whose median TCR is 1.6.

More dangerous than peersSafer than peers

Narrower to Ohio alone (the establishments it most directly competes with for workers and contracts): ranked #21 safest of 50 Manufacturing building constru employers in Ohio.

Mammoth Prefab LLC (21 employees, TCR 1.2) among 29 same-industry peers, split at the industry median of 71 employees and a TCR of 1.6 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 05001,0001,500 05101520 Average employees Total Case Rate Mammoth Prefab LLC
Mammoth Prefab LLC (21 employees, TCR 1.2) among 29 same-industry peers, split at the industry median of 71 employees and a TCR of 1.6

Mammoth Prefab LLC has fewer employees than the Manufacturing building construction median and a lower injury rate than the industry's median TCR of 1.6. 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
2023 0.0 0.0 0 0 0
2022 0.0 0.0 0 0 0
2021 3.6 3.6 1 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

236210 · OH · Columbus

924 Manufacturing building construction employers nationwide with a credible TCR · 22,650 rated employers in Ohio with headcount on file · 1,500 employers in Columbus, OH · 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 Albu & Associates, Inc. 1.2 TCR
NAICS-TCR Puerto Rico All Sites 1.2 TCR
NAICS-TCR Rudolph and Sletten Mani Office (HQ) 1.2 TCR
NAICS-TCR Apicore US LLC 1.2 TCR
STATE-SIZE Grand Republic 21 FTE
STATE-SIZE Hog and Maintenance 21 FTE
STATE-SIZE Case Farms Hatchery 21 FTE
STATE-SIZE Case Farms winesburg hatchery 21 FTE
CITY-NEAR Nationwide Children's Hospital 13,367 FTE
CITY-NEAR Nationwide Children's Hospital Main Campus 10,116 FTE
CITY-NEAR Riverside Methodist Hospital 9,759 FTE
CITY-NEAR North America Fulfillment Centers (FCs) : CMH1 5,057 FTE
NAT-TCR Market Basket #10 1.2 TCR
NAT-TCR Weststar Property Management 1.2 TCR
NAT-TCR Armstrong Garden Centers Corporate Office 1.2 TCR
NAT-TCR Humboldt Utilities 1.2 TCR
NAT-SIZE Quality Relocation Services 21 FTE
NAT-SIZE Mct, Inc. 21 FTE
NAT-SIZE UAR- Atlanta 21 FTE
NAT-SIZE Puerto Rico Distribution Center 21 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: 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.