School T-frame chair on a round tube, sizes 4-7

School T-frame chair on a round tube, sizes 4-7 is a student chair for middle and senior grades. The T-shaped support on a round tube provides stability and ample legroom, while the wide height-adjustment range lets a single model fit different size groups within one classroom. Unlike skid-base versions, the T-frame design has less floor contact and is easier to reposition during cleaning.

The overlay seat and backrest are made of bent-glued plywood 8.5–9.5 mm thick and finished with a clear water-based lacquer; corners are rounded, and the seat depth is adjustable. The steel frame is welded from round tubes 32×1.2 and 25×1.2 mm and a flat-oval tube 30×15×1.2 mm with a powder coating. Height is set with screws through frame holes at 430 mm (size 5), 460 mm (size 6) and 510 mm (size 7). Plastic caps on the tube ends protect the floor; fasteners have a protective-decorative coating.

The model suits classroom fit-outs.

• Overall dimensions: 405×460–480×(780)830–910 mm
• Size groups: 4(5)–7, seat height 430–510 mm
• Weight: 4.64 kg
• Seat and backrest: bent-glued plywood 8.5–9.5 mm, water-based lacquer, adjustable seat depth
• Frame: round tubes 32×1.2 and 25×1.2 mm, flat-oval 30×15 mm, powder-coated enamel
• Frame colors: yellow (RAL1018), lime (RAL6018), grey (RAL7035), graphite (RAL7024)

How does a round tube differ from a square one? A round-tube frame looks lighter and is easier to clean, with no sharp edges; in strength both options are rated for daily classroom loads.

What student height is the chair designed for? Adjustment covers size groups 5–7 (seat height 430–510 mm) — middle and senior students; base position 4 is set as the lowest option.

How many frame colors are available? Four RAL shades: yellow, lime, grey and graphite, allowing a single color scheme across a classroom or school.