Seetin Design
CNC plasma cutting a plate, sparks across the table, steel racks behind
Our process

Cut. Bend. Weld. Set.

Design, modeling, detailing, engineering, fabrication, finish and install, in one house. No hand-offs between companies, so nothing gets lost between the drawing and the building.

On the floor

Sketch to steel in six moves

The shop →
  1. Sawtooth stringers laid out with their shop drawings
    01

    Draw

    Every job is modeled in SolidWorks and detailed in SDS/2 before steel moves. The drawings go to the floor with the steel.

  2. CNC plasma cutting stair stringer plates, sparks flying
    02

    Cut

    Stringers, plates, clips and pans come off our CNC plasma table, cut from plate up to an inch thick.

  3. A perforated steel pan held at the press brake
    03

    Bend

    Pans, angles and curved stringers are formed on our CNC press brake. Rings and rails go through the section roller and tube bender.

  4. Welding a long sawtooth stringer down the length of the shop
    04

    Weld

    MIG, TIG and stick, on fixture tables that hold the work true while it is welded. Stainless is TIG-welded on pure argon.

  5. A finished brass angle on the fixture table
    05

    Finish

    Grinding, brushing, polishing, blackening and paint, done here so the finish is ours too.

  6. Finished floating stair with wood treads and a glass guard
    06

    Set

    Our own crew sets the work. The people who built it are the people who bolt it to the building.

Bump-forming

The curve is made on our floor

A helical stringer starts as flat plate. We bump it on the press brake, a shallow hit, move the plate, another hit, hundreds of times, until it takes the radius the model asks for. How we build stairs →

Step by step

How a job runs

  1. 01

    The idea

    We start where the architect's sketch ends. Bob trained at Parsons and still draws every job before it is cut. We read the set, ask the questions, and come back with a number and a way to build it.

  2. 02

    The model

    Every piece is modeled in SolidWorks: plates, bends, welds, hardware. The model is the job. It tells us the weight, the flat patterns and what fights the tooling before any steel moves.

  3. 03

    The drawings

    Shop drawings come out of SDS/2 in a standard detailing set: piece views, assemblies, erection drawings and weld callouts on 24 x 36 sheets. Architects get drawings they can check, and the shop gets drawings it can build.

  4. 04

    The engineering

    When a stair or a platform needs calculations, our professional engineer reviews and stamps them. Delegated design stays in the same house as the drawings.

  5. 05

    Cut

    CNC plasma cuts plate up to an inch thick. The ironworker punches and shears, and the saws handle tube and bar.

  6. 06

    Form

    Curved stringers are bump-formed on the press brake, one hit at a time, until the plate takes the radius. The section roller and tube bender handle rings, rails and arcs.

  7. 07

    Weld and fit

    MIG, TIG and stick, on modular fixture tables that hold a stair true while it is welded. Stainless is TIG-welded on pure argon.

  8. 08

    Finish

    Grinding, mirror polishing, brushing, blackening and powder coat, done in the shop so the finish is ours too.

  9. 09

    Install

    Our own crew sets the work. The people who built the stair are the people who bolt it to the building.

In the shop

Work in progress

Plasma table cutting in the high bay
MIG on the fixture table
A sawtooth stringer laid out on the floor
Winder pans with mesh risers, stacked for a fit check
Welding a frame under the crane
Matched bent tubes, tagged and laid out
Milling a pocket in steel plate
Clamping a gusset for fit-up
Formed sheet parts at the press brake
Bumping a curved plate
Grinding a frame on the table
JACX steel fins by the press brake
Philosophy

Give more than we take

For thirty years the way we win work has been the same: beautiful shop drawings and a detailed bid before we take any money. We educate the client about their own project. They walk away with a real price and real drawings whether or not they hire us.

Open steel stair with glass guard
Built for