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The BSEN1433 C250 SMC Composite Gully Grating is engineered for efficient surface water drainage in urban and road infrastructure. Manufactured from high-strength Sheet Moulding Compound (SMC), it meets the BSEN1433 C250 load standard (250KN) while offering superior hydraulic performance, corrosion resistance, and significantly reduced weight compared to traditional cast iron gratings.
High-Efficiency Drainage & Lightweight Design: The grating design maximizes open area for optimal water flow, effectively preventing surface water accumulation. With weights starting from just 6.5kg, it is exceptionally lightweight, simplifying transport, installation, and maintenance in compliance with Manual Handling Regulations.
Durable, Safe & Low-Maintenance: Constructed from inherently corrosion-resistant SMC, it eliminates rust and withstands harsh environmental chemicals. The surface features Avatar's proprietary multi-directional anti-slip pattern (SRV 89) for safety in wet conditions. It has no scrap value, deterring theft.
Proven Material Performance & Customization: The SMC material exhibits excellent weatherability, with UV aging tests showing only ~10% flexural strength loss. Available in various depths (45mm, 50mm, 70mm) and sizes, it can be customized for specific project requirements, including color matching.
Avatar SMC Performance index
Anti slip pattern
Avatar cover of composite access covers achieved a market leading Skid Resistance Value of 89
The table below has been developed from data collected by County
Surveyors Society and illustrates the acceptabable parameters when tested using the TRRL Pendulum Test in general accordance with BS667:part 1:1986
This test provides a slip resistance value(SRV) for each surface tested The higher value the greater slip resistance.
TRRL Pengulum Value | Condition Of Surface |
19 and below | Dangerous |
20-39 | Marginal |
40-74 | Satisfactory |
Adove75 | Excelient |
UV resistance test
Table 3-1 Ultravioler Test Conditions Standard Source Duration of Exposure ASTM G154
Standard | Source | Duratlon of Exposure |
ASTM G154a(Cycle 1) | UVA:340nm | 2,160hours |
ASTM G154b(Cycle 1) | Xenon Arc:340nm | 1,000hours |
ASTM G154(Cycle 3)c | UVB:Type313 | 2,160hours |
Results Summary | ||
Average Flexural Strength Before UV aging (MPa) | Average Flexural Strength After UV aging (MPa) | Average Flexural Strength due to UV aging(%) (MPa) |
910 | 820 | 10 |
The loss of flexural strength was measured to be approximately 10%
Meet the specifications of BSEN1433-125loading
Our Third Party Testing Bodies: LLOYDS BRITISH, ICAS, SGS
PRODUCT CODE | DRAINAGE PORT | COVER SIZE (mm) | DEPTH (mm) | Weight (Kg) | LOADING (KN) |
PSB5401 | SINGLE | 385X235 | 70 | 6.5 | 250 |
PSB5402 | SINGLE | 408X404 | 70 | 12.5 | 250 |
PSB5403 | SINGLE | 550X340 | 45 | 12.5 | 250 |
PSB5404 | DOUBLE | 605X290 | 45 | 10 | 250 |
PSB5405 | SINGLE | 740X455 | 50 | 250 |
Performance advantages | SMC Manhole cover | Reinforced concrete manhole cover | Cast iron manhole cover |
Design service | >50 | <10 | >30 |
Fire performance | A2 ,non-combustible | A1,Burst in high temperature | A2, non-combustible |
Structural loads | High product structral strength | Low strength,thick product,unable to blend with steel bars | High product structral strength |
Corrosion resistance | Acid and alkali resistance,strong corrosion resistance | Easy corrosion | Easy corrosion |
Weight | Light | Extra heavy | weight |
Install | Simple and convenient | Tired | Tired |
Jump resistance | No bounce | No bounce | Can bounce |
Overhaul | Opening with ease | Difficult to open | Difficult to open |
Broken state | Will not shatter or break | Comminted fracture | Comminted fracture |
Road & Highway Drainage: Ideal for expressways, urban streets, and residential roads requiring C250 load-class drainage alongside curbs or in pavement.
Pedestrian & Cycle Areas: Suitable for footpaths, plazas, and cycle lanes where safe, efficient drainage and aesthetic integration are important.
Commercial & Logistics Parks: Effective for parking lots, loading bays, and industrial yards to manage surface runoff from light to medium vehicular traffic.
1. How much lighter is this SMC grating compared to a traditional cast iron one?
It is significantly lighter. Our lightest model (PSB5401) weighs only 6.5kg, making it much easier and safer to handle, transport, and install than equivalent cast iron gratings, reducing labor time and costs.
2. Is the C250 load class suitable for road use?
Yes, the BSEN1433 C250 rating (250KN) is designed for medium-duty traffic and is commonly used for express roads, urban streets, and residential areas. For very heavy-duty applications like ports, we recommend our D400-grade products.
3. How slip-resistant is the surface, especially when wet?
Extremely slip-resistant. The grating features our proprietary anti-slip pattern, which achieves a Skid Resistance Value (SRV) of 89 in standardized tests—a rating classified as “Excellent” for safety in wet conditions.
For detailed CAD drawings, load tables, or a project-specific quotation, please contact our technical team.
The BSEN1433 C250 SMC Composite Gully Grating is engineered for efficient surface water drainage in urban and road infrastructure. Manufactured from high-strength Sheet Moulding Compound (SMC), it meets the BSEN1433 C250 load standard (250KN) while offering superior hydraulic performance, corrosion resistance, and significantly reduced weight compared to traditional cast iron gratings.
High-Efficiency Drainage & Lightweight Design: The grating design maximizes open area for optimal water flow, effectively preventing surface water accumulation. With weights starting from just 6.5kg, it is exceptionally lightweight, simplifying transport, installation, and maintenance in compliance with Manual Handling Regulations.
Durable, Safe & Low-Maintenance: Constructed from inherently corrosion-resistant SMC, it eliminates rust and withstands harsh environmental chemicals. The surface features Avatar's proprietary multi-directional anti-slip pattern (SRV 89) for safety in wet conditions. It has no scrap value, deterring theft.
Proven Material Performance & Customization: The SMC material exhibits excellent weatherability, with UV aging tests showing only ~10% flexural strength loss. Available in various depths (45mm, 50mm, 70mm) and sizes, it can be customized for specific project requirements, including color matching.
Avatar SMC Performance index
Anti slip pattern
Avatar cover of composite access covers achieved a market leading Skid Resistance Value of 89
The table below has been developed from data collected by County
Surveyors Society and illustrates the acceptabable parameters when tested using the TRRL Pendulum Test in general accordance with BS667:part 1:1986
This test provides a slip resistance value(SRV) for each surface tested The higher value the greater slip resistance.
TRRL Pengulum Value | Condition Of Surface |
19 and below | Dangerous |
20-39 | Marginal |
40-74 | Satisfactory |
Adove75 | Excelient |
UV resistance test
Table 3-1 Ultravioler Test Conditions Standard Source Duration of Exposure ASTM G154
Standard | Source | Duratlon of Exposure |
ASTM G154a(Cycle 1) | UVA:340nm | 2,160hours |
ASTM G154b(Cycle 1) | Xenon Arc:340nm | 1,000hours |
ASTM G154(Cycle 3)c | UVB:Type313 | 2,160hours |
Results Summary | ||
Average Flexural Strength Before UV aging (MPa) | Average Flexural Strength After UV aging (MPa) | Average Flexural Strength due to UV aging(%) (MPa) |
910 | 820 | 10 |
The loss of flexural strength was measured to be approximately 10%
Meet the specifications of BSEN1433-125loading
Our Third Party Testing Bodies: LLOYDS BRITISH, ICAS, SGS
PRODUCT CODE | DRAINAGE PORT | COVER SIZE (mm) | DEPTH (mm) | Weight (Kg) | LOADING (KN) |
PSB5401 | SINGLE | 385X235 | 70 | 6.5 | 250 |
PSB5402 | SINGLE | 408X404 | 70 | 12.5 | 250 |
PSB5403 | SINGLE | 550X340 | 45 | 12.5 | 250 |
PSB5404 | DOUBLE | 605X290 | 45 | 10 | 250 |
PSB5405 | SINGLE | 740X455 | 50 | 250 |
Performance advantages | SMC Manhole cover | Reinforced concrete manhole cover | Cast iron manhole cover |
Design service | >50 | <10 | >30 |
Fire performance | A2 ,non-combustible | A1,Burst in high temperature | A2, non-combustible |
Structural loads | High product structral strength | Low strength,thick product,unable to blend with steel bars | High product structral strength |
Corrosion resistance | Acid and alkali resistance,strong corrosion resistance | Easy corrosion | Easy corrosion |
Weight | Light | Extra heavy | weight |
Install | Simple and convenient | Tired | Tired |
Jump resistance | No bounce | No bounce | Can bounce |
Overhaul | Opening with ease | Difficult to open | Difficult to open |
Broken state | Will not shatter or break | Comminted fracture | Comminted fracture |
Road & Highway Drainage: Ideal for expressways, urban streets, and residential roads requiring C250 load-class drainage alongside curbs or in pavement.
Pedestrian & Cycle Areas: Suitable for footpaths, plazas, and cycle lanes where safe, efficient drainage and aesthetic integration are important.
Commercial & Logistics Parks: Effective for parking lots, loading bays, and industrial yards to manage surface runoff from light to medium vehicular traffic.
1. How much lighter is this SMC grating compared to a traditional cast iron one?
It is significantly lighter. Our lightest model (PSB5401) weighs only 6.5kg, making it much easier and safer to handle, transport, and install than equivalent cast iron gratings, reducing labor time and costs.
2. Is the C250 load class suitable for road use?
Yes, the BSEN1433 C250 rating (250KN) is designed for medium-duty traffic and is commonly used for express roads, urban streets, and residential areas. For very heavy-duty applications like ports, we recommend our D400-grade products.
3. How slip-resistant is the surface, especially when wet?
Extremely slip-resistant. The grating features our proprietary anti-slip pattern, which achieves a Skid Resistance Value (SRV) of 89 in standardized tests—a rating classified as “Excellent” for safety in wet conditions.
For detailed CAD drawings, load tables, or a project-specific quotation, please contact our technical team.
