Product

Thundaflo

SPEL Thundaflo is a heavy-duty channel drainage system (aka trench, linear or slot), uniquely designed for the industrial environment – forecourts, forklift working areas, truck loading bays, airports.


Available in 125mm, 200mm, & 300mm Widths.

SPEL Thundaflo
SPEL Thundaflo

Thundaflo - 125 Series

Diagrams & Specifications

SPEL Thundaflo 125 Series

  1. Maximum design flow rates are theoretical minimums using Mannings n=0.012 with 30mm freeboard below grating.
  2. Zero Fall Sections are used where surface slope exists or to extend drain length.
  3. Channel sections can be custom designed (% fall, length) to suit site specific conditions.
    (additional lead time is required)
  4. Overall drain length can be cut to size to less that 0.5m multiples if required, extra charges will apply.

 

SPEL Thundaflo 125

  1. Maximum design flow rates are theoretical minimums using
  2. Mannings n=0.012 with 30mm freeboard below grating.
    Zero Fall Sections are used where surface slope exists or to extend drain length.
  3. Channel sections can be custom designed (% fall, length) to suit site specific conditions.
    (additional lead time is required)
  4. Overall drain length can be cut to size to less that 0.5m multiples if required, extra charges will apply.

SPEL Thundaflo

  1. Maximum design flow rates are theoretical minimums using Mannings n=0.012 with 30mm freeboard below grating.
  2. Zero Fall Sections are used where surface slope exists or to extend drain length.
  3. Channel sections can be custom designed (% fall, length) to suit site specific conditiions.
    (additional lead time is required)
  4. Overall drain length can be cut to size to less that 0.5m multiples if required, extra charges will apply.

SPEL Thundaflo Series 125

  1. Maximum design flow rates are theoretical minimums using Mannings n=0.012 with 30mm freeboard below grating.
  2. Zero Fall Sections are used where surface slope exists or to extend drain length.
  3. Channel sections can be custom designed (% fall, length) to suit site specific conditiions.
    (additional lead time is required)
  4. Overall drain length can be cut to size to less that 0.5m multiples if required, extra charges will apply.

Gratings

125-series-powered-coated-dutile-iron-grating

Thundaflo Powered Coated Dutile Iron Grating

SPEL Thundaflo

125-series-galvanised-mesh-grating-diagram

Inline Sump (125 ILS)

125-series-inline-sump Cut the hole for the outlet with a hole saw and if required seal the gap between the hole and outlet pipe with:

  • Silicon Sealant
  • Denso Tape
  • UniSeal™
…prior to the concrete pour.

Installation Guide – Key Measurements

125-series-installation-guide

 

* This diagram is a guide only. Site conditions and application vary therefore if in doubt please consult a registered engineer

Data Sheets

125-series-spel-thundaflo-data-sheet_Page_1 125-series-spel-thundaflo-data-sheet_Page_1

Thundaflo - 200 Series

Diagrams & Specifications

Thundaflo 200 Series

  1. Maximum design flow rates are theoretical minimums using Mannings n=0.012 with 30mm freeboard below grating.
  2. Zero Fall Sections are used where surface slope exists or to extend drain length.
  3. Channel sections can be custom designed (% fall, length) to suit site specific conditions.
    (additional lead time is required)
  4. Overall drain length can be cut to size to less that 0.5m multiples if required, extra charges will apply.

  1. Maximum design flow rates are theoretical minimums using
  2. Mannings n=0.012 with 30mm freeboard below grating.
    Zero Fall Sections are used where surface slope exists or to extend drain length.
  3. Channel sections can be custom designed (% fall, length) to suit site specific conditions.
    (additional lead time is required)
  4. Overall drain length can be cut to size to less that 0.5m multiples if required, extra charges will apply.

  1. Maximum design flow rates are theoretical minimums using Mannings n=0.012 with 30mm freeboard below grating.
  2. Zero Fall Sections are used where surface slope exists or to extend drain length.
  3. Channel sections can be custom designed (% fall, length) to suit site specific conditiions.
    (additional lead time is required)
  4. Overall drain length can be cut to size to less that 0.5m multiples if required, extra charges will apply.

  1. Maximum design flow rates are theoretical minimums using Mannings n=0.012 with 30mm freeboard below grating.
  2. Zero Fall Sections are used where surface slope exists or to extend drain length.
  3. Channel sections can be custom designed (% fall, length) to suit site specific conditiions.
    (additional lead time is required)
  4. Overall drain length can be cut to size to less that 0.5m multiples if required, extra charges will apply.

Gratings

SPEL Thundaflo 200

 

 

 

 

 

 

Inline Sump (200 ILS)

 

Cut the hole for the outlet with a hole saw and if required seal the gap between the hole and outlet pipe with:

 

  • Silicon Sealant
  • Denso Tape
  • UniSeal™

…prior to the concrete pour.

Installation Guide – Key Measurements

* This diagram is a guide only. Site conditions and application vary therefore if in doubt please consult a registered engineer

Data Sheets

Thundaflo - 200 Series

Diagrams & Specifications

Thundaflo 200 Series

  1. Maximum design flow rates are theoretical minimums using Mannings n=0.012 with 30mm freeboard below grating.
  2. Zero Fall Sections are used where surface slope exists or to extend drain length.
  3. Channel sections can be custom designed (% fall, length) to suit site specific conditions.
    (additional lead time is required)
  4. Overall drain length can be cut to size to less that 0.5m multiples if required, extra charges will apply.

  1. Maximum design flow rates are theoretical minimums using
  2. Mannings n=0.012 with 30mm freeboard below grating.
    Zero Fall Sections are used where surface slope exists or to extend drain length.
  3. Channel sections can be custom designed (% fall, length) to suit site specific conditions.
    (additional lead time is required)
  4. Overall drain length can be cut to size to less that 0.5m multiples if required, extra charges will apply.

  1. Maximum design flow rates are theoretical minimums using Mannings n=0.012 with 30mm freeboard below grating.
  2. Zero Fall Sections are used where surface slope exists or to extend drain length.
  3. Channel sections can be custom designed (% fall, length) to suit site specific conditiions.
    (additional lead time is required)
  4. Overall drain length can be cut to size to less that 0.5m multiples if required, extra charges will apply.

  1. Maximum design flow rates are theoretical minimums using Mannings n=0.012 with 30mm freeboard below grating.
  2. Zero Fall Sections are used where surface slope exists or to extend drain length.
  3. Channel sections can be custom designed (% fall, length) to suit site specific conditiions.
    (additional lead time is required)
  4. Overall drain length can be cut to size to less that 0.5m multiples if required, extra charges will apply.

Gratings

SPEL Thundaflo 200

 

 

 

 

 

 

Inline Sump (200 ILS)

 

Cut the hole for the outlet with a hole saw and if required seal the gap between the hole and outlet pipe with:

 

  • Silicon Sealant
  • Denso Tape
  • UniSeal™

…prior to the concrete pour.

Installation Guide – Key Measurements

* This diagram is a guide only. Site conditions and application vary therefore if in doubt please consult a registered engineer

Data Sheets

Thundaflo Configuration and Sizes

SPEL Thundaflo

SPEL Thundaflo

 

Thundaflo Unique Robust Design

  • Three Metre Modular Sections
  • Independent Positioning System
  • Grating design to suit application
  • Unique Design Dissapates Loading
  • Unique rugged steel design
  • Variable Built-in-fall & Zero Gradient
  • Heavy Duty Class E400 (AS3996) Grating

Thundaflo Easy Installation

Dig trench and set out reinforcing cage and channel sections

 

SPEL Thundaflo

 

  • Trench is dug and reinforcing steel cage set in position.
  • Channel is laid on top of the reinforcing steel cage.
  • The fibreglass rods are inserting through the brackets and hammered into the ground on an angle – bottom splayed out.
  • The torsion springs are also attached to the fibreglass rods.
  • Note that the top torsion spring is positioned at the top of the fibreglass pole to prevent the fibreglass being splintered while being hammered into the ground.

 

Channel is raised into approximate position

 

 

  • Each three metre section is raised into approximate position.
  • Sections are then connected.
  • Note that as each section is raised the fibreglass poles are placed under tension forming a very rigid structure for the concrete pour.
In position and ready for concrete pour

 

  • The vertical position of the channel can be adjusted very accurately along the fibreglass rods and securely locked into place with the torsion springs.
  • The lower torsion spring holds the channel in place while the upper torsion spring prevents float during the concrete pour.
  • Positioning poles can be easily trimmed with a battery powered grinder if they extend above the height of the channel.
  • Polystyrene is inserted into the top of the channel to prevent the ingress of wet concrete into the channel during the pour.
  • Note that the polystyrene insert can be reused.
One concrete pour with no cold joints

 

  • One concrete pour in two passes/stages.
  • Initial stage up to 50mm above bottom of channel to “haunch” channel and reinforcing steel.
  • Second stage to top of channel. Note that wet concrete can be dumped on top of the polystyrene insert to “mitigate any risk of float” during this process. This is important where ground conditions are soft and/or large section channel is being installed.

 

Finished installation

 

  • Chip seal was used in this project where the concrete reinforcing was leveled to 30mm below the top of the frame. This enables the wheel load to be transferred directly into the concrete surround.
  • Grates are inserted and secured in place with bolt and brace.
  • The tested load rating of this ThundaFlo channel drain is E400 (AS3996), extra heavy duty.

Thundaflo Replacing Damaged Poly-Modular Drain

The broken down poly-modular drain. The key problem is that the drain has parted company with the concrete surround and imploded. It appears that several attempts have been made to resurrect the drain, a very expensive and unsuccessful exercise!

A close up view of the broken poly-modular drain where the walls of the drain have imploded. We observe this problem occurring with many of these types of drains and is the reason SPEL Thundaflo is reinforced with a 5mm thick steel rim.

Breaking out the damaged poly-modular. A saw cut is made down each side of the broken poly-modular drain and then dug out.

The trench is dug to approx 150mm below the channel depth (200mm wide drain) taking into account the built-in-fall. Holes are drilled for the rebar stirrups.

Rebar is inserted into the holes and cemented with epoxy resin.

Rebar is tied to form stirrups. The bottom of the stirrups needs to be about half the distance between the bottom of the channel and the trench bottom. 125mm Width, 60mm from the bottom of the channel & 200mm width, 75mm from the bottom of the channel.

SPEL THUNDAFLO is positioned using the Independent Positioning System (IPS) to adjust the height.

Torsion springs can be attached to the bottom of the fibreglass rod to form a “foot” where soil conditions are unsuitable (either too soft or rocky) for the fibreglass rods to be hammered into the ground.

The fibreglass rods are trimmed to below the surface.

The top torsion spring is engaged to prevent the system from floating during the concrete pour.

Poly is inserted into the frame to prevent the ingress of wet concrete into the channel and assist with screeing.

Fibreglass rod is cut to length and the wedged between the frame and the side of the trench to firmly brace the system. A very flexible and effective method to ensure there is no movement while during the concrete pour.

Start of concrete pour. Note how well the poly insert is preventing the ingress of concrete into the channel. A major hassle to clean if this should occur!

A single concrete pour is made in two stages. The 1st stage is to the bottom of the channel and final stage is to the top. The is to mitigate upward hydraulic pressure and prevent the system from floating.

Wet concrete everywhere… Note how well the poly insert prevents the ingress of concrete into the channel

Finishing off: The poly inserts greatly assist in screeing the concrete.

Poly insert removed; grates are inserted…rock solid for many years

Thundaflo Superior Hydraulics

Thunda-River

SPEL thundaflo

Higher Gradient / Velocities where Flow Rates are Low.

Thunda-Torrent

SPEL thundaflo

Super Steep, High Velocity, and Self Cleaning. This is ideal for short runs, particularly entrance Ways where road debris is an issue.

Length Adjustment

SPEL thundaflo

  • Overall Length (0.5 L/m multiples) is adjusted at the start (R1).
  • Custom lengths < 0.5L/m multiples can be supplied to order

Standard Widths

125 Series: Nominal Width = 125mm

200 Series: Nominal Width = 200mm

300 Series: Nominal Width = 300mm

Quote Request Form

Please take a moment to complete this form and we will be in touch to discuss your options.

In Action

The proof is in the pudding. We invite you to take a moment to review our case studies, projects, videos and images showcasing the SPEL Thundaflo.

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How we can help

Work with our experienced team of engineers and consultants on your next WSUD or stormwater treatment project.

Design assistance, complimentary modelling, installation, and maintenance packages. Contact us for an obligation free quote.

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