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Trade terms for professionals and design studios
The GS certificate for mr.24 reads like a job description: office work chair, control room use, for a user weight up to 441 lb (200 kg), 24 hours a day, 7 days a week. TÜV Rheinland ran the safety tests to DIN 4573, the German standard for chairs in continuous use, and states that they were carried out with higher load cycles than an ordinary office chair sees. The certificate is valid through September 27, 2028, and a second one, for harmful substances, runs to October 2030.
What that buys a dispatch center or a security desk is a chair that can be handed from one shift to the next without a checklist. Among task and ergonomic chairs mr.24 is the one whose numbers were set by the test bench: a Similar mechanism opening to about 32° with tension set by hand crank, a Schukra lumbar support moving 2¾ in up and 1⅝ in out, a 2 in quilted seat pad, edges wrapped in polyurethane, and pads that swap out when the fabric gives up before the frame does.
Who sits where decides the version. Operators upright at a console take the plain chair; anyone who leans back to watch a wall of screens takes the tilting vinyl neck support; where the chair doubles as a supervisor seat the leather comfort cushion goes on; and desks with keyboard trays get the armless build. The floor and the body decide the rest: soft casters on hard floors, the 1⅜ in deeper seat for larger builds, a polished base, fabric or leather. For an operations floor laid out as an open plan workspace, the rating on the certificate is the number that matters. La Mercanti puts those pounds on the chair label and on the order.
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With a hand crank on the Similar mechanism. Sedus gives the range as 550 to 1500 N, roughly 124 to 337 lbf, and prints the conversion 10 N = 1 kg on its own sheet. Pull the knob out, turn it clockwise for more resistance, push it back in; a lighter colleague on the next shift turns it the other way.
Not as standard. It uses the Sedo-Lift, a hydraulic rack-and-pinion unit with a 16½ to 20½ in range that Sedus describes as nearly wear-free, with no cylinder to fail or replace, and covers with a 30-year guarantee. A gas cylinder with a 15⅜ to 20½ in range is available as an alternative.
Scala leather in fourteen colors, or three fabrics: Phoenix polyester with three colors on the list and twenty-one in the wider range, Pure recycled polyamide in four colors, and Umber in New Zealand wool. The backrest can be ordered in a different cover from the seat.
The seat pad and the back pad are both listed as replaceable, and the covers are not glued to the foam. Casters pull out by hand and swap between the hard and soft types. Sedus asks that pads and the height column be handled by specialist staff, which La Mercanti arranges through the dealer channel.
Between 25⅝ and 30¾ in (650-780 mm), because each armrest slides 2 in inward or outward without tools and a further ⅝ in per side with a TX40 key. The seat itself is 18⅞ in wide. Overall height is 29⅛ to 37 in, or up to 39⅜ in with a neck support.
A chair that changes user three times a day has to be reset three times a day. Five steps from the Sedus manual, in the order they matter on mr.24.
Push back until the seat of mr.24 is fully occupied; only then does the backrest make contact and support. Slide the seat with the lever underneath if your thighs end short of the front edge or hang over it.
Lift the lever with your weight on the seat to lower mr.24, or with the seat unloaded to raise it. Stop when the forearm rests flat on the desk with the elbow at about 90° and the feet flat with the knee at about 90°.
With the backrest unloaded, turn the height knob until the curve of mr.24 meets the third and fourth lumbar vertebrae, then use the second knob to push the curve forward or ease it back.
Pull the crank out and turn it clockwise for more resistance, counterclockwise for less, then push it back in. Sedus recommends leaving mr.24 unlocked so the back follows you instead of holding one position.
Armrest height, depth and width are the last adjustments and the first the next user changes. La Mercanti suggests a card at each mr.24 station listing the settings each shift prefers.
