What Is a Job Safety Analysis? How GCs Run JSAs That Actually Work
You can’t control the weather, a sub’s turnover, or a delivery that shows up two hours late.
You can control whether the crew walks through the task before they start it.
So, what is a job safety analysis? A job safety analysis (JSA) is a written review that breaks a task into steps, identifies the hazards in each step, and assigns a specific control to each hazard before work starts. On a GC’s jobsite, the value isn’t the form. It’s the conversation between the crew doing the work and the person running the site.
Why JSAs matter more on a general contractor’s jobsite
Construction is still the most dangerous private industry for fatal injuries. The Bureau of Labor Statistics counted 1,034 construction worker deaths in 2024, the most of any private industry sector, even though that was 3.8% fewer than the year before. Falls, slips, and trips caused 389 of those deaths, roughly 38% of the total. Falls show up in citations too: fall protection general requirements topped OSHA’s list of most-cited standards in fiscal year 2025 for the 15th year in a row. Fatal work injuries declined in 2024 : The Economics Daily : U.S. Bureau of Labor Statistics +2
Here’s the part that’s specific to GCs. Under OSHA’s multi-employer citation policy, more than one employer can be cited for the same hazard on a multi-employer worksite, depending on whether they created it, exposed workers to it, were responsible for correcting it, or controlled the site. As the GC, you’re usually the controlling employer. Your subs’ JSAs are your problem too. osha
JSA vs. JHA: is there a difference?
No. A job safety analysis and a job hazard analysis (JHA) are the same process. OSHA uses “job hazard analysis” in its own publications, and its Job Hazard Analysis guide (OSHA 3071) is the standard reference. You’ll also hear “task hazard analysis.” On some federal work, the contract calls it an activity hazard analysis (AHA). Many GCs also run a shorter daily pre-task plan with each crew, built from the JSA. jsabuilder
Does OSHA require a JSA? OSHA doesn’t have a standard that requires a document called a JSA on every construction task. But OSHA’s construction training standard does require employers to instruct each worker in recognizing and avoiding unsafe conditions, and many clients, contracts, and insurers require written JSAs. A JSA is the most practical way to show you did that work before the task started. field1st
How to perform a job safety analysis in construction
- Pick a specific task.
Analyze “setting roof trusses with a crane,” not “framing.” Start with high-risk work, tasks new to the crew, and anything with a history of incidents or near misses. - Break it into steps.
List what’s being done, in order, in plain language. Most tasks land at five to ten steps. If you’re past ten, split it into two JSAs. - Identify the hazards in each step.
Think falls, struck-by, caught-between, electrical, equipment, and conditions like heat, wind, or mud. Ask the crew doing the work. They’ll see things the office won’t. - Assign a control to every hazard.
Work down the hierarchy of controls: eliminate the hazard, substitute something safer, use engineering controls, then administrative controls, with PPE as the last line of defense. Be specific. “Guardrails on the east slab edge” is a control. “Be careful near edges” isn’t. risk-strategies - Review it with the crew on site.
Go through it at the start of the shift, where the work happens, and get signatures from everyone involved. - Update it when conditions change.
New weather, a new trade working nearby, different equipment, or a near miss means the JSA gets revised before work continues.
Job safety analysis example: setting roof trusses
| Job step | Hazards | Controls |
|---|---|---|
| Stage trusses and rigging | Shifting bundles; overhead power lines | Level laydown area; verify line clearance before crane setup |
| Lift and swing trusses | Struck-by from suspended load | Qualified rigger and signal person; tag lines; no one under the load |
| Land and set trusses on walls | Falls from top plate; truss rollover | Personal fall arrest tied to engineered anchors; temporary bracing per manufacturer’s installation guide |
| Install permanent bracing and sheathing | Falls from height; ladder misuse | Guardrails or fall arrest; ladders secured and extended 3 feet above the landing |
Every hazard has a control, and every control is something a super could walk up and check.
Where JSAs break down on the jobsite
Copy-and-paste JSAs
A sub hands over the same JSA they used on their last three jobs. It lists the task, but not this site’s power lines, soil, or neighboring trades.
JSAs that live in a binder
The form got signed at 6:45 a.m. and never came out again. If the crew can’t tell you what’s on it, it didn’t do its job.
JSAs disconnected from the schedule
When the schedule shifts, high-risk work can start before anyone has done a JSA for it. Bulletproof construction scheduling and safety planning should use the same lookahead.
Changes that never get documented
Wind picks up, the crane gets moved, or another trade shows up below. If that doesn’t make it into the JSA and the daily log, you have no record that anyone adjusted the plan. Jobsite weather tracking is part of that record.
5 JSA best practices for general contractors
- Put JSAs in the subcontract.
Require task-specific JSAs before mobilization, not just a company safety manual, and review them before the sub starts work. - Tie JSAs to the three-week lookahead.
When a high-risk task shows up on the schedule, the JSA is due. Clear handoffs between the office and the field make this work. Here’s how to improve communication between project managers and superintendents. - Review them in the field, with the crew doing the work.
The foreman who wrote it should walk it with the people using it, at the start of the shift. - Back them up with daily logs and photos.
Photos of guardrails, anchors, and exclusion zones show the controls were in place. Construction photo documentation protects your crew and your company. - Keep JSAs where the field and office can both see them.
Paper forms in the trailer get lost. Jobsite management software keeps safety records with the rest of the project, and field reporting makes them easy to capture on a phone.
Make construction safety management part of how you run the job
The GCs with the best construction site safety records don’t treat JSAs as a separate safety program. They’re part of how the job gets managed, alongside the schedule, daily logs, and the conversation with every sub before work starts. Effective construction project management and safety planning are the same discipline.
RedTeam is construction project management software that keeps daily logs, jobsite photos, schedules, and project documents in one connected platform, so the field and the office work from the same information. Born on the jobsite, RedTeam has spent over 20 years helping small to mid-sized GCs simplify, automate, and standardize their work from precon through closeout. Unlike enterprise construction software, every RedTeam customer gets full software functionality and a dedicated implementation and customer success team.
That’s total project control. That’s RedTeam.
See how your team can keep every jobsite under control
Give your supers and PMs one place to document the work, the conditions, and the plan.
