F.A.Q

A trench drain system is a linear surface drainage solution designed to capture and redirect water through a narrow channel covered by a grate. Unlike point drains, trench drains efficiently manage high water volumes across large surface areas, making them ideal for driveways, industrial sites, and commercial properties.

A trench drain system is a linear drainage application that can also be configured in a radius or curve or perimeter with modifications. a trench drain consists of a few different components, including caps, outlets channels, and the covers. There are a few different types of materials and types of components depending on site requirements capacity requirements and load rating requirements.

A cap generally goes on the high side and acts as a closed mechanism for the channel.

A outlet or catch basin generally goes on the high side and acts as the outlet point for discharge.

An outlet can be configured as an end outlet, bottom outlet or side outlet, depending on invert location these can be configured pre-fabricated or fabricated on site as a modification.

The channels are troughs can come pre-sloped or neutral. The troughs can be installed with different methods, including suspension with rebar or set on top of pavers suspension with wood is also acceptable. Some channels are made out of HDPE, polymer, stainless steel and various different high-performance concrete fiber reinforced concrete and polymer concrete are also suitable choices for heavy duty, commercial, rated and municipal rated drainage troughs.  Fiber reinforced concrete and polymer concrete are also suitable choices for heavy duty, commercial, rated and municipal rated drainage troughs. Some channels have anchors for rebar, and some channels are mechanically anchored, and have mechanisms to act as anchors such as mechanical anchors. Additionally, a rebar kit can be used or support brackets.

The cover is known as the GRATE the cover is available in different materials, including ductile iron stainless steel HDPE polymer and galvanized steel among others. The cover choice is dependent on environmental conditions, load rating requirements and site and user requirements. The GRATE can come in a variety of slot orientations depending on capacity requirements and pedestrian walking requirements for example a heel proof great has small pinhole design suitable for high heels of a shoe.

A trench drain works by collecting surface water along its entire length and directing it toward an outlet or stormwater system. The system typically includes:

• A channel (polymer concrete, plastic, or metal)
• A grate (steel, cast iron, or composite)
• A slope or built-in pitch for water flow

This linear design allows for faster water capture and reduced pooling, especially during heavy rainfall.

Trench drains are used in a wide range of applications, including:

• Residential driveways and patios
• Commercial parking lots
• Industrial facilities and warehouses
• Loading docks
• Pool decks and sports facilities

They are essential where surface water management and safety are critical.

Common trench drain materials include:

• Polymer concrete (high strength, corrosion-resistant)
• HDPE / plastic (lightweight, cost-effective)
• Fiberglass (chemical-resistant)
• Steel or stainless steel (durable, hygienic for food industries)

Material selection depends on load requirements, environment, and budget.

Trench drains are classified by load ratings (e.g., per EN 1433 standard):

• A15 – Pedestrian areas
• B125 – Light vehicles
• C250 – Parking lots
• D400 – Roadways and truck traffic
• E600/F900 – Airports and heavy industrial use

Choosing the correct rating ensures structural integrity and safety.

Sizing depends on:

• Drainage area (square footage)
• Rainfall intensity (local climate data)
• Flow rate requirements
• Slope and outlet capacity

Improper sizing can lead to overflow, flooding, or system failure, so hydraulic calculations are often recommended.

• Sloped trench drains have a built-in gradient for efficient water flow
• Neutral trench drains are flat and rely on installation slope

Installation involves:

1. Excavating a trench
2. Preparing a concrete base
3. Setting the channel with proper alignment
4. Securing grates
5. Connecting to drainage outlets

Professional installation ensures proper slope, stability, and longevity.

Proper installation is equally as important as proper product choice. installation is clearly outlined with specific manufacturer instructions and cross-section details that act as a guide. proper planning and execution is critical along with following the recommended manufacturers guidelines. a project can be a simple as a straight line. You’re an a project can be a simple as a straight linear run, which comes either neutral or pre-slope and we can configure the parts easily. On some other projects architects and engineers generally draw out the plans and we supply a layout or configuration suitable for what is trying to be achieved. a shop drawing is a parts configuration along with inverts and elevations that try to match out a drawing that was engineered.

Yes, regular maintenance includes:

• Removing debris from grates
• Flushing the channel
• Inspecting for blockages

Routine maintenance prevents clogs, odors, and reduced efficiency.

This is an interesting question that has a few different parameters. The main considerations for GRATE choice are load class requirements, site requirements and functionality requirements.

For example, we can start with pedestrian use cases. The general main considerations are heel proof and ADA for most pedestrian applications. Heel proof design is suitable for a heel of a shoe and ADA has slots smaller than 1/4 inch Suitable for an ADA application. Load classes range from a through F and are dependent on what vehicles or machinery are going through over the drain.there are also our paw proof grates for kennel applications.

Another consideration would be slot or orientation if you want the grates, vertically slotted horizontally slotted, thin slotted or even solid. Utility trenches generally require a solid grate cover. Some grates are also coated or come unpainted to match different aesthetics and environmental conditions. There are also decorative and polymer crates available in various different colors. When chemicals are a concern stainless steel is generally a good option 304 or 316 dependent on the caustic chemicals annd agents that will be present in that environment. There are various different coatings, such as fuel resistant coatings for airport applications.

Grate selection depends on use:

• Decorative grates – residential aesthetics
• Heavy-duty cast iron – industrial traffic
• Heel-proof grates – pedestrian safety

Grate design impacts both performance and appearance.

To choose the right system, consider:

• Application (residential, commercial, industrial)
• Load requirements
• Drainage capacity
• Material durability
• Budget

Consulting with an engineer or supplier ensures optimal performance and compliance.

Yes, trench drains can be customized in:

• Length and width
• Grate design
• Material
• Load rating

Customization is common in architectural and industrial projects.

Costs vary widely:

• Residential: $30–$200+ per linear foot, simple models to architectural and designer grates
• Commercial/industrial: $100–$500+ per linear foot

Factors include material, load rating, installation complexity, and site conditions.

Trench drains can be ADA compliant if they use:

• Heel-proof grates
• Proper spacing (typically < ½ inch openings)

Compliance is critical for public spaces and commercial properties.

Sizing depends on:

• Drainage area
• Rainfall intensity
• Flow rate (cfs)
• Outlet capacity

Hydraulic calculations are required for accurate design.

A drain with a built-in gradient (typically ~0.5–0.7%) to improve water flow.

A flat-bottom channel that relies on site grading for drainage performance.

• Widths: 1.25” - 52”
• Depths: 1.75” - 36” +

A stable base (often concrete) ensures:

• Structural integrity
• Load distribution
• Proper alignment

They connect via:

• Bottom outlets
• End outlets
• Side outlets

Connected to pipes, storm drains, or retention systems.

Yes, they are commonly integrated into municipal stormwater infrastructure.

Trench drain systems can outlet in a variety of different ways for some residential applications contractors simply take the pipe out to daylight and some applications. The water has to go through a filtration system or a sand separator system or a grease trap interceptor the outlet point can also include a catch basin which acts as a filter and debris mechanism before the water or other liquid gets discharged catch basins can either be in line or square trend strains can tie into the municipal system or other methods can also be used as outlet points, depending on the application.