Materials

What a permanent room is made of

Three materials decide whether a home gym still looks and works the same years from now: the steel, the finish on it, and the floor under it.

Steel

Gauge is the number that matters. The lower it is, the thicker the wall. Doer builds the TOTUM and the Black Series line in 11-gauge steel, 3 mm thick. Thickness is what resists flex under load and fatigue over time.

A Black Series plate-loaded machine in matte black, photographed in a white studio with arches — Black Series, plate-loaded. Matte black powder coat.

Finish

Black Series is Doer's premium line of strength and cardio equipment. Its matte black powder coat is chosen for humid climates, where ordinary paint gives way first. The line comes in three families: Plate-Loaded, Stack Elite and Cardio Premium.

Doer states the line is built for more than seven years of continuous heavy use in commercial settings. A home asks far less of it.

03 · Floor

Black rubber floor tiles with blue flecks, including a rounded corner piece — Tiles with edge and corner pieces.

A black connector with pegs joining the underside of a rubber tile — Interlocking connection, no adhesive.

A hand pressing a rubber tile into place next to a rounded edge piece — Laid by hand over a level surface.

Under a rack, the reference is a 20 mm high-density rubber tile with an interlocking system. It absorbs the impact that would otherwise reach the slab, and because it uses no glue it can be lifted and moved if the room changes. For cardio, mobility and fixed machines, an 8 mm rubber roll gives a continuous surface. Foam and vinyl do not absorb impact and do not belong under free weights.

Read the flooring note

Permanence, in figures

Steel
11gauge
Steel 3 mm thick in the frames of the TOTUM and the Black Series line.
Mass
600kg
Approximate mass of the TOTUM Power Rack, according to Doer Fitness.
Service
7+years
Of continuous heavy commercial use: what Doer Fitness states the Black Series line is built for.

Up close

Surfaces, edges, fixings

Macro view of the textured black surface and rounded edge of a bench pad — The textured edge of a bench pad.

A black speckled rubber plate on a steel bar in front of a perforated rack upright — Rubber plate against perforated steel.

Close view of a black pulley housing with a steel carabiner and strap on a rack upright — Pulley housing and carabiner.

A knurled steel handle bolted between two black plates — Knurled steel where the hand meets the machine.

Two Doer Fitness barbells with chromed sleeves against a black background — The parts you touch every day deserve the same standard as the frame.

Close view of a black bumper plate with red lettering resting on speckled rubber flooring — Plate on rubber: the two surfaces that meet thousands of times.

The studio

Every room starts with a conversation about the room.

Bring the measurements, the ceiling height and what you want to train. The Doer Fitness team turns them into a layout before a single piece of equipment is chosen.

Request a private consultation