One canonical datum
Before any drawing exists, the project becomes a closed set of dimensions: axes, levels, envelope, every room with coordinates. That datum is audited until it adds up exactly — no dimension chain is allowed to stay open.
Engineering projects
The whole project,
The whole project,
in a browser.
OITO designs and publishes the complete project — dimensioned plans and sections, a 3D tour, structural calculations, hydraulics, electrical, infrastructure and specifications — as one address the client, the engineer and the site foreman all open on a phone.
Dimension chains that close
A 3D tour with no plugin
Calculations shown in full
Method
A project that cannot contradict itself
The classic failure in design work is not ugly drawing — it is the plan saying one thing, the section another and the calculation report a third. That is precisely what OITO attacks.
Every discipline on the same geometry
Structure, hydraulics, electrical, thermal and infrastructure are all resolved on top of that datum. Move a column and everyone knows. Coordination stops being a meeting and becomes a check that runs by itself.
Adversarial audit
Before publication the project goes to reviewers whose job is to fail it: re-integrate volumes, redo dimension chains, hunt for the wall with zero thickness. What they find becomes a correction, and then becomes an automated test.
What we deliver
Eight pieces, one project
Every OITO project ships with these eight fronts resolved and published.
Dimensioned plans and sections
Floor plan, roof plan, longitudinal and cross sections and elevation — vector drawings, legible on any screen, with the dimensions checked by code.
3D tour in the browser
The whole space in 3D, with first-person walking and orbit. Nothing to install, no sign-in, no heavy file.
Structural report
Loads, earth pressure, verification of slabs, walls and beams, with the working shown and the standards cited — not just the answer.
Hydraulic design
Cold and hot water, circulation, filtration, heating and drainage, with pipe sizing and head loss worked out.
Electrical design
Panel, circuits, residual-current protection, earthing and bonding, respecting the safety zones around water.
Infrastructure
Water and power supply, storage, septic treatment and final disposal — the part that is usually left out and then stops the build.
Thermal performance
Loss balance, heating sizing, condensation control and dehumidification — so the space works in winter as well as in summer.
Specification schedule
Materials, finishes, equipment and acceptance criteria, written so that three suppliers can price the same thing.
Projects
See one project end to end
Not a portfolio of images. The actual project, open, with the numbers on show.
Who it is for
Three people, one address
The person building
The owner understands what they are buying before the first machine climbs the slope: they walk the space in 3D, see where the windows land, what heating costs and exactly what was specified.
The people executing
Foreman and contractor open the plan on a phone, in the mud, with the right dimension and the detail for that stretch. No torn sheet, no stale version circulating by message.
The people checking
Engineers, structural consultants and reviewers audit the open calculations, verify the assumptions and argue about the number instead of the impression.
Questions
Frequently asked
Does this replace a signed construction issue?
No. What OITO publishes is the developed design with its calculations open, at the level needed to decide, price and build. Formal professional liability — the Brazilian ART/RRT, municipal approval and environmental licensing — stays with the qualified professional who takes on the work, and the documentation is prepared precisely so that they can review it and take it on with confidence.
Why publish a website instead of sending a PDF?
Because a PDF ages in a downloads folder. An address has exactly one version, the current one, and it reaches everyone the same. Besides, a 3D tour, a table that recalculates and a drawing you can zoom into do not fit on a sheet of paper.
Does the 3D tour need an app or a headset?
No. It runs in a phone or desktop browser, with a finger or a mouse. A VR headset gives a better experience, but none of it is required.
Are the calculations trustworthy?
They are published precisely so they can be checked. Every report shows the assumptions made, the standard applied, the formula, the numbers that went in and the result. Where an assumption is unconfirmed — soil investigation, supply voltage, the site’s minimum temperature — that is written down, not hidden. And no number is published without passing an adversarial audit: the first version of Project 01 was failed by three independent reviewers, and the corrections that could become automated tests did.
Can I adapt a published project to my own site?
A published project is the answer to one specific piece of ground: platform size, level change, orientation, climate and use. It works as a starting point and as a quality reference, but every site starts again from survey and its own datum.
Who is behind OITO?
OITO is built and maintained by Custodis, a technology and engineering firm operating since 2007. Same house that maintains other technical products, and the same engineering discipline applied to architecture.
Contact
Got a piece of land and an idea?
Send the dimensions, a photo and what you want to happen there. The conversation starts from what the ground allows.
contato@custodis.com.br