A bright red classroom chair engineered with a flexible high-back for spinal support and a secure leg base to prevent backward tilting.
Vividly coloured student chair featuring a gas-injected shell for extra strength and a protective grey coating on the metal underframe.
Size chart showing school chair dimensions by age group, including height, seat depth, and weight for children aged 3 to 14+ years. Ideal for selecting age-appropriate classroom seating.

Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: Size 5 Red Anti-Tilt Secondary Seating

The Cobolt Red Size 5 Chair provides a durable and ergonomically sound foundation for students transitioning through Key Stage 3. Dispatched with Free UK Mainland Delivery, it is built to survive the high-frequency cleaning and heavy daily use required in busy high school classrooms.

Senior Posture & Sustainability

  • KS3 Ergonomic Support: Adhering to Size 5 EN1729 standards, the 430mm seat height ensures students maintain a healthy lumbar position while keeping feet firmly planted.
  • Improved Blood Flow: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.
  • Eco-Responsible Lifecycle: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution's carbon reduction targets.

Vandal Resistance

Secondary classroom assets must be exceptionally resilient. We utilize heavy-duty, tamperproof fixings to lock the shell to the grey steel frame, eliminating the risk of students loosening parts and ensuring a safe, rattle-free experience.

The Cobolt Standard

  • Institutional Expertise: For over 50 years, we have supplied UK secondary schools with high-strength seating engineered for the demands of the modern teenager.
  • Direct-to-School Free Delivery: Our Free UK Mainland Delivery policy eliminates shipping overheads, regardless of the size of your secondary refit.
  • 15-Year Operational Guarantee: Enjoy total peace of mind with a 15-year warranty that protects your capital expenditure against structural failures.

Where is this Size 5 Red Anti-Tilt Chair utilised?

The Red Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Science Laboratories, Senior School Libraries, and Secondary IT Suites. Its adult-strength frame combined with student-specific dimensions makes it an incredibly versatile asset for diverse educational settings.

Key Features

  • Anti-Tilt Safety Frame – The angled rear legs proactively inhibit students from rocking back, reducing classroom accidents.
  • Size 5 (11-14 Years) – Precision-engineered 430mm seat height for the mid-secondary age demographic.
  • 15-Year Structural Guarantee – Industry-leading warranty covering both frame welds and plastic shell integrity.
  • 4.3kg Unit Weight – Robust construction that remains manageable for cleaning staff to move and stack.
  • Grey Powder-Coated Steel – Slate-tone metallic finish that resists scratches and heavy daily wear.
  • Stackable Design – Efficient vertical stacking allows for easy classroom reconfiguration and clearing.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and the high-traffic school environment.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Secondary Estates

  • 50 Years of Expertise: We understand the specific durability and hygiene needs of high-traffic senior school environments.
  • Free UK Mainland Delivery: We manage the delivery of classroom refits at no extra cost, keeping your project within allocated budgets.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution's carbon reduction targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific demographics.

Senior Safety. Guaranteed Reliability.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary students, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) and depth (380mm) are perfectly scaled for the 11-14 year old stature.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated learning or exam sessions.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the powder-coated grey legs.
  • Every unit is backed by a 15-year manufacturer's guarantee, covering structural frame integrity and shell defects for long-term institutional use.

The Size 5 Red Anti-Tilt Chair combines certified secondary ergonomics with an adult-strength safety frame. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3 classrooms.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Year 7 through Year 9
Seat Dimensions
405mm (W) x 380mm (D)
Ergonomically sized for mid-secondary students
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to move for staff
Frame Finish
Slate Grey Powder Coated Steel
Vandal and scratch resistant finish
Weight Limit
125kg (19.6 stone)
Superior structural resilience
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Eco-friendly product lifecycle

FAQs: Secondary Classroom Seating Solutions

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during the transition from primary school.

Q: How does the "Anti-Tilt" mechanism actually work?

A: The rear legs are set at a specific outward angle. This shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards even if a student leans back. This proactively prevents falls and related focus disruptions.

Q: Is the Crimson Red colour resistant to staining?

A: Yes. The high-grade polypropylene shell is non-porous. Juice spills, ink, or paints cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid scarlet colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group work without structural risk.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamperproof fasteners to secure the shell to the grey steel legs. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: How high can these chairs be safely stacked?

A: These units are designed for safe vertical stacking, allowing cleaning staff to clear floor space efficiently after the school day ends. Their lightweight 4.3kg build makes them easy to move for reconfiguration.

Q: Does this chair comply with fire and safety regulations?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for UK school furniture regarding ergonomics, strength, and structural durability.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of expertise, we are a trusted heritage partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the modern curriculum.

FAQs: Sourcing Secondary Classroom Seating

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during the transition from primary school.

Q: How does the "Anti-Tilt" mechanism proactively prevent accidents?

A: Secondary students are often active and prone to rocking on their chairs. The angled rear frame shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards, thereby proactively preventing falls.

Q: Is the Cherry Red shell resistant to school laboratory chemicals?

A: Yes. The high-grade polypropylene is non-porous. Spills from common school chemicals, ink, or paints cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid crimson colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group sessions without structural risk.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamperproof fasteners to secure the shell to the grey steel legs. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: How easy are these chairs to store during cleaning?

A: These chairs are designed for vertical stacking, allowing cleaning staff to clear floor space efficiently after the school day ends. Their robust 4.3kg build remains light enough to move for classroom reconfiguration.

Q: Does this chair comply with fire and safety regulations?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for UK secondary furniture regarding ergonomics, strength, and structural durability.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of expertise, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the modern curriculum.

Overview

Product Overview: Size 5 Red Anti-Tilt Secondary Seating

The Cobolt Red Size 5 Chair provides a durable and ergonomically sound foundation for students transitioning through Key Stage 3. Dispatched with Free UK Mainland Delivery, it is built to survive the high-frequency cleaning and heavy daily use required in busy high school classrooms.

Senior Posture & Sustainability

  • KS3 Ergonomic Support: Adhering to Size 5 EN1729 standards, the 430mm seat height ensures students maintain a healthy lumbar position while keeping feet firmly planted.
  • Improved Blood Flow: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.
  • Eco-Responsible Lifecycle: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution's carbon reduction targets.

Vandal Resistance

Secondary classroom assets must be exceptionally resilient. We utilize heavy-duty, tamperproof fixings to lock the shell to the grey steel frame, eliminating the risk of students loosening parts and ensuring a safe, rattle-free experience.

The Cobolt Standard

  • Institutional Expertise: For over 50 years, we have supplied UK secondary schools with high-strength seating engineered for the demands of the modern teenager.
  • Direct-to-School Free Delivery: Our Free UK Mainland Delivery policy eliminates shipping overheads, regardless of the size of your secondary refit.
  • 15-Year Operational Guarantee: Enjoy total peace of mind with a 15-year warranty that protects your capital expenditure against structural failures.

Features & Benefits

Where is this Size 5 Red Anti-Tilt Chair utilised?

The Red Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Science Laboratories, Senior School Libraries, and Secondary IT Suites. Its adult-strength frame combined with student-specific dimensions makes it an incredibly versatile asset for diverse educational settings.

Key Features

  • Anti-Tilt Safety Frame – The angled rear legs proactively inhibit students from rocking back, reducing classroom accidents.
  • Size 5 (11-14 Years) – Precision-engineered 430mm seat height for the mid-secondary age demographic.
  • 15-Year Structural Guarantee – Industry-leading warranty covering both frame welds and plastic shell integrity.
  • 4.3kg Unit Weight – Robust construction that remains manageable for cleaning staff to move and stack.
  • Grey Powder-Coated Steel – Slate-tone metallic finish that resists scratches and heavy daily wear.
  • Stackable Design – Efficient vertical stacking allows for easy classroom reconfiguration and clearing.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and the high-traffic school environment.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Secondary Estates

  • 50 Years of Expertise: We understand the specific durability and hygiene needs of high-traffic senior school environments.
  • Free UK Mainland Delivery: We manage the delivery of classroom refits at no extra cost, keeping your project within allocated budgets.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution's carbon reduction targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific demographics.

Safety & Warranty

Senior Safety. Guaranteed Reliability.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary students, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) and depth (380mm) are perfectly scaled for the 11-14 year old stature.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated learning or exam sessions.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the powder-coated grey legs.
  • Every unit is backed by a 15-year manufacturer's guarantee, covering structural frame integrity and shell defects for long-term institutional use.

Specification Dimensions

The Size 5 Red Anti-Tilt Chair combines certified secondary ergonomics with an adult-strength safety frame. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3 classrooms.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Year 7 through Year 9
Seat Dimensions
405mm (W) x 380mm (D)
Ergonomically sized for mid-secondary students
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to move for staff
Frame Finish
Slate Grey Powder Coated Steel
Vandal and scratch resistant finish
Weight Limit
125kg (19.6 stone)
Superior structural resilience
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Eco-friendly product lifecycle

Delivery & Returns

FAQs: Secondary Classroom Seating Solutions

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during the transition from primary school.

Q: How does the "Anti-Tilt" mechanism actually work?

A: The rear legs are set at a specific outward angle. This shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards even if a student leans back. This proactively prevents falls and related focus disruptions.

Q: Is the Crimson Red colour resistant to staining?

A: Yes. The high-grade polypropylene shell is non-porous. Juice spills, ink, or paints cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid scarlet colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group work without structural risk.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamperproof fasteners to secure the shell to the grey steel legs. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: How high can these chairs be safely stacked?

A: These units are designed for safe vertical stacking, allowing cleaning staff to clear floor space efficiently after the school day ends. Their lightweight 4.3kg build makes them easy to move for reconfiguration.

Q: Does this chair comply with fire and safety regulations?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for UK school furniture regarding ergonomics, strength, and structural durability.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of expertise, we are a trusted heritage partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the modern curriculum.

Product FAQs

FAQs: Sourcing Secondary Classroom Seating

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during the transition from primary school.

Q: How does the "Anti-Tilt" mechanism proactively prevent accidents?

A: Secondary students are often active and prone to rocking on their chairs. The angled rear frame shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards, thereby proactively preventing falls.

Q: Is the Cherry Red shell resistant to school laboratory chemicals?

A: Yes. The high-grade polypropylene is non-porous. Spills from common school chemicals, ink, or paints cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid crimson colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group sessions without structural risk.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamperproof fasteners to secure the shell to the grey steel legs. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: How easy are these chairs to store during cleaning?

A: These chairs are designed for vertical stacking, allowing cleaning staff to clear floor space efficiently after the school day ends. Their robust 4.3kg build remains light enough to move for classroom reconfiguration.

Q: Does this chair comply with fire and safety regulations?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for UK secondary furniture regarding ergonomics, strength, and structural durability.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of expertise, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the modern curriculum.

Red Ergonomic Anti-Tilt Secondary Seating - Grey Safety Frame - Size 5

Product code: CH45RE
Modernise your mid-secondary learning environments with the Cobolt Scarlet Polypropylene Anti-Tilt Chair (Size 5 / 11-14 Years). Specifically produced...

Inc VAT

Exc VAT

£56.00

£46.67

Colours - Red
Age - 11-14 Years

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Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: Size 5 Red Anti-Tilt Secondary Seating

The Cobolt Red Size 5 Chair provides a durable and ergonomically sound foundation for students transitioning through Key Stage 3. Dispatched with Free UK Mainland Delivery, it is built to survive the high-frequency cleaning and heavy daily use required in busy high school classrooms.

Senior Posture & Sustainability

  • KS3 Ergonomic Support: Adhering to Size 5 EN1729 standards, the 430mm seat height ensures students maintain a healthy lumbar position while keeping feet firmly planted.
  • Improved Blood Flow: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.
  • Eco-Responsible Lifecycle: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution's carbon reduction targets.

Vandal Resistance

Secondary classroom assets must be exceptionally resilient. We utilize heavy-duty, tamperproof fixings to lock the shell to the grey steel frame, eliminating the risk of students loosening parts and ensuring a safe, rattle-free experience.

The Cobolt Standard

  • Institutional Expertise: For over 50 years, we have supplied UK secondary schools with high-strength seating engineered for the demands of the modern teenager.
  • Direct-to-School Free Delivery: Our Free UK Mainland Delivery policy eliminates shipping overheads, regardless of the size of your secondary refit.
  • 15-Year Operational Guarantee: Enjoy total peace of mind with a 15-year warranty that protects your capital expenditure against structural failures.

Where is this Size 5 Red Anti-Tilt Chair utilised?

The Red Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Science Laboratories, Senior School Libraries, and Secondary IT Suites. Its adult-strength frame combined with student-specific dimensions makes it an incredibly versatile asset for diverse educational settings.

Key Features

  • Anti-Tilt Safety Frame – The angled rear legs proactively inhibit students from rocking back, reducing classroom accidents.
  • Size 5 (11-14 Years) – Precision-engineered 430mm seat height for the mid-secondary age demographic.
  • 15-Year Structural Guarantee – Industry-leading warranty covering both frame welds and plastic shell integrity.
  • 4.3kg Unit Weight – Robust construction that remains manageable for cleaning staff to move and stack.
  • Grey Powder-Coated Steel – Slate-tone metallic finish that resists scratches and heavy daily wear.
  • Stackable Design – Efficient vertical stacking allows for easy classroom reconfiguration and clearing.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and the high-traffic school environment.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Secondary Estates

  • 50 Years of Expertise: We understand the specific durability and hygiene needs of high-traffic senior school environments.
  • Free UK Mainland Delivery: We manage the delivery of classroom refits at no extra cost, keeping your project within allocated budgets.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution's carbon reduction targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific demographics.

Senior Safety. Guaranteed Reliability.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary students, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) and depth (380mm) are perfectly scaled for the 11-14 year old stature.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated learning or exam sessions.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the powder-coated grey legs.
  • Every unit is backed by a 15-year manufacturer's guarantee, covering structural frame integrity and shell defects for long-term institutional use.

The Size 5 Red Anti-Tilt Chair combines certified secondary ergonomics with an adult-strength safety frame. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3 classrooms.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Year 7 through Year 9
Seat Dimensions
405mm (W) x 380mm (D)
Ergonomically sized for mid-secondary students
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to move for staff
Frame Finish
Slate Grey Powder Coated Steel
Vandal and scratch resistant finish
Weight Limit
125kg (19.6 stone)
Superior structural resilience
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Eco-friendly product lifecycle

FAQs: Secondary Classroom Seating Solutions

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during the transition from primary school.

Q: How does the "Anti-Tilt" mechanism actually work?

A: The rear legs are set at a specific outward angle. This shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards even if a student leans back. This proactively prevents falls and related focus disruptions.

Q: Is the Crimson Red colour resistant to staining?

A: Yes. The high-grade polypropylene shell is non-porous. Juice spills, ink, or paints cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid scarlet colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group work without structural risk.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamperproof fasteners to secure the shell to the grey steel legs. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: How high can these chairs be safely stacked?

A: These units are designed for safe vertical stacking, allowing cleaning staff to clear floor space efficiently after the school day ends. Their lightweight 4.3kg build makes them easy to move for reconfiguration.

Q: Does this chair comply with fire and safety regulations?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for UK school furniture regarding ergonomics, strength, and structural durability.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of expertise, we are a trusted heritage partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the modern curriculum.

FAQs: Sourcing Secondary Classroom Seating

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during the transition from primary school.

Q: How does the "Anti-Tilt" mechanism proactively prevent accidents?

A: Secondary students are often active and prone to rocking on their chairs. The angled rear frame shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards, thereby proactively preventing falls.

Q: Is the Cherry Red shell resistant to school laboratory chemicals?

A: Yes. The high-grade polypropylene is non-porous. Spills from common school chemicals, ink, or paints cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid crimson colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group sessions without structural risk.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamperproof fasteners to secure the shell to the grey steel legs. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: How easy are these chairs to store during cleaning?

A: These chairs are designed for vertical stacking, allowing cleaning staff to clear floor space efficiently after the school day ends. Their robust 4.3kg build remains light enough to move for classroom reconfiguration.

Q: Does this chair comply with fire and safety regulations?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for UK secondary furniture regarding ergonomics, strength, and structural durability.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of expertise, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the modern curriculum.

Overview

Product Overview: Size 5 Red Anti-Tilt Secondary Seating

The Cobolt Red Size 5 Chair provides a durable and ergonomically sound foundation for students transitioning through Key Stage 3. Dispatched with Free UK Mainland Delivery, it is built to survive the high-frequency cleaning and heavy daily use required in busy high school classrooms.

Senior Posture & Sustainability

  • KS3 Ergonomic Support: Adhering to Size 5 EN1729 standards, the 430mm seat height ensures students maintain a healthy lumbar position while keeping feet firmly planted.
  • Improved Blood Flow: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.
  • Eco-Responsible Lifecycle: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution's carbon reduction targets.

Vandal Resistance

Secondary classroom assets must be exceptionally resilient. We utilize heavy-duty, tamperproof fixings to lock the shell to the grey steel frame, eliminating the risk of students loosening parts and ensuring a safe, rattle-free experience.

The Cobolt Standard

  • Institutional Expertise: For over 50 years, we have supplied UK secondary schools with high-strength seating engineered for the demands of the modern teenager.
  • Direct-to-School Free Delivery: Our Free UK Mainland Delivery policy eliminates shipping overheads, regardless of the size of your secondary refit.
  • 15-Year Operational Guarantee: Enjoy total peace of mind with a 15-year warranty that protects your capital expenditure against structural failures.

Features & Benefits

Where is this Size 5 Red Anti-Tilt Chair utilised?

The Red Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Science Laboratories, Senior School Libraries, and Secondary IT Suites. Its adult-strength frame combined with student-specific dimensions makes it an incredibly versatile asset for diverse educational settings.

Key Features

  • Anti-Tilt Safety Frame – The angled rear legs proactively inhibit students from rocking back, reducing classroom accidents.
  • Size 5 (11-14 Years) – Precision-engineered 430mm seat height for the mid-secondary age demographic.
  • 15-Year Structural Guarantee – Industry-leading warranty covering both frame welds and plastic shell integrity.
  • 4.3kg Unit Weight – Robust construction that remains manageable for cleaning staff to move and stack.
  • Grey Powder-Coated Steel – Slate-tone metallic finish that resists scratches and heavy daily wear.
  • Stackable Design – Efficient vertical stacking allows for easy classroom reconfiguration and clearing.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and the high-traffic school environment.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Secondary Estates

  • 50 Years of Expertise: We understand the specific durability and hygiene needs of high-traffic senior school environments.
  • Free UK Mainland Delivery: We manage the delivery of classroom refits at no extra cost, keeping your project within allocated budgets.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution's carbon reduction targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific demographics.

Safety & Warranty

Senior Safety. Guaranteed Reliability.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary students, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) and depth (380mm) are perfectly scaled for the 11-14 year old stature.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated learning or exam sessions.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the powder-coated grey legs.
  • Every unit is backed by a 15-year manufacturer's guarantee, covering structural frame integrity and shell defects for long-term institutional use.

Specification Dimensions

The Size 5 Red Anti-Tilt Chair combines certified secondary ergonomics with an adult-strength safety frame. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3 classrooms.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Year 7 through Year 9
Seat Dimensions
405mm (W) x 380mm (D)
Ergonomically sized for mid-secondary students
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to move for staff
Frame Finish
Slate Grey Powder Coated Steel
Vandal and scratch resistant finish
Weight Limit
125kg (19.6 stone)
Superior structural resilience
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Eco-friendly product lifecycle

Delivery & Returns

FAQs: Secondary Classroom Seating Solutions

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during the transition from primary school.

Q: How does the "Anti-Tilt" mechanism actually work?

A: The rear legs are set at a specific outward angle. This shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards even if a student leans back. This proactively prevents falls and related focus disruptions.

Q: Is the Crimson Red colour resistant to staining?

A: Yes. The high-grade polypropylene shell is non-porous. Juice spills, ink, or paints cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid scarlet colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group work without structural risk.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamperproof fasteners to secure the shell to the grey steel legs. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: How high can these chairs be safely stacked?

A: These units are designed for safe vertical stacking, allowing cleaning staff to clear floor space efficiently after the school day ends. Their lightweight 4.3kg build makes them easy to move for reconfiguration.

Q: Does this chair comply with fire and safety regulations?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for UK school furniture regarding ergonomics, strength, and structural durability.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of expertise, we are a trusted heritage partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the modern curriculum.

Product FAQs

FAQs: Sourcing Secondary Classroom Seating

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during the transition from primary school.

Q: How does the "Anti-Tilt" mechanism proactively prevent accidents?

A: Secondary students are often active and prone to rocking on their chairs. The angled rear frame shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards, thereby proactively preventing falls.

Q: Is the Cherry Red shell resistant to school laboratory chemicals?

A: Yes. The high-grade polypropylene is non-porous. Spills from common school chemicals, ink, or paints cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid crimson colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group sessions without structural risk.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamperproof fasteners to secure the shell to the grey steel legs. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: How easy are these chairs to store during cleaning?

A: These chairs are designed for vertical stacking, allowing cleaning staff to clear floor space efficiently after the school day ends. Their robust 4.3kg build remains light enough to move for classroom reconfiguration.

Q: Does this chair comply with fire and safety regulations?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for UK secondary furniture regarding ergonomics, strength, and structural durability.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of expertise, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the modern curriculum.

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