Wood design software for US structural engineers. Model the building, check every member and shear wall, and get the structural set from the same model, with nothing redrawn in CAD.
Built by a structural engineer for structural engineers. Every sheet carries your name, your stamp and a PRELIMINARY mark until you issue it.
Nothing invented
Missing values are never guessed. They show up on the sheet as stated assumptions or review notes.
Open items stay visible
Anything that fails goes to an Unresolved Design Items list, so nothing slips into the set quietly.
You issue the set
Sheets read PRELIMINARY or NOT FOR ISSUE until you, the engineer of record, seal them.
Most offices check a building in one program and redraw it in CAD, then check the drawing again. AREZ keeps both in one model, so a change to a beam updates the calc and the sheet together.
Watch it happen in the real app: one header widens, the design re-runs, the schedule is already current. Then drag the span in the illustration below. Nothing is redrawn.
| Mark | Span | Member | Bearing | Jack studs |
|---|---|---|---|---|
| H1 | 3 ft 0 in | (2) 2x6 DF No.2 | 1.5 in | 1 |
| H2 | 6 ft 0 in | (2) 2x10 DF No.2 | 1.5 in | 1 |
| H3 | 4 ft 0 in | (2) 2x8 DF No.2 | 1.5 in | 1 |
Illustration with example sizes, not a design check. In AREZ the member comes from the NDS check for the actual loads.
Spend the week on the engineering, not on drawing it twice.
General notes, framing plans, sections, details and schedules, numbered in the S-series you already use. Click any sheet to read it at full size.
All the sheets above as one PDF, plus the AREZ model file that produced them. Open it in the trial and change anything.
Download the PDF now (PDF, 15 sheets, 4 MB), or leave an email and get the model file with it.
The sample house, designed and drawn twice: once the usual way, once in AREZ.
Timed by the author on the sample set. Your times depend on the building and your office standards.
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Every element and the standard it is checked against. Where AREZ stops, it says so on the sheet.
| Element | Design basis | AREZ does |
|---|---|---|
| Joists, beams, headers, posts, stud walls | NDS 2024 | Designs |
| Shear walls and diaphragms | SDPWS 2021 | Designs |
| Wind and seismic loads, load combinations | ASCE 7-22 | Calculates |
| Holdowns, straps, hangers, post bases, hurricane ties | Simpson Strong-Tie C-C-2026 | Selects |
| Sill anchor bolts | NDS yield equations · ACI 318-19 | Designs |
| Trusses | Manufacturer | Preliminary sizing only |
| Foundations | Foundation engineer | Reports loads only |
Every project carries a NOT VERIFIED flag until you sign off on the code and product data it uses.
Ask about a failing member, have a sheet reviewed, or describe a change. Mijo proposes it, and nothing changes until you press Apply.
A local model through Ollama. Nothing about your project is sent online.
It cites the code sections and product data you have loaded, not the internet.
Ask for a masonry wall and it tells you that is outside AREZ.
Why is beam B-204 failing?
5¼×11⅞ PSL 2.2E passes at 0.71 with the same bearing.
No account, and no project data leaves your machine. Backups are a single file you keep.
I am a structural engineer with years of practice in steel, wood and concrete design, on projects across the United States, Africa and Asia. AREZ started as the tool I wanted on my own jobs: one model for the calc and the drawings, and honest about what it does not design.
Majid Yassine, BS, MS · Founder, AREZ · Registered structural engineer, Order of Engineers and Architects, Lebanon
Everything in AREZ, for one engineer. The founding price covers the first 100 seats. Lock it in and it never goes up while you stay subscribed, yearly or monthly. Cancel any time from your account, and any first purchase is refundable in full within 14 days.
New seats after the founding offer: $1,290 a year
No card needed for the trial. Trial sheets are stamped PRELIMINARY.
Five or more engineers, shared seats, or invoiced billing. Same software, one bill.
Anything else: hello@tryarez.com
Licensed structural engineers in the US who design light wood frame buildings: houses, multifamily and small commercial.
No. AREZ is a design aid. You review the design, you seal the drawings, and the sheets say PRELIMINARY until you do.
No. AREZ reports the loads at every bearing point for the foundation engineer.
NDS 2024, SDPWS 2021, ASCE 7-22 and Simpson Strong-Tie catalog C-C-2026. Updates are included in your plan.
Stripe emails your receipt and a download link. Install it and open your first project. No account needed.
Yes. Each engineer needs a seat. For five or more seats, email us for volume pricing.
Not yet. Leave your email with the sample set and we will tell you when it does.
No. AREZ uses their published catalog data and is not affiliated with or endorsed by them.
