TrenchFormer MHD

Forming Systems Designed for Industrial Applications and Roadways

Any special flow and depth requirements can be achieved with MHD. All of our patented TrenchFormer forming systems deliver greater flexibility for challenging specifications and projects. An ASTM A-36 structural steel frame maximizes load transference into the encasement concrete. And, the attractive grate designs are lighter weight for ease of maintenance and greater inflow area with no sacrifice in strength.

TrenchFormer MHD provides a complete assembly of parts needed to handle medium to heavy-duty applications found in municipalities, roadways, and industrial facilities.

TrenchFormer-MHD
U-Leg Adjustable Clamp Anchor Studs EPS Former Deforming Groove Alignment Slot Cross Ties Structural Rail Color Coded Labels Pin Lock Retention System MHD Grate System

U-Leg

No-float U-Legs eliminate subgrade barrier penetration common with most competitors systems and the concrete anchoring slab holds the forming system firmly in place.

Adjustable Clamp

The adjustable clamp allows the formwork to be micro-adjusted once the anchoring slab is poured over the bottom of the u-legs and prevents uneven joints.

Anchor Studs

Welded concrete studs independently anchor the frame into the surrounding concrete delivering structural load transfer and maximum service life.

EPS Former

Expanded Polystyrene formers can be cut with any desired custom slope and are used to create our standard radius bottom TFX systems, or any custom shape, cast-in-place concrete trench.

Deforming Groove

The center V-shaped section aids installation alignment with the adjoining former sections.  After concrete placement, the deforming "V" will break free and enables easy deconstruction of the trench.

Alignment Slot

The top channel recess is designed to allow the insertion of a standard 2x4 for additional support when linear alignment is critical.

Cross Ties

Metal cross ties hold structural steel rails tight to the foam former for consistent horizontal spacing.

Structural Rail

Most manufacturers use sheet metal overlay rails.  Our structural steel angle is independently anchored to maximize load transference into the encasement concrete.

Color Coded Labels

Color-coded labels allow easy matching with other system components.

Pin Lock Retention System

Our patented four-point pin lock system provides longitudinal and vertical grate retention designed specifically to resist dynamic loading. The non-rigid system also eliminates thermal-induced stresses that traditionally cause concrete and bolt failures in frame and cover systems. 

MHD Grate System

The advanced American-made ductile iron grate design yields faster inflow rates without any sacrifice in strength and less weight for ease of handling and installation. 

MHD- POST-CONSTRUCTION INSPECTABILITY

WHAT HDPE AND FIBERGLASS SYSTEMS HIDE

Concrete consolidation under the rail is vital to the longevity of any system in service under heavy loading.  Fiberglass and HDPE linear systems can hide construction defects, which can cause costly downtime and ultimately complete system failure.


TrenchFormer MHD

Bus ExampleMHD 8″, 12″ or 18″ advanced grate design is not only attractive, but it also provides strength and performance. MHD grates provide the largest inflow area available in cast grates for 8, 12, and 18 inch trenches. While still lightweight, they far exceed all AASHTO load ratings.

MHD’s patented system utilizes two removable stainless steel pins plus two fixed pins for every two grates providing both longitudinal and vertical grate retention. An average of only one pin must be removed per grate for easy construction and trench maintenance. Additionally, this system eliminates concrete cracking from tensile stress by constrained thermal expansion and contraction that is often found in rigid four-bolt systems.

MDH grate jointMHD does not utilize dissimilar materials (plastic, fiberglass, etc.) between the rails and concrete thus avoiding the potential for failure due to thermal expansion and contraction.

The system can be configured for the applications special flow and depth requirements. A large range of trench depths, slopes and configurations provides the Engineer with greater flexibility for challenging projects. Additionally, the system is pre-engineered and factory fabricated reducing the potential for construction errors in the field.

MHD is available in both a roadway and airport configurations. The roadway configuration maximizes the trench width thus providing optimal hydraulic capacity. MHD-A maximizes the bearing area and is intended for regional or municipal airports.

 

 

 

 

 

 

MHD System Drawings-Details-Specifications

MHD

Standard Roadway Configuration

Description Catalog Details Sheet (.dwg) Specification
MHD 8″

Epoxy Coated Frame

MHD 8″

Galvanized Frame

MHD 8″

Galvanized Frame & Grate

MHD 8″ – Heelproof

Epoxy Coated Frame

MHD 8″ – Heelproof

Galvanized Frame

MHD 8″ – Heelproof

Galvanized Frame & Grate

MHD 12″

Epoxy Coated Frame

MHD 12″

Galvanized Frame

MHD 12″

Galvanized Frame & Grate

MHD 18″

Epoxy Coated Frame

MHD 18″

Galvanized Frame

MHD 18″

Galvanized Frame & Grate

 

 

MHD-A

Municipal / Regional Airport Configuration (100,000lbs)

Description Catalog Details Sheet (.dwg) Specification
MHD-A 8″

Epoxy Coated Frame

MHD-A 8″

Galvanized Frame

MHD-A 8″

Galvanized Frame & Grate

MHD-A 12″

Epoxy Coated Frame

MHD-A 12″

Galvanized Frame

MHD-A 12″

Galvanized Frame & Grate