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ROTA Slot – Water-Filled Ballast Base
Price range: £145.00 through £173.50 exc. VAT Price range: £174.00 through £208.20 inc. VAT
ROTA Slot is a water-filled ballast system for standard 3.5m temporary mesh fence panels, sold as a red and white pair providing 320kg of combined ballast.
- Unit configuration: One pair = two interlocking blocks (one red + one white)
- Span: 3500mm – the complete base for one 3.5m fence panel
- Empty weight: Approx. 26kg per pair
- Filled weight: 320kg per pair once water-filled
- Fastening: Integrated safety bolt system locks the fence panel to the base
- Wind tested: Up to 67.3 mph
- Material: Recyclable UV-resistant polyethylene
- Sold as: Red and white pair only – one pair per fence panel
- With fence panel option: Pair supplied with one Galvanised Steel Round Top Fence Panel (TF-30-RT-001-PGA). No separate fence feet required.
- Ideal for long-span mesh or hoarding fence
- Durable, heavy-duty construction for tough site conditions
- Quick and easy installation
Order stocked items before 2pm for dispatch within 1 to 2 working days.
Free delivery on orders over £1,500 exc. VAT (England & Wales).
Buying for a project? Get a bulk quote and we will price your full list.
Have a credit account? Call 0330 056 4420 or email sales@securasite.co.uk to order on account.
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Product Details
ROTA Slot Water-Filled Ballast Base for 3.5m Fence Panels
The ROTA Slot is a water-filled ballast system manufactured for supporting standard 3.5m anti-climb temporary mesh fence panels. It is used on construction sites, roadworks, event perimeters and civil projects where temporary fencing needs to stand securely without ground fixing.
Each ROTA Slot is a pair of two interlocking blocks – one red and one white – that slot together to span the full 3500mm width of a standard fence panel. One pair forms the complete base for one fence panel. Each block weighs approximately 13kg empty, so both blocks can be handled and positioned before filling without any lifting equipment. Once both blocks are filled with water on site, the pair provides 320kg of combined ballast. The integrated safety bolt fastening then locks the fence panel directly to the base, securing it mechanically against tampering and displacement rather than relying on weight alone.
Available as a pair on its own, or as a pair with a Galvanised Steel Round Top Fence Panel included for a ready-to-deploy set. No separate fence feet are required with either option – the two blocks serve as the panel base.
Key Features
- Two-block interlocking design: Each block is approximately 1750mm long. The pair slots together to span 3500mm, forming the complete base for one 3.5m fence panel.
- Approx. 13kg per block when empty: Each block can be positioned by one person before filling. No machinery needed during installation.
- 320kg combined ballast per pair: Removes the need for separate loose concrete blocks or sandbags alongside the fence line.
- Replaces fence feet entirely: The two blocks serve as the panel base. No thermoplastic fence feet are needed.
- Safety bolt fastening: Locks the fence panel mechanically to the base. The panel cannot be lifted out or displaced without releasing the bolt.
- Wind tested to 67.3 mph: Manufacturer-tested for bare anti-climb mesh panels. Always carry out a site-specific risk assessment for exposed locations.
- Recyclable UV-resistant polyethylene: Designed for prolonged outdoor use. Recyclable at end of service life.
What You Receive:
| Variant | SKU | What is supplied | Fence panel |
|---|---|---|---|
| Red and White pair | ROTA-SLOT-RED/WHT | 1 x red block + 1 x white block with integrated safety bolt fastening. Together these form the complete 3500mm base for one 3.5m fence panel. | Not included – order separately |
| Red and White pair with fence panel | ROTA-SLOT-RED/WHT-CW-FENCE | 1 x red block + 1 x white block with integrated safety bolt fastening + 1 x Temporary Fencing Round Top Panel Galvanised Steel (TF-30-RT-001-PGA). No separate fence feet required. | Included – TF-30-RT-001-PGA, 3450mm x 2025mm, 15kg, galvanised steel, round top, 40mm horizontal pitch |
Not included with either variant: fence couplers, and reflective strips (available on request).
Specifications
Complete Pair (Two Blocks)
| Specification | Detail |
|---|---|
| Product name | ROTA Slot Water-Filled Ballast Base |
| Sold as | Pair only (one red block + one white block) |
| Combined length (both blocks) | 3500mm |
| Individual block length | Approx. 1750mm |
| Width | 400mm |
| Height | 300mm |
| Empty weight (pair) | Approx. 26kg combined |
| Filled weight (pair) | 320kg combined |
| Pairs per fence panel | 1 pair per 3.5m fence panel |
| Wind tested | Up to 67.3 mph – manufacturer testing, bare mesh panels only |
| Material | Recyclable UV-resistant polyethylene |
| Fastening | Integrated safety bolt fastening system |
| Fence feet required | No – the ROTA Slot pair replaces fence feet entirely |
| Compatible panel size | Standard 3.5m x 2m anti-climb temporary mesh fence panels |
| Pairs per full load | 147 pairs (294 individual blocks) |
| Fence line coverage per full load | 515 linear metres |
| Standard colours | Red and White (one of each per pair) |
| Custom colours | Available on request for project quantities |
| Reflective strips | Optional – available on request |
Included Fence Panel – CW-FENCE Variant Only
| Specification | Detail |
|---|---|
| Panel product | Temporary Fencing Round Top Panel – Galvanised Steel |
| Panel SKU | TF-30-RT-001-PGA |
| Panel length | 3450mm |
| Panel height | 2025mm |
| Panel weight | 15kg |
| Panel material | Galvanised steel |
| Panel type | Anti-climb mesh, round top, 40mm horizontal pitch |
| Fence feet | Not required – the ROTA Slot pair serves as the complete base |
Variant Reference
| Variant | SKU | What is supplied | Best for |
|---|---|---|---|
| Red and White pair | ROTA-SLOT-RED/WHT | 1 x red block + 1 x white block. Complete 3500mm base for one 3.5m fence panel. Fence panel not included. | New fence panel installation |
| Red and White pair with fence panel | ROTA-SLOT-RED/WHT-CW-FENCE | 1 x red block + 1 x white block + 1 x TF-30-RT-001-PGA (3450mm x 2025mm galvanised steel round top panel). No fence feet required. | New installation – base and panel together |
Application Suitability Guide
The ROTA Slot pair is used wherever standard fence feet are not sufficient or practical: on hard-standing sites where ground fixing is not available, on longer or more exposed fence runs, or where panel tampering is a concern. Order one pair per fence panel in the run.
For reference only, not legal advice. Always carry out your own site risk assessment before use.
| Application | Suitable | Why it fits | Caution or better option |
|---|---|---|---|
| Construction site perimeter fencing | Yes | One pair per panel. Safety bolt fastening and 320kg combined ballast give a more secure base than feet and loose blocks on long perimeter runs. | If sheeting or debris netting will be fitted to panels, carry out a wind loading assessment before use. The 67.3 mph test applies to bare unclad panels only. |
| Roadworks and traffic management zones | Yes | Wind tested to 67.3 mph. The pair spans the full panel base, keeping the ballast footprint compact and within the fence line. | Confirm traffic management scheme requirements with your works coordinator. Reflective strips can be added to the blocks on request. |
| Event perimeter fencing | Yes | Each block is approx. 13kg empty so both blocks can be handled without machinery. Water filling on site removes the need to transport pre-filled ballast. | Confirm crowd pressure conditions and wind for the venue. Call us on 0330 056 4420 for event quantities and delivery planning. |
| Hard-standing surfaces (concrete, tarmac) | Yes | Fully freestanding, no ground penetration. Each block is placed and filled in position, removing loose blocks and sandbags from the fence line. | On sloping or polished hard-standing, confirm both blocks sit flat and stable before filling. |
| Sites where ground fixing is restricted | Yes | No ground penetration required. Suitable for areas with underground services, tree root protection zones or heritage paving. | None specific. |
| Fence panels with sheeting or debris netting | Confirm before use | 320kg combined ballast provides considerably more resistance than standard fence feet and loose blocks. | Sheeting and netting significantly increase wind loading. The 67.3 mph test is for bare mesh panels only. Carry out a wind loading assessment before adding any cladding. |
| Soft or waterlogged ground | Confirm before use | Blocks can be placed on firm ground. On soft or waterlogged surfaces the blocks may not sit level once filled. | On soft ground, standard fence feet with ballast blocks may give more flexibility for foot placement. Contact our team for guidance. |
Compatibility and Accessory Guide
| Item | Status | Why it matters | Notes |
|---|---|---|---|
| Temporary Fencing Round Top Panel – Galvanised Steel (TF-30-RT-001-PGA) | Required (pair variant) | The ROTA Slot pair is a base only. A compatible 3.5m fence panel is needed to complete the installation. | Not included with ROTA-SLOT-RED/WHT. Included with ROTA-SLOT-RED/WHT-CW-FENCE. Available at securasite.com/product/temporary-fencing-round-top-panel-galvanised-steel/ |
| Fence feet (thermoplastic) | Not required | The ROTA Slot pair replaces fence feet entirely. The panel base tube slots directly into the groove along the two blocks. | If converting an existing feet-and-blocks setup, remove the feet before installing the ROTA Slot pairs. |
| Standard fence couplers | Required | Joins adjacent panels across the run. One coupler per panel join. | Not included with any variant. Available from Securasite |
| Lockable fence couplers | Optional | Adds key-operated locking to each panel join, complementing the ROTA Slot's safety bolt fastening on higher-security perimeters. | Available from Securasite |
| Flexi Reflective Strip | Optional | Improves visibility of the fence run on road-adjacent and low-light sites. | Available at securasite.com/product/flexi-reflective-strip/ Block-specific reflective strips for the ROTA Slot are also available on request from our team. |
| Fence sheeting or debris netting | Confirm before use | Physically compatible with the fence panels but significantly increases wind loading on the panel and base. | The 67.3 mph wind test applies to bare mesh panels only. Carry out a wind loading assessment before fitting any cladding. |
| SlotBlock Barrier | Alternative | Also a two-block pair system. Taller profile at 600mm. Confirmed 90-degree rotation for corner layouts. | Consider the SlotBlock if your layout requires corners or a taller visible base. Available from Securasite |
| Standard thermoplastic fence feet | Alternative | Lower-cost option for short-term or lower-risk applications. Requires separate loose ballast blocks alongside. | Available from Securasite |
Frequently Asked Questions
What is the ROTA Slot and how does it work?
The ROTA Slot is a water-filled ballast system for standard 3.5m temporary mesh fence panels. Each pair consists of two interlocking blocks – one red and one white – that slot together to span the full 3500mm width of a fence panel. Once positioned, both blocks are filled with water on site to provide 320kg of combined ballast. The integrated safety bolt fastening then locks the fence panel to the base, securing it against displacement and tampering rather than relying on weight alone.
How many pairs do I need for my fence run?
One pair per fence panel. A run of ten 3.5m panels requires ten pairs. If you are planning a project, contact our team on 0330 056 4420 or email sales@securasite.co.uk and we can confirm quantities, check stock across our five UK depots and coordinate delivery to site.
Does the fence panel come with the ROTA Slot pair?
Not with the standard pair variant (ROTA-SLOT-RED/WHT). Fence panels are ordered separately. If you want the base and panel supplied together, select the ROTA-SLOT-RED/WHT-CW-FENCE variant. This includes the complete red and white pair plus one Temporary Fencing Round Top Panel Galvanised Steel (TF-30-RT-001-PGA, 3450mm x 2025mm, galvanised steel, anti-climb mesh). No separate fence feet are required. You will still need fence couplers to join panels along the run.
Do I need fence feet alongside the ROTA Slot?
No. The ROTA Slot pair replaces fence feet entirely. The panel base tube slots into the groove running along the top of both blocks when assembled. There is no need to order separate thermoplastic feet or loose ballast blocks.
What are the weights?
Each block in the pair weighs approximately 13kg empty, so both blocks can be handled and positioned by one person without any lifting equipment. Once both blocks are filled with water on site, the pair reaches 320kg of combined ballast. There is no need for separate concrete blocks or sandbags alongside the ROTA Slot.
Is the ROTA Slot wind tested?
Yes. it has been tested to wind speeds of up to 67.3 mph. This figure applies to standard bare anti-climb mesh fence panels. If sheeting, debris netting or any cladding is added to the panels, wind loading increases significantly and a site-specific wind loading assessment is needed before installation. If you have questions about your specific setup, call us on 0330 056 4420.
Can I use the ROTA Slot with fence sheeting or debris netting?
The blocks are physically compatible with standard fence panels, but adding sheeting or debris netting substantially increases wind load on the panel and base. The 67.3 mph wind test figure is for bare, unclad mesh panels only. Carry out a wind loading assessment for your site conditions before fitting any cladding to panels supported by the ROTA Slot.
Why buy from Securasite rather than a general supplier?
We stock and supply the ROTA Slot from five regional depots across the UK – Wolverhampton, Wigan, Rochester, Brentwood and Livingston – which reduces delivery distances and gives more consistent lead times for most UK locations. Our sales team is available Monday to Friday, 8am to 5:30pm for stock confirmation, quantity planning and order support. White label delivery is available on request for hire companies and contractor accounts. Securasite holds Constructionline and CHAS Elite accreditations, meeting the procurement compliance requirements of most principal contractors and local authorities. Call us on 0330 056 4420 or email sales@securasite.co.uk.
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