SR60+ Sinusoidal Roofing Sheet
Premium sinusoidal profile for industrial, commercial and distribution roof systems. Cover width 850mm, 60mm depth, engineered for spans up to 5.2m with proven load performance across three steel gauges.
Available in galvanised and polyester white finishes. Supplied to BS EN 10346:2015. Complies with BS 5427:2019 for material and BS 476 Pt7 for fire performance (Class 1).
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Typical Applications
Industrial Facilities
Manufacturing plants, warehouses, factory units and production halls where robustness and long-span capability are essential.
Commercial Buildings
Retail, office canopies, terrace covers and extension roofing where aesthetic finish and weather tightness combine with structural performance.
Distribution & Logistics
Large-span sheds, storage facilities and consolidation centres requiring rapid installation and cost-effective roofing solutions.
Plant Room Enclosures
Covered plant areas including pump houses, boiler rooms and external equipment shelters with robust weather protection.
Roof Refurbishment
Re-roofing existing industrial and commercial structures where rapid installation minimises downtime and disruption.
Why This System Is Used
Proven profile design: The 60mm depth sinusoidal profile provides excellent structural stiffness whilst maintaining practical cover widths and pitches. The 213mm pitch and curved crowns (100mm radius) and valleys (62mm radius) deliver both load capacity and weather performance.
Long span capability: SR60+ achieves spans from 2.0m to 5.2m depending on gauge and load case, reducing the need for intermediate supports and lowering support frame costs.
Material choice: Available in three gauges (0.7, 0.9, 1.2mm) from a single production line. Steel grades to BS EN 10143:2016 ensure consistent mechanical properties. Galvanised (Z275) and polyester white (Z150 + 25μm) coatings provide durability in exposed environments.
Fire compliance: Class 1 (BS 476 Pt7) and Class 0 surface rating where specified, supporting building regulations for medium-to-high-risk properties.
Key Technical Features
Cover Width & Pitch
850mm cover width; 213mm pitch. Sinusoidal crown and valley geometry with 100mm and 62mm radii respectively.
Steel Grade & Thickness
S350 (BS EN 10143:2016, BS EN 10346:2015) in 0.7, 0.9, 1.2mm gauges. Maximum sheet length 12m.
Coatings
Galvanised Z275 (275g/m²) or Polyester White (150g/m² Z150 base + 25μm polyester topcoat).
Fire Performance
Class 1 (BS 476 Pt7); Class 0 surface rating available. Complies with BS 5427:2019.
Span Capability
2.0–5.2m depending on gauge, load case and deflection criteria. Partial safety factor 1.5 applied.
Fixing & Lap Details
Fixed every trough at sheet end; 150mm end lap, intermediate fixing every trough, 450mm side lap and 450mm side support spacing.
Section Properties
| Gauge (mm) | Weight (kg/m²) | Area (mm²/m) | Top Moment of Capacity (kNm/m) | Top Moment of Inertia (10³mm⁴/m) | Bot Moment of Capacity (kNm/m) | Bot Moment of Inertia (10³mm⁴/m) |
|---|---|---|---|---|---|---|
| 0.7 | 8.02 | 917 | 4.15 | 58.2 | 4.93 | 52.2 |
| 0.9 | 10.33 | 1265 | 7.41 | 65.5 | 7.56 | 73.4 |
| 1.2 | 13.80 | 1706 | 11.01 | 107.3 | 10.97 | 106.8 |
Properties based on steel grade S350, BS EN 10143:2016. Load tables and deflection calculations available on request.
Need detailed load tables for your design?
Design & Specification Considerations
Load Cases & Deflection Criteria
SR60+ is designed and tested to accept both gravity loads (live load plus permanent load) and uplift loads (wind suction). Deflection limits are set at Span/200 for gravity cases and Span/90 for uplift cases, applied with a partial safety factor of 1.5 on material strength.
Bearing requirements are 60mm on supporting frame members. This ensures that concentrated loads at fixing points do not cause crushing or local deformation of the trough. Support frame design should specify adequate stiffness to limit deflection of the primary structure, reducing secondary impacts on the roof sheeting.
Site Conditions & Pitch
SR60+ is suitable for pitches between 5° and 30°, with performance optimised in the 10°–25° range. At lower pitches (below 8°), sealant may be applied to side lap joints in exposed locations to enhance weather tightness. This is a site decision dependent on local exposure and building orientation.
In areas of severe exposure (coastal, high altitude, industrial pollution), the polyester white finish is recommended over galvanised to provide longer-term weather protection. Specify BS EN 10346:2015 Zn/Al alloy coating (Z275 equivalent) for enhanced corrosion resistance if required.
Gauge Selection & Cost Trade-Offs
The 0.7mm gauge is cost-optimised for standard-span applications (2.0–3.5m) with conventional live loads. The 0.9mm gauge extends capability to 4.0–4.5m and is widely specified in multi-span continuous layouts. The 1.2mm gauge is used for long spans (4.5–5.2m) or where additional stiffness is required (e.g. heavily trafficked plant areas or high-snow-load regions).
Our technical team can review load cases and recommend gauge to balance specification durability with project budget. Load tables and span charts are provided as part of our supply and design service.
Installation Considerations
Sheet Fixing & Lap Details
Each sheet is fixed to the support frame at every trough at sheet ends (approximately every 213mm across the 850mm width). Intermediate fixing is every trough along the length of the sheet. End lap is 150mm, allowing for a single row of fasteners; side lap is 450mm, providing sufficient engagement for wind resistance. Side support members are spaced 450mm apart to ensure lateral stability during installation and service.
Fastening & Tool Hire
Self-drilling screws (typically 6.3 × 32mm or 6.3 × 38mm) are standard for both end lap and side lap fixing. A pneumatic or electric fixing tool significantly speeds installation and ensures consistent torque. RMD Profiles offers tool hire for projects requiring faster cycle times or where labour cost-saving is a priority.
Safety & Weather Protection
Installation teams should follow standard roof safety practices, including use of harnesses, edge protection and weather monitoring. For projects involving full roof replacement or high-risk areas, RMD Profiles supplies and installs proprietary safety netting to protect personnel and prevent debris falling into the building during the works. This is available as a supply-only or supply-and-fix service depending on your requirements.
Inspection & Quality Control
Visual inspection of sheets before fixing should check for transport damage, correct gauge and coating, and that fixing details match the specification drawings. Post-installation, all fasteners should be inspected for correct seating and torque. Our technical team can advise on inspection protocols and can arrange site visits for larger projects.
Planning your SR60+ installation?
Common Problems This System Solves
Spanning Large Roof Areas
SR60+ reaches 5.2m spans without intermediate supports, reducing steel frame costs and simplifying installation on broad industrial and commercial structures.
Weather Tightness
Deep sinusoidal troughs with 100mm crown radius shed water effectively. Side lap detail (450mm) and end lap (150mm) are proven in exposed UK and temperate climates.
Fire & Building Control
Class 1 fire rating and Class 0 surface assessment meet stringent building regulations for medium-to-high-risk commercial and industrial properties.
Durability in Harsh Conditions
Polyester white finish and galvanised options protect against coastal exposure, industrial pollution and high-rainfall regions, with 20+ year service life expected in most UK locations.
Installation Speed & Cost
Wide cover width (850mm) and simple fixing detail mean fewer sheets per roof area, faster installation and lower labour costs compared to shallow-pitch micro-profiles.
Refurbishment & Overlay
SR60+ can be laid over existing flat or damaged roofing without extensive substrate preparation, shortening project timelines and reducing waste removal costs.
RMD Profiles Services
Supply Only
Material supply with telephone and email technical support. Suitable for projects where your design team or main contractor manages specification and installation.
Supply and Design
Our supply and design service includes layout drawings and specification guidance tailored to your project. We review your structural engineer’s loads, recommend gauge and fastening details, and provide setting-out drawings for the installation team. This is a charged service and removes uncertainty from the specification process.
Supply and Fix
Full material supply and professional installation. Our certified installation teams follow industry standards and building regulations. We handle all site safety protocols, coordinate with main contractors, and provide snagging and inspection on completion.
Tool Hire
Pneumatic and electric fixing tools available for hire on a daily, weekly or project basis. Tool hire accelerates installation and ensures consistent fastener torque, reducing callbacks for loose screws or weather ingress.
Safety Netting
Temporary safety netting systems for roofing projects where personnel protection or debris containment is required. Supplied and installed to CIRIA guidelines and current safety legislation.
Technical Support
Specification advice, product selection guidance and load table provision. Contact our technical team early in your design process to explore options and confirm suitability for your application.
About SR60+ Sinusoidal Roofing
The SR60+ is a medium-depth sinusoidal metal roofing profile engineered for industrial, commercial and distribution applications across the UK. With an 850mm cover width and 60mm depth, it delivers spans of up to 5.2m whilst maintaining excellent weather tightness and fire performance. Available in three steel gauges (0.7mm, 0.9mm, 1.2mm) and two finish options (galvanised Z275 or polyester white), the SR60+ combines performance with cost-effectiveness for new builds and refurbishment projects.
Manufactured to BS EN 10346:2015 and compliant with BS 5427:2019 for roof sheeting, SR60+ achieves Class 1 fire rating (BS 476 Pt7) and can be specified for Class 0 surface assessment where building regulations demand enhanced fire safety. The sinusoidal profile’s curved geometry provides structural stiffness without excessive weight, making it popular for retrofit roofing where existing structural capacity may be limited.
RMD Profiles supplies SR60+ across the UK with design and technical support. Whether your project requires material only or a complete design-and-install solution, our team can advise on gauge selection, span capabilities and installation methodology to meet your budget and programme. Contact us for a quotation or to discuss your roofing specification in detail.
Frequently Asked Questions
What is the maximum span for SR60+ at 0.7mm gauge?
At 0.7mm gauge, SR60+ typically achieves spans of 2.0–3.5m depending on applied loads and deflection criteria. The 0.9mm gauge extends this to 3.5–4.5m, and 1.2mm reaches 4.5–5.2m. Exact spans are determined by load case (gravity, wind uplift, snow) and support conditions. Request a load table from our technical team to confirm span for your specific project.
Can SR60+ be used on pitches below 10°?
Yes, SR60+ is suitable for pitches as low as 5°, though performance is optimised in the 10°–25° range. On lower pitches and in exposed locations, sealant may be applied to side lap joints to enhance weather tightness. Consult our technical team if your project involves shallow pitch or high-exposure conditions.
What is the difference between galvanised and polyester white finishes?
Galvanised (Z275, 275g/m²) is cost-effective and provides adequate corrosion protection in most UK environments. Polyester white (150g/m² Z150 base + 25μm topcoat) offers enhanced durability in coastal, industrial or high-rainfall areas, with longer service life and better colour retention. For most new builds and refurbishment projects in standard exposure, galvanised is sufficient; polyester is recommended for harsh or exposed locations.
How does RMD Profiles’ supply and design service work?
Our supply and design service includes technical review of your structural loads, gauge recommendation, fixing detail drawing, and setting-out layouts for the installation team. This is a charged service that removes guesswork and ensures compliance with building regulations. It is particularly valuable on complex roofs, large areas or where refurbishment requires overlay design. Contact our team to discuss scope and pricing.
Is sealant required on SR60+?
Sealant is not routinely applied on SR60+ unless specified for low-pitch or very exposed applications. The sinusoidal profile and 450mm side lap provide adequate water shedding in standard UK climates. Sealant application is a site decision based on pitch, exposure and water penetration risk. Our technical team can advise if your project location or pitch warrants sealant.
What are the maximum sheet lengths available?
SR60+ sheets are supplied up to 12m in length. Longer sheets reduce the number of end laps and fastening points, lowering installation labour and material waste. On projects with roof lengths exceeding 12m, multiple sheets are joined using 150mm end lap detail. Our supply and design service includes layout drawings optimising sheet length and lap positioning for your roof dimensions.
Still have questions about SR60+?
Ready to Specify SR60+ for Your Project?
Our team is here to help with quotations, technical guidance, load tables and full design-and-install solutions.
RMD Profiles Ltd — Roof metal decking, guttering and building envelope solutions across the UK.
