4u chairs

build & spec →
4u Model: 787-W-74C-53A20S-18WB-16HP-02UG | Fabric: ArcCom Rogue Fog (Seat).

finally, a chair 4u

4u Models: 780-B-74C-38A6-18BB-16HP-02U
4u Model: 780-B-74C-38A6-18BB-16HP-02U
4u Models: 780-B-74C-38A6-18BB-16HP-02U | Fabric: CF Stinson Staple Jet.
4u Model: 787-W-74C-53A20S-18WB-16HP-02UG | Fabric: ArcCom Rogue Fog (Seat).
4u Models: 785-W-74C-35A-18WB-16HP-LS4W-03UG
4u Models: 780-W-74C-35A-18WB-16HP-LS4W-02U | Fabric: Momentum Infinity Capri.
4u Model: 787-W-74C-53A20S-18WB-16HP-02UG | Fabric: ArcCom Rogue Fog (Seat).
4u Model: 787-W-74C-53A20S-18WB-16HP-02UG | Fabric: ArcCom Rogue Fog (Seat).

4u is a cutting edge Italian seating series designed by S.I. Design.  The flowing sleek lines of this chair add to the ambiance of sophistication in any environment while also providing incredible ergonomics, comfort, and functionality.  A range of back offerings in mesh, upholstered, or the newest, welded fabric “groove”, which is a sleek and comfortable hybrid of both mesh and fabric.  Both white and black frames are available with matching arms and bases.  There are extensive arm choices including custom 4u 6-way adjustable armrest—angle, width and height adjustments—and multiple body balance and synchro options enabling you to customize to your exact needs.  4u  offers two seat shape options: the euro slim line sit and the enhanced comfort sit. Also available as task stools.

There’s no doubt about it.  This chair is 4u.

  • Mesh backs: 4-way elastomeric stretch mesh in monochromatic solid colors or Via Seating’s exclusive biocidal, self-sanitizing copper striped mesh.
  • Upholstered backs: beautiful sleek upholstered back version with integrated, adjustable lumbar standards.
  • Groove backs: multiple colors of welded fabric provide an incredibly comfortable hybrid between mesh and upholstered back.
  • Seats: offering two distinct seat styles—original slim line design with seat pan and new enhanced comfort seat with extra height in the cushioning of the seat.
  • Via Seating’s comfort foam: a proprietary blend of high-density, injection-molded, closed-cell, cold-cured foam so durable and lasting it is backed by Via Seating’s 12 year warranty.
  • Control mechanisms: featuring quick adjust advanced synchro that uses single rotation adjustments for the back (no endless turning of the handle to adjust your backrest to your level of comfort) and body balance options.
  • Arms: multiple height and width adjustable options and a fixed, conference arm.
  • Bases: five-star bases available in black nylon, white nylon, polished aluminum & brushed aluminum to match the white frame finishes.
  • Max weight: 400 lb. (see options for more details)
  • Quick Ship: 20 chairs produced in a 48 hour period for mesh & groove backs. 15 chairs produced in a 48 hour period for upholstered backs.
  • Warranty: 12 year warranty including the foam, 5 years for mesh & groove.

 

  • ANSI/BIFMA X7.1-2011 (R2016) Standard Method equivalent to CDPH Standard Method v1.1-2010 (Clean Air Gold).
  • LEED – v4.1 Low Emitting Materials (Clean Air Gold).
  • Living Building Challenge (LBC) – Imperative 08 (Clean Air Gold).
  • WELL – Feature 04 – VOC Reduction (Clean Air Gold).

           

Upholstered back with a medium enhanced comfort seat. #772

Upholstered back with a large enhanced comfort seat. #773

Upholstered back with a medium slim line seat. #770

Upholstered back task stools.

  • Available on medium seats.

Groove back with a medium enhanced comfort seat. #787

Groove back with a large enhanced comfort seat. #788

Groove back with a medium slim line seat. #785

Groove back task stools.

  • Available on medium seats.

Mesh back with a medium enhanced comfort seat. #782

Mesh back with a large enhanced comfort seat. #783

Mesh back with a medium slim line seat. #780

Mesh back task stools.

  • Available on medium seats.

finishes

  • Frame finishes.

    Matte black. #B

    • Black finish is standard.
    • Finish applied to mesh frame.

    Matte white. #W

    • Finish applied to mesh frame.

meshes

  • Mesh colors.

    Standard black. #01U

    • Black mesh is standard for mesh back chairs.

    Graphite. #03U

    Stardust. #02U

  • Copper striped mesh colors. *new*

    Natural Copper striped. #13U

    Black copper striped. #14U

  • Groove colors.

    Standard black. #01UG

    Dark grey. #02UG

    Light grey. #03UG

    Taupe. #04UG

    Navy. #06UG

    Green. #07UG

    Red. #05UG

arms

  • Armless standard.

    Armless. #0A

    • Armless chairs are standard on all models.
  • Adjustable arms.

    4u black arm with forward tilt and 6 way adjustment. #33A

    user guide: view the guide →

    arm features:

    • Arm: moves up and down.

    permanent, adjustable armrests features:

    • Rotates in 15° and out 15°.
    • Slides forward 1.5″ and back to its resting position.

    4u white arm with forward tilt and 6 way adjustment. #35A

    user guide: view the guide →

    arm features:

    • Arm: moves up and down.

    permanent, adjustable armrests features:

    • Rotates in 15° and out 15°.
    • Slides forward 1.5″ and back to its resting position.

    Black arm with optional 8-way adjustments. #51A

    user guide: view the guide →

    arm features:

    • Arm: moves up and down.

    optional adjustable armrests features:

    • Rotates in 15° and out 15°.
    • Slides forward 1.5″ and back to its resting position.

    optional arm width adjustment features:

    • Bracket extends each arm up to 2.0″ away from the sides of the seat.

    White arm with optional 8-way adjustments. #52A

    user guide: view the guide →

    arm features:

    • Arm: moves up and down.

    optional adjustable armrests features:

    • Rotates in 15° and out 15°.
    • Slides forward 1.5″ and back to its resting position.

    optional arm width adjustment features:

    • Bracket extends each arm up to 2.0″ away from the sides of the seat.

    Polished arm with optional 8-way adjustments. #53A

    user guide: view the guide →

    arm features:

    • Arm: moves up and down.

    optional adjustable armrests features:

    • Rotates in 15° and out 15°.
    • Slides forward 1.5″ and back to its resting position.

    optional arm width adjustment features:

    • Bracket extends each arm up to 2.0″ away from the sides of the seat.

    Black roll back arm. #39A

    user guide: view the guide →

    arm features:

    • Moves up and down.
    • Smooth roll back feature where the arm can be fully rolled back out of the way to easily slide in and out of the chair.

    Black basic height adjustable arm. #38A

    user guide: view the guide →

    arm features:

    • Arm: moves up and down.

    optional arm width adjustment features:

    • Bracket extends each arm up to 2.0″ away from the sides of the seat.
  • Fixed arms.

    Black fixed conference arm with fixed cap. #46A

    • Permanent armrest is fixed.

control mechanisms

adjustable lumbars

  • Optional adjustable lumbar supports.

    Black adjustable lumbar. #LS4B

    user guide: view the guide (pdf)→

    adjustable lumbar features:

    • Option on mesh and groove backs.
    • Offers height adjustable lumbar as an option i.e. “vertical adjustment” with 2.3″ of travel.
    • Adjusts independently from the back.
    • Allows the user to promote the natural, forward curve of his/her lower back.
    • Promotes an optimal sitting position and the opportunity to maintain this posture throughout the entire work day.

    White adjustable lumbar. #LS4W

    user guide: view the guide (pdf)→

    adjustable lumbar features:

    • Option on mesh and groove backs.
    • Offers height adjustable lumbar as an option i.e. “vertical adjustment” with 2.3″ of travel.
    • Adjusts independently from the back.
    • Allows the user to promote the natural, forward curve of his/her lower back.
    • Promotes an optimal sitting position and the opportunity to maintain this posture throughout the entire work day.
  • Built-in adjustable lumbar supports.

    4u upholstered backs integrated adjustable lumbar support.

    user guide: view the guide (pdf)→

    adjustable lumbar features:

    • Integrated into upholstered backs. This is always included.
    • Adjusted through a tiny, black handle located on the right side of the back of the chair.
    • Offers height adjustable lumbar as an option i.e. “depth adjustment” with 2.3″ of travel.
    • Adjusts independently from the back.
    • Allows the user to promote the natural, forward curve of his/her lower back.
    • Promotes an optimal sitting position and the opportunity to maintain this posture throughout the entire work day.

     

    user guide: view the guide (pdf)→

bases

  • Chair swivel bases.

    Standard black nylon 5-star swivel base. #18BB

    • Standard base with black frames.

    Standard white nylon 5-star swivel base. #18WB

    • Standard base with white frames.

    Polished aluminum 5-star swivel base. #18PB

    Brushed aluminum 5-star swivel base. #18BA

  • Stool swivel bases.

    Standard black nylon 5-star swivel base with a stool kit. #18BB-11DR or #18BB-11XDR

    • Standard stool base with black frames.
    • Tall (-11DR) height range/stroke: 7 in.
    • Extra-tall (-11XDR) height range/stroke: 9.5 in.
    • See exact dimensions in the drawings section.

    Standard white nylon 5-star swivel base with a stool kit. #18WB-11DR or #18WB-11XDR

    • Standard stool base with white frames.
    • Tall (-11DR) height range/stroke: 7 in.
    • Extra-tall (-11XDR) height range/stroke: 9.5 in.
    • See exact dimensions in the drawings section.

    Polished aluminum 5-star swivel base with a stool kit. #18PB-11DR or #18PB-11XDR

    • Tall (-11DR) height range/stroke: 7 in.
    • Extra-tall (-11XDR) height range/stroke: 9.5 in.
    • See exact dimensions in the drawings section.

    Brushed aluminum 5-star swivel base with a stool kit. #18BA-11DR or #18BA-11XDR

    • Tall (-11DR) height range/stroke: 7 in.
    • Extra-tall (-11XDR) height range/stroke: 9.5 in.
    • See exact dimensions in the drawings section.

casters & glides

  • Casters.

    Standard black carpet casters. #16HP

    • Standard casters for all swivel bases.

    Two-toned black with grey soft rubber tread all floor casters. #16SCG

  • Glides.

    Black glides. #16GL

more customization

  • Embroidery.

    Embroidery on chair back.

    • Available on the chair back upholstery, in the front, only.
    • Must be a minimum of 2″ from all edges of the upholstery area.

designed by S.I. Design

Lorenzo Negrello was born in Pádova in 1953. He Graduatd in Architecture in Venice in 1977. From 1978 to 1988, he was a teacher of design at the Institute of Art in Pádova and at the Art Lycée in Venice.  Between 1980 and 1996, designer Lorenzo Negrello worked in partnership with architect Paolo Scagnellato, with two projects being nominated for the “Compasso d’Oro” Industrial Design award.

In 1996 Lorenzo founded S.I. Design with designers Mirco Pegoraro and Mauro Naletto.  S.I. specializes in furniture design, particularly for offices and communal spaces.  Today, their team of eight focuses on design and technical assistance in product development utilizing advanced modeling programs.

studio: Pádova, Italy.

Dimensions recorded by Via Seating engineers using:

  • the BIFMA Chair Measuring Device® (CMD) &

  • the BIFMA Universal Measuring Procedure.

chair drawings

  • Mesh back chairs using a quick adjust advanced synchro control, all seats. (780-67C, 781-67C, 782-67C, 783-67C).

    A. Overall height.

    B. Seat height.

    C. Seat width.

    D. Backrest width in lumbar support zone.

    E. Backrest height.

    F. Overall depth.

    G. Seat depth.
    seats Medium SL (780) Medium EC (781) Large SL (782) Large EC (783)
    A 37.3″ – 42.1″ 39.7″ – 41.9″ 37.3″ – 42.1″ 36.9″ – 41.7″
    B 16.6″ – 21.4″ 17.6″ – 19.7″ 15.6″ – 20.4″ 17.8″ – 22.6″
    C 19.5″ 21.0″ 20.5″ 22.2″
    D 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″
    E 22.5″ 21.7″ 22.5″ 21.9″
    F 28.2″ 27.4″ 28.2″ 27.9″
    G 16.3″ 15.1″ 16.3″ 18.3″
  • Mesh back chairs using a quick adjust advanced synchro control & a seat slide, all seats. (780-67CSS, 781-67C-SS, 782-67C-SS, 783-67C-SS).

    A. Overall height.

    B. Seat height.

    C. Seat width.

    D. Backrest width in lumbar support zone.

    E. Backrest height.

    F. Overall depth.

    G. Seat depth.
    seats Medium SL (780) Medium EC (782) Large SL (781) Large EC (783)
    A 38.2″ – 43.0″ 40.6″ – 45.4″ 38.2″ – 43.0″ 37.8″ – 42.6″
    B 17.1″ – 21.9″ 18.1″ – 22.9″ 16.1″ – 20.9″ 18.3″ – 23.1″
    C 19.5″ 21.0″ 20.5″ 22.2″
    D 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″
    E 21.5″ 20.7″ 21.5″ 20.9″
    F 28.2″ 27.4″ 28.2″ 27.9″
    G 15.1″ – 17.1″ 13.9″ – 15.9″ 15.1″ – 17.1″ 17.1″ – 19.1″
  • Mesh back chairs with an auto-adjust body balance control, all seats. (780-74C, 781-74C, 782-74C, 783-74C).

    A. Overall height.

    B. Seat height.

    C. Seat width.

    D. Backrest width in lumbar support zone.

    E. Backrest height.

    F. Overall depth.

    G. Seat depth.
    seats Medium SL (780) Medium EC (782) Large SL (781) Large EC (783)
    A 37.6″ – 42.4″ 40.0″ – 44.8″ 37.6″ – 42.4″ 37.2″ – 42.0″
    B 16.7″ – 21.5″ 17.7″ – 22.5″ 15.7″ – 20.5″ 17.9″ – 22.7″
    C 19.5″ 21.0″ 20.5″ 22.2″
    D 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″
    E 22.2″ 21.4″ 22.2″ 21.6″
    F 28.2″ 27.4″ 28.2″ 27.9″
    G 17.1″ 15.9″ 17.1″ 19.1″
  • Mesh back chairs with an auto-adjust body balance control & seat slide, all seats. (780-74C-12SS, 781-74C-12SS, 782-74C-12SS, 783-74C-12SS).

    A. Overall height.

    B. Seat height.

    C. Seat width.

    D. Backrest width in lumbar support zone.

    E. Backrest height.

    F. Overall depth.

    G. Seat depth.
    seats Medium SL (780) Medium EC (781) Large SL (782) Large EC (783)
    A 37.6″ – 42.4″ 40.0″ – 44.8″ 37.6″ – 42.4″ 37.2″ – 42.0″
    B 17.2″ – 22.0″ 18.2″ – 23.0″ 16.2″ – 21.0″ 18.4″ – 23.2″
    C 19.5″ 21.0″ 20.5″ 22.2″
    D 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″
    E 21.7″ 20.9″ 21.7″ 21.6″
    F 28.2″ 27.4″ 28.2″ 27.9″
    G 16.5″ – 18.5″ 15.3″ – 17.3″ 16.5″ – 18.5″ 18.5″ – 20.5″
  • Groove back chairs using a quick adjust advanced synchro control, all seats. (785-67C, 786-67C, 787-67C, 788-67C).

    A. Overall height.

    B. Seat height.

    C. Seat width.

    D. Backrest width in lumbar support zone.

    E. Backrest height.

    F. Overall depth.

    G. Seat depth.
    seats Medium SL (785) Medium EC (787) Large SL (786) Large EC (788)
    A 37.2″ – 42.0″ 37.1″ – 41.9″ 37.2″ – 42.0″ 36.9″ – 41.7″
    B 16.2″ – 21.0″ 17.5″ – 21.3″ 16.1″ – 20.9″ 17.8″ – 22.6″
    C 19.5″ 21.0″ 20.5″ 22.2″
    D 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″
    E 22.9″ 22.0″ 22.5″ 21.9″
    F 24.8″ 27.0″ 26.2″ 27.9″
    G 16.1″ 18.6″ 16.1″ 18.3″
  • Groove back chairs using a quick adjust advanced synchro control & a seat slide, all seats. (785-67C-SS, 786-67CSS, 787-67C-SS, 788-67C-SS).

    A. Overall height.

    B. Seat height.

    C. Seat width.

    D. Backrest width in lumbar support zone.

    E. Backrest height.

    F. Overall depth.

    G. Seat depth.
    seats Medium SL (785) Medium EC (787) Large SL (786) Large EC (788)
    A 38.1″ – 42.9″ 38.0″ – 42.8″ 38.1″ – 42.9″ 37.8″ – 42.6″
    B 16.7″ – 21.5″ 18.0″ – 22.8″ 16.6″ – 21.4″ 18.3″ – 23.1″
    C 19.5″ 21.0″ 20.5″ 22.2″
    D 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″
    E 22.9″ 21.0″ 21.5″ 20.9″
    F 24.8″ 27.0″ 26.2″ 27.9″
    G 14.9″ – 16.9″ 17.4″ – 19.4″ 14.9″ – 16.9″ 17.1″ – 19.1″
  • Groove back chairs with an auto-adjust body balance control, all seats. (785-74C, 786-74C, 787-74C, 788-74C).

    A. Overall height.

    B. Seat height.

    C. Seat width.

    D. Backrest width in lumbar support zone.

    E. Backrest height.

    F. Overall depth.

    G. Seat depth.
    seats Medium SL (785) Medium EC (787) Large SL (786) Large EC (788)
    A 37.5″ – 42.3″ 37.4″ – 42.2″ 37.5″ – 42.3″ 37.2″ – 42.0″
    B 16.3″ – 21.1″ 17.6″ – 22.4″ 16.2″ – 21.0″ 17.9″ – 22.7″
    C 19.5″ 21.0″ 20.5″ 22.2″
    D 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″
    E 22.6″ 21.7″ 22.2″ 21.6″
    F 24.8″ 27.0″ 26.2″ 27.9″
    G 16.9″ 19.4″ 16.9″ 19.1″
  • Groove back chairs with an auto-adjust body balance control & seat slide, all seats. (785-74C-12SS, 786-74C-12SS, 787-74C-12SS, 788-74C-12SS).

    A. Overall height.

    B. Seat height.

    C. Seat width.

    D. Backrest width in lumbar support zone.

    E. Backrest height.

    F. Overall depth.

    G. Seat depth.
    seats Medium SL (785) Medium EC (787) Large SL (786) Large EC (788)
    A 37.5″ – 42.3″ 37.4″ – 42.2″ 37.5″ – 42.3″ 37.2″ – 42.0″
    B 16.8″ – 21.6″ 18.1″ – 22.9″ 16.7″ – 21.5″ 18.4″ – 23.2″
    C 19.5″ 21.0″ 20.5″ 22.2″
    D 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″
    E 22.1″ 21.2″ 21.7″ 21.6″
    F 24.8″ 27.0″ 26.2″ 27.9″
    G 16.3″ – 18.3″ 18.8″ – 20.8″ 16.3″ – 18.3″ 18.5″ – 20.5″
  • Upholstered back chairs using a quick adjust advanced synchro control, all seats. (770-67C, 771-67C, 772-67C, 773-67C).

    A. Overall height.

    B. Seat height.

    C. Seat width.

    D. Backrest width in lumbar support zone.

    E. Backrest height.

    F. Overall depth.

    G. Seat depth.
    seats Medium SL (770) Medium EC (772) Large SL (771) Large EC (773)
    A 37.2″ – 42.0″ 37.2″ – 42.0″ 38.1″ – 42.9″ 37.2″ – 42.0″
    B 16.2″ – 21.0″ 17.0″ – 21.8″ 16.4″ – 21.2″ 18.2″ – 22.6″
    C 19.5″ 21.0″ 20.5″ 22.2″
    D 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″
    E 23.0″ 22.6″ 23.0″ 22.0″
    F 24.8″ 26.0″ 25.1″ 27.9″
    G 16.2″ 16.1″ 16.2″ 17.4″
  • Upholstered back chairs using a quick adjust advanced synchro control & a seat slide, all seats. (770-67C-SS, 771-67C-SS, 772-67CSS, 773-67C-SS).

    A. Overall height.

    B. Seat height.

    C. Seat width.

    D. Backrest width in lumbar support zone.

    E. Backrest height.

    F. Overall depth.

    G. Seat depth.
    seats Medium SL (770) Medium EC (772) Large SL (771) Large EC (773)
    A 38.1″ – 42.9″ 38.1″ – 42.9″ 39.0″ – 43.8″ 38.1″ – 42.9″
    B 16.7″ – 21.5″ 17.5″ – 22.3″ 16.9″ – 21.7″ 18.7″ – 23.5″
    C 19.5″ 21.0″ 20.5″ 22.2″
    D 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″
    E 23.0″ 21.6″ 22.0″ 21.0″
    F 24.8″ 26.0″ 25.1″ 27.9″
    G 15.0″ – 17.0″ 14.9″ – 16.9″ 15.0″ – 17.0″ 16.2″ – 18.2″
  • Upholstered back chairs with an auto-adjust body balance control, all seats. (770-74C, 771-74C, 772-74C, 773-74C).

    A. Overall height.

    B. Seat height.

    C. Seat width.

    D. Backrest width in lumbar support zone.

    E. Backrest height.

    F. Overall depth.

    G. Seat depth.
    seats Medium SL (770) Medium EC (772) Large SL (771) Large EC (773)
    A 37.5″ – 42.3″ 37.5″ – 42.3″ 38.4″ – 43.2″ 37.5″ – 42.3″
    B 16.3″ – 21.1″ 17.1″ – 21.9″ 16.5″ – 21.3″ 18.3″ – 23.1″
    C 19.5″ 21.0″ 20.5″ 22.2″
    D 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″
    E 22.7″ 22.3″ 22.7″ 21.7″
    F 24.8″ 26.0″ 25.1″ 27.9″
    G 17.0″ 16.9″ 17.0″ 18.2″
  • Upholstered back chairs with an auto-adjust body balance control & seat slide, all seats. (770-74C-12SS, 771-74C-12SS, 772-74C-12SS, 773-74C-12SS).

    A. Overall height.

    B. Seat height.

    C. Seat width.

    D. Backrest width in lumbar support zone.

    E. Backrest height.

    F. Overall depth.

    G. Seat depth.
    seats Medium SL (770) Medium EC (772) Large SL (771) Large EC (773)
    A 37.5″ – 42.3″ 37.5″ – 42.3″ 38.4″ – 43.2″ 37.5″ – 42.3″
    B 16.8″ – 21.6″ 17.1″ – 21.9″ 17.0″ – 21.8″ 18.8″ – 23.6″
    C 19.5″ 21.0″ 20.5″ 22.2″
    D 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″ 18.2″ – 19.0″
    E 22.2″ 21.8″ 22.2″ 21.2″
    F 24.8″ 26.0″ 25.1″ 27.9″
    G 16.4″ – 18.4″ 16.3″ – 18.3″ 16.4″ – 18.4″ 17.6″ – 19.6″

stool drawings

  • Mesh back stools, medium seats. (780, 782)

    A. Overall height.

    B. Seat height.

    C. Seat width.

    D. Backrest width in lumbar support zone.

    E. Backrest height.

    F. Overall depth.

    G. Seat depth.
    stool kits Medium SL (780) Medium EC (782)
    A 43.4″ – 50.4″ 43.4″ – 50.4″
    B 22.5″ – 29.5″ 21.5″ – 28.5″
    C 19.5″ 20.5″
    D 18.2″ – 19.0″ 18.2″ – 19.0″
    E 22.6″ 22.6″
    F 26.0″ 26.0″
    G 16.5″ 16.5″
  • Groove back stools, medium seats. (785, 787)

    A. Overall height.

    B. Seat height.

    C. Seat width.

    D. Backrest width in lumbar support zone.

    E. Backrest height.

    F. Overall depth.

    G. Seat depth.
    stool kits Medium SL (785) Medium EC (787)
    A 43.3″ – 50.3″ 43.3″ – 50.3″
    B 22.1″ – 29.1″ 22.0″ – 29.0″
    C 19.5″ 20.5″
    D 18.2″ – 19.0″ 18.2″ – 19.0″
    E 23.0″ 22.6″
    F 22.6″ 26.0″
    G 16.3″ 16.5″
  • Upholstered back stools, medium seats, (770, 771)

    A. Overall height.

    B. Seat height.

    C. Seat width.

    D. Backrest width in lumbar support zone.

    E. Backrest height.

    F. Overall depth.

    G. Seat depth.
    stool kits Medium SL (770) Medium EC (772)
    A 43.3″ – 50.3″ 44.2″ – 51.2″
    B 22.1″ – 29.1″ 22.3″ – 29.3″
    C 19.5″ 20.5″
    D 18.2″ – 19.0″ 18.2″ – 19.0″
    E 23.1″ 23.1″
    F 22.6″ 22.9″
    G 16.4″ 16.4″

seat drawings

 

Seat Reference Point (SRP),
The ergonomic seat depth measurement.

 

Measurement G (and not measurement H) is the true seat reference point. SRP is an ergonomic term that defines where there is a slight indentation in the lumbar (i.e. where the sitter is benefiting from the lumbar support) to the front edge of the seat. It gives the true measurement of surface area in contact with the body. It is very useful for correctly matching up with hip to knee measurements for ergonomists taking into account the two – three finger gap between the back of the leg to the edge of the seat. It is very important to ensure no restriction in circulation to the lower extremities (lower legs and ankles).

  • Mesh back, slim line medium seat. (780)

    C. Seat width.

    G. Seat depth.

    H. Seat depth of the seat off the chair.
    controls 74C 67C
    C 19.5″ (74C)
    19.5″ (74C-12SS)    		 19.5″ (67C)
    19.5″ (67C-SS)
    G 17.1″ (74C)
    16.5″ – 19.2″ (74C-12SS)    		 16.3″ (67C)
    15.1″ – 18.3″ (67C-SS)
    H 19.4″ (74C)
    19.4″ (74C-12SS)    		 19.4″ (67C)
    19.4″ (67C-SS)

    Additions to starting controls:

    • -12SS: Bolt-on seat depth adjustment.
    • 67CSS: 67C control with a seat slider.
  • Mesh back, slim line large seat. (781)

    C. Seat width.

    G. Seat depth.

    H. Seat depth of the seat off the chair.
    controls 74C 67C
    C 21.0″ (74C)
    21.0″ (74C-12SS)    		 21.0″ (67C)
    21.0″ (67C-SS)
    G 15.9″ (74C)
    15.3″ – 17.3″ (74C-12SS)    		 15.1″ (67C)
    13.9″ – 15.9″ (67C-SS)
    H 21.0″ (74C)
    21.0″ (74C-12SS)    		 21.0″ (67C)
    21.0″ (67C-SS)

    Additions to starting controls:

    • -12SS: Bolt-on seat depth adjustment.
    • 67CSS: 67C control with a seat slider.
  • Mesh back, enhanced comfort medium seat. (782)

    C. Seat width.

    G. Seat depth.

    H. Seat depth of the seat off the chair.
    controls 74C 67C
    C 20.5″ (74C)
    20.5″ (74C-12SS)    		 20.5″ (67C)
    20.5″ (67C-SS)
    G 17.1″ (74C)
    16.5″ – 18.5″ (74C-12SS)    		 16.3″ (67C)
    15.1″ – 17.1″ (67C-SS)
    H 20.0″ (74C)
    20.0″ (74C-12SS)    		 20.0″ (67C)
    20.0″ (67C-SS)

    Additions to starting controls:

    • -12SS: Bolt-on seat depth adjustment.
    • 67CSS: 67C control with a seat slider.
  • Mesh back, enhanced comfort large seat. (783)

    C. Seat width.

    G. Seat depth.

    H. Seat depth of the seat off the chair.
    controls 74C 67C
    C 22.2″ (74C)
    22.2″ (74C-12SS)    		 22.2″ (67C)
    22.2″ (67C-SS)
    G 18.3″ (74C)
    17.7″ – 19.1″ (74C-12SS)    		 19.1″ (67C)
    18.5″ – 20.5″ (67C-SS)
    H 20.0″ (74C)
    20.0″ (74C-12SS)    		 20.0″ (67C)
    20.0″ (67C-SS)

    Additions to starting controls:

    • -12SS: Bolt-on seat depth adjustment.
    • 67CSS: 67C control with a seat slider.
  • Groove back, slim line medium seat. (785)

    C. Seat width.

    G. Seat depth.

    H. Seat depth of the seat off the chair.
    controls 74C 67C
    C 19.5″ (74C)
    19.5″ (74C-12SS)    		 19.5″ (67C)
    19.5″ (67C-SS)
    G 16.9″ (74C)
    16.3″ – 18.3″ (74C-12SS)    		 16.1″ (67C)
    14.9″ – 16.9″ (67C-SS)
    H 19.4″ (74C)
    19.4″ (74C-12SS)    		 19.4″ (67C)
    19.4″ (67C-SS)

    Additions to starting controls:

    • -12SS: Bolt-on seat depth adjustment.
    • 67CSS: 67C control with a seat slider.
  • Groove back, slim line large seat. (786)

    C. Seat width.

    G. Seat depth.

    H. Seat depth of the seat off the chair.
    controls 74C 67C
    C 21.0″ (74C)
    21.0″ (74C-12SS)    		 21.0″ (67C)
    21.0″ (67C-SS)
    G 15.9″ (74C)
    15.3″ – 17.3″ (74C-12SS)    		 15.1″ (67C)
    13.9″ – 15.9″ (67C-SS)
    H 21.5″ (74C)
    21.5″ (74C-12SS)    		 21.5″ (67C)
    21.5″ (67C-SS)

    Additions to starting controls:

    • -12SS: Bolt-on seat depth adjustment.
    • 67CSS: 67C control with a seat slider.
  • Groove back, enhanced comfort medium seat. (787)

    C. Seat width.

    G. Seat depth.

    H. Seat depth of the seat off the chair.
    controls 74C 67C
    C 20.5″ (74C)
    20.5″ (74C-12SS)    		 20.5″ (67C)
    20.5″ (67C-SS)
    G 16.9″ (74C)
    16.3″ – 18.3″ (74C-12SS)    		 16.1″ (67C)
    14.9″ – 16.9″ (67C-SS)
    H 20.0″ (74C)
    20.0″ (74C-12SS)    		 20.0″ (67C)
    20.0″ (67C-SS)

    Additions to starting controls:

    • -12SS: Bolt-on seat depth adjustment.
    • 67CSS: 67C control with a seat slider.
  • Groove back, enhanced comfort large seat. (788)

    C. Seat width.

    G. Seat depth.

    H. Seat depth of the seat off the chair.
    controls 74C 67C
    C 22.2″ (74C)
    22.2″ (74C-12SS)    		 22.2″ (67C)
    22.2″ (67C-SS)
    G 19.1″ (74C)
    18.5″ – 20.5″ (74C-12SS)    		 18.3″ (67C)
    17.1″ – 19.1″ (67C-SS)
    H 20.0″ (74C)
    20.0″ (74C-12SS)    		 20.0″ (67C)
    20.0″ (67C-SS)

    Additions to starting controls:

    • -12SS: Bolt-on seat depth adjustment.
    • 67CSS: 67C control with a seat slider.
  • Upholstered back, slim line medium seat. (770)

    C. Seat width.

    G. Seat depth.

    H. Seat depth of the seat off the chair.
    controls 74C 67C
    C 19.5″ (74C)
    19.5″ (74C-12SS)    		 19.5″ (67C)
    19.5″ (67C-SS)
    G 17.0″ (74C)
    16.4″ – 18.4″ (74C-12SS)    		 16.2″ (67C)
    15.0″ – 17.0″ (67C-SS)
    H 19.4″ (74C)
    19.4″ (74C-12SS)    		 19.4″ (67C)
    19.4″ (67C-SS)

    Additions to starting controls:

    • -12SS: Bolt-on seat depth adjustment.
    • 67CSS: 67C control with a seat slider.
  • Upholstered back, slim line large seat. (771)

    C. Seat width.

    G. Seat depth.

    H. Seat depth of the seat off the chair.
    controls 74C 67C
    C 21.0″ (74C)
    21.0″ (74C-12SS)    		 21.0″ (67C)
    21.0″ (67C-SS)
    G 16.9″ (74C)
    16.3″ – 18.3″ (74C-12SS)    		 16.1″ (67C)
    14.9″ – 16.9″ (67C-SS)
    H 21.5″ (74C)
    21.5″ (74C-12SS)    		 21.5″ (67C)
    21.5″ (67C-SS)

    Additions to starting controls:

    • -12SS: Bolt-on seat depth adjustment.
    • 67CSS: 67C control with a seat slider.
  • Upholstered back, enhanced comfort medium seat. (772)

    C. Seat width.

    G. Seat depth.

    H. Seat depth of the seat off the chair.
    controls 74C 67C
    C 20.5″ (74C)
    20.5″ (74C-12SS)    		 20.5″ (67C)
    20.5″ (67C-SS)
    G 17.0″ (74C)
    16.4″ – 18.4″ (74C-12SS)    		 16.2″ (67C)
    15.0″ – 17.0″ (67C-SS)
    H 20.0″ (74C)
    20.0″ (74C-12SS)    		 20.0″ (67C)
    20.0″ (67C-SS)

    Additions to starting controls:

    • -12SS: Bolt-on seat depth adjustment.
    • 67CSS: 67C control with a seat slider.
  • Upholstered back, enhanced comfort large seat. (773)

    C. Seat width.

    G. Seat depth.

    H. Seat depth of the seat off the chair.
    controls 74C 67C
    C 22.2″ (74C)
    22.2″ (74C-12SS)    		 22.2″ (67C)
    22.2″ (67C-SS)
    G 18.2″ (74C)
    17.6″ – 19.6″ (74C-12SS)    		 17.4″ (67C)
    16.2″ – 18.2″ (67C-SS)
    H 20.0″ (74C)
    20.0″ (74C-12SS)    		 20.0″ (67C)
    20.0″ (67C-SS)

    Additions to starting controls:

    • -12SS: Bolt-on seat depth adjustment.
    • 67CSS: 67C control with a seat slider.

arm drawings

  • 4u arm with 6-way adjustment. (-33A, -35A)

    J. Armrest length.

    K. Armrest height.

    L. Armrest width.

    M. Width between armrests.
    seats slim line slim line large extra comfort extra comfort large
    J 7.9″ 7.9″ 7.9″ 7.9″
    K 5.0″ – 8.5″ 5.0″ – 8.5″ 5.0″ – 8.5″ 5.0″ – 8.5″
    L 25.9″ 26.7″ 25.9″ 26.7″
    M 18.9″ 19.7″ 18.9″ 19.7″
  • Basic height adjustable arm. (-38A)

    J. Armrest length.

    K. Armrest height.

    L. Armrest width.

    M. Width between armrests.
    seats slim line slim line large extra comfort extra comfort large
    J 7.9″ 7.9″ 7.9″ 7.9″
    K 5.2″ – 7.6″ 5.2″ – 7.6″ 5.2″ – 7.6″ 5.2″ – 7.6″
    L 25.5″
    25.5″ – 29.5″ (19AB)    		 26.3″
    26.3″ – 30.0″ (19AB)    		 25.5″
    25.5″ – 29.5″ (19AB)    		 26.3″
    26.3″ – 30.0″ (19AB)
    M 19.9″
    19.9″ – 23.9″ (19AB)    		 20.7″
    20.7″ – 24.7″ (19AB)    		 19.9″
    19.9″ – 23.9″ (19AB)    		 20.7″
    20.7″ – 24.7″ (19AB)
  • Roll back arm. (-39A)

    J. Armrest length.

    K. Armrest height.

    L. Armrest width.

    M. Width between armrests.
    seats slim line slim line large extra comfort extra comfort large
    J 7.9″ 7.9″ 7.9″ 7.9″
    K 4.9″ – 7.3″ 4.9″ – 7.3″ 4.9″ – 7.3″ 4.9″ – 7.3″
    L 25.7″ 26.5″ 25.7″ 26.5″
    M 20.0″ 20.8″ 20.0″ 20.8″
  • 8-way adjustable arm. (-51A, -52A, -53A)

    J. Armrest length.

    K. Armrest height.

    L. Armrest width.

    M. Width between armrests.
    seats slim line slim line large extra comfort extra comfort large
    J 7.9″ 7.9″ 7.9″ 7.9″
    K 5.5″ – 9.4″ 5.5″ – 9.4″ 5.5″ – 9.4″ 5.5″ – 9.4″
    L 27.6″
    27.6″ – 31.6″ (19AB)    		 28.4″
    28.4″ – 32.4″ (19AB)    		 27.6″
    27.6″ – 31.6″ (19AB)    		 28.4″
    28.4″ – 32.4″ (19AB)
    M 21.0″
    21.0″ – 25.0″ (19AB)    		 21.8″
    21.8″ – 25.8″ (19AB)    		 21.0″
    21.0″ – 25.0″ (19AB)    		 21.8″
    21.8″ – 25.8″ (19AB)
  • Fixed conference arm. (-46A)

    J. Armrest length.

    K. Armrest height.

    L. Armrest width.

    M. Width between armrests.
    seats slim line slim line large extra comfort extra comfort large
    J 6.6″ 6.6″ 6.6″ 6.6″
    K 5.3″ 5.3″ 5.3″ 5.3″
    L 26.2″ 27.0″ 26.2″ 27.0″
    M 19.7″ 20.5″ 19.7″ 20.5″
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Downloads

pricing

4u price list and specification guide 2021 pdf (1.84 MB)

brochures

4u brochure pdf (3.73 MB)
Copper Mesh Collection brochure pdf (4.38 MB)

books

Education Solutions book pdf (9.86 MB)
Healthcare Solutions book pdf (15.64 MB)
Look Book 2020 pdf (68.75 MB)
Solutions: Seating Collection Overview book pdf (9.99 MB)

symbols

4u 2D autoCAD files zip (4.8 MB)
4u 3D autoCAD files zip (38.51 MB)
4u revit files zip (3.55 MB)

certifications

BIFMA LEVEL 2 certification pdf (467.46 KB)
CLEAN AIR GOLD certification pdf (441.6 KB)

care

4u cleaning and care guidelines pdf (135.13 KB)

instructions

base to chair assembly instructions pdf (308.35 KB)

arm user guides

33A/35A 4u arm with 6 way adjustment user guide pdf (147.74 KB)
38A/38AG Basic height adjustable arm user guide pdf (148.87 KB)
39A roll back arm user guide pdf (146.55 KB)
51A/51AG/52A/53A 8-way adjustable arm user guide pdf (162.22 KB)

control user guides

35C auto-adjust body balance stool control user guide pdf (158.28 KB)
67C-SS-FT quick adjust advanced synchro control with a seat depth adjustment and forward tilt user guide pdf (159.89 KB)
67C-SS quick adjust advanced synchro control with a seat depth adjustment user guide pdf (156.52 KB)
67C quick adjust advanced synchro control user guide pdf (156.21 KB)
74C-12SS auto-adjust body balance control with a seat depth adjustment user guide pdf (157.06 KB)
74C auto-adjust body balance control user guide pdf (155.49 KB)

lumbar user guides

4u upholstered backs integrated adjustable lumbar support user guide pdf (145.96 KB)
LS4B/LS4W 4u adjustable lumbar support user guide pdf (148.62 KB)
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