School building construction · California

Construct 1 One, Corp

Tustin, CA · ~20 workers · 2 years of OSHA Injury Tracking Application data.

F
Failing Safety Record
6.1
Avg TCR
2.9
Industry avg
0
Fatalities
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The verdict

Construct 1 One, Corp runs at 211% of its industry's injury rate - far more dangerous than the typical School building construction workplace, earning a grade F.

Construct 1 One, Corp: 6.1 TCR = 211% of School building construction BLS 2.9 · 2y Form 300A (see methodology below)

Construct 1 One, Corp safety composite

Construct 1 One, Corp scores strongest on dart rate (safer than 73% of same-industry peers) and weakest on total case rate (tcr) (safer than 16%), 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

45/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
F 6.11 per 100 workers

Safer than 16% 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

−2.6

2018→2020

Construct 1 One, Corp injury rate improved

Construct 1 One, Corp's TCR fell 2.6 from 7.4 in 2018 to 4.8 in 2020. Peak filing year was 2018 at 7.4 TCR. In 2020, DART was 0× this establishment's average TCR (severity share of cases).

2018=7.4 · 2020=4.8

OSHA ITA Form 300A scorecard

Establishment book 236220 · Tustin, CA ABOVE-IND · SMALL

Grade F · TCR 6.1 · 211% of ind

  • DART 0.0 DART
  • RANK #407/486
  • PHOTO King Construction Co…
  • BOOK 2y book
  • INJ 3 inj
  • SIZE ~20 FTE

Nearest TCR peer: King Construction Company LLC (0.0 TCR gap)

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

Construct 1 One, Corp in the TCR neighbourhood

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

TCR

What this shows Construct 1 One, Corp averages 6.1 TCR (211% of the School building construction BLS benchmark).

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

Construct 1 One, Corp TCR series: 2018=7.4 · 2020=4.8 · BLS 2.9

Where Construct 1 One, Corp falls in its industry

4,692 School building construction establishments

Safer than 16% of graded establishments in this industry, whose median TCR is 2.3.

More dangerous than peersSafer than peers

Narrower to California alone (the establishments it most directly competes with for workers and contracts): ranked #407 safest of 486 School building construction employers in California.

Construct 1 One, Corp (20 employees, TCR 6.1) among 29 same-industry peers, split at the industry median of 55 employees and a TCR of 2.3 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 0100200300400500 02468 Average employees Total Case Rate Construct 1 One, Corp
Construct 1 One, Corp (20 employees, TCR 6.1) among 29 same-industry peers, split at the industry median of 55 employees and a TCR of 2.3

Construct 1 One, Corp has fewer employees than the School building construction median and a higher injury rate than the industry's median TCR of 2.3. 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
2020 4.8 0.0 1 0 0
2018 7.4 7.4 2 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

236220 · CA · Tustin

4,692 School building construction employers nationwide with a credible TCR · 51,834 rated employers in California with headcount on file · 94 employers in Tustin, CA · 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 King Construction Company LLC 6.1 TCR
NAICS-TCR DSISD New WSES & DSMS Reno 6.1 TCR
NAICS-TCR Elder Construction, Inc - Colorado Springs 6.1 TCR
NAICS-TCR PHC Restoration Inc 6.1 TCR
STATE-SIZE Sills Farms, Inc. 20 FTE
STATE-SIZE F A Maggiore & Sons, LLC 20 FTE
STATE-SIZE CALMEX CONTRACTING INC 20 FTE
STATE-SIZE Velvet Antler Ranch LLC 20 FTE
CITY-NEAR TUSTCA70 1,036 FTE
CITY-NEAR TUSTCA70 - Pacific Bell Telephone Company 840 FTE
CITY-NEAR 738 YOUNG S MARKET-TUSTIN 765 FTE
CITY-NEAR Headquarters, CA 691 FTE
NAT-TCR Poet Biorefining- Chancellor 6.1 TCR
NAT-TCR Feeding South Dakota - Sioux Falls 6.1 TCR
NAT-TCR Bodycote Thermal Processing Inc - Canton Ronda 6.1 TCR
NAT-TCR Store 0231 6.1 TCR
NAT-SIZE HDBA Midwest City (BSRO) 20 FTE
NAT-SIZE EJC - Physicians 20 FTE
NAT-SIZE Gentle Harvest 20 FTE
NAT-SIZE Miami 20 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: 2020, 2018. 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.