4u chairs
4u Model: 787-W-74C-53A20S-18WB-16HP-02UG | Fabric: ArcCom Rogue Fog (Seat). finally, a chair 4u
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 X5.1 General-Purpose Office Chairs (BIFMA Compliant).
- ANSI/BIFMA X5.11 General-Purpose Large Occupant Office Chairs (BIFMA Compliant).
- 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).
- Meets the Practice Greenhealth, Health Care Without Harm Healthy Interiors Criteria for Seating (ie. HHI compliant).
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
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Frame finishes.
Matte black. #B
- Black finish is standard.
- Finish applied to mesh frame.
Matte white. #W
- Finish applied to mesh frame.
meshes
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Mesh colors.
Standard Black. #01U
Black mesh is standard for mesh back chairs.
Graphite. #03U
Stardust. #02U
-
Copper mesh colors.
Natural Copper Striped. #13U
Black Copper. #11U
-
Groove colors.
Standard Black. #01UG
Black groove is standard for mesh back chairs.
Dark Grey. #02UG
Light Grey. #03UG
Taupe. #04UG
Blue. #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: video » | pdf »
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: video » | pdf »
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: video » | pdf »
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: video » | pdf »
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: video » | pdf »
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.
-
Fixed arms.
Black fixed conference arm with fixed cap. #46A
- Permanent armrest is fixed.
control mechanisms
- Body balance control mechanisms.
-
Synchro control mechanisms.
Quick adjust advanced synchro. #67C
user guide: video » | pdf »
control mechanism adjustments:
- Seat height adjustment.
- Back tension adjustment.
- Single rotation back tilt lock adjustment (5 position).
Quick adjust advanced synchro with a seat depth adjustment. #67C-SS
user guide: video » | pdf »
control mechanism adjustments:
- Seat height adjustment.
- Back tension adjustment.
- Single rotation back tilt lock adjustment (5 position).
- Seat depth adjustment. #SS
Quick adjust advanced synchro with a seat depth adjustment & a forward tilt adjustment. #67C-SS-FT
user guide: video » | pdf »
control mechanism adjustments:
- Seat height adjustment.
- Back tension adjustment.
- Single rotation back tilt lock adjustment (5 position).
- Seat depth adjustment. #SS
- Ergonomic forward tilt adjustment. #FT
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Task stool control mechanism.
Stool control. #35C
user guide: 11DR/11XDR video » |footring video » | pdf »
control mechanism adjustments:
- Seat height adjustment.
- Back lock adjustment (3 position).
- Foot ring height adjustment.
adjustable lumbars
-
Optional adjustable lumbar supports.
Black adjustable lumbar. #LS4B
user guide: video » | 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: video » | 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: video » | 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.
bases
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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
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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
upholstery layouts
more customization
-
Embroidery.
Embroidery on front of chair back.
- Offered on upholstered backs only.
- Must be a minimum of 1″ 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.
Downloads
pricing
| 4u price list 2022 | (1.93 MB) |
brochures
| 4u brochure | (3.73 MB) | |
| Copper Mesh Collection brochure | (4.04 MB) |
books
| Solutions Overview book 2021 | (78.22 MB) | |
| Via Look book 2021 | (68.71 MB) |
symbols
| 4u 2D autoCAD files | zip | (2.04 MB) |
| 4u 3D autoCAD files | zip | (61.03 MB) |
certifications
| BIFMA LEVEL 2 certification | (169.11 KB) | |
| CLEAN AIR GOLD certification | (176.86 KB) |
care
| 4u cleaning and care guidelines | (135.13 KB) |
instructions
| base to chair assembly instructions | (291.99 KB) |
arm user guides
| 33A/35A 4u arm with 6 way adjustment user guide | (147.74 KB) | |
| 38A/38AG Basic height adjustable arm user guide | (148.87 KB) | |
| 39A roll back arm user guide | (146.55 KB) | |
| 51A/51AG/52A/53A 8-way adjustable arm user guide | (162.22 KB) |
control user guides
| 35C stool control user guide | (158.28 KB) | |
| 67C-SS-FT control user guide | (161.7 KB) | |
| 67C-SS control user guide | (158.22 KB) | |
| 67C control user guide | (156.21 KB) | |
| 74C-12SS control user guide | (157.06 KB) | |
| 74C control user guide | (155.49 KB) |
lumbar user guides
| 4u upholstered backs integrated adjustable lumbar support user guide | (145.96 KB) | |
| LS4B/LS4W 4u adjustable lumbar support user guide | (148.62 KB) |