Description
8′ x 12′ ESC TSB4 Steel Trench Box
The ESC TSB4-812 is a compact steel utility trench shield built for localized utility excavations where an 8-foot shield height is needed but a longer mainline trench box would be unnecessarily difficult to transport, position, or reposition.
Its 12-foot length provides more working room than the 8×10 configuration while maintaining a compact footprint for utility tie-ins, vault installations, bore pits, spot repairs, and other concentrated excavation work in streets, easements, and congested jobsites.
The TSB4-812 is a standard open-ended trench shield. It should not be confused with a purpose-built manhole shield, which may have different end-wall, corner, and clearance configurations.
Key Benefits & Crew Efficiency
- Compact Utility Configuration: The 12-foot length provides useful working room for localized utility installations without the size and handling requirements of a longer mainline box.
- Versatile Utility Applications: Well suited for utility tie-ins, service connections, vault installations, bore pits, spot repairs, and other concentrated excavation work.
- Internal Working Clearance: The TSB4-812 provides 60 inches of pipe clearance and 9′11″ of clear length between spreaders.
- Strong Depth Capability: Built with a 1,780 PSF shield capacity and maximum depth ratings of 32′ in C60 soil and 25′ in C80 soil.
- 4-Inch-Wall Steel Construction: Weighing approximately 5,627 lbs without spreaders, the TSB4-812 balances an 8-foot shield height with the mobility needed for everyday utility construction.
Product Specifications
| Model | TSB4-812 |
|---|---|
| Dimensions | 8′ High x 12′ Long |
| Wall Thickness | 4 Inches |
| Material | Steel |
| Weight | Approx. 5,627 lbs |
| Pipe Clearance | 60 Inches |
| Length Between Spreaders | 9′11″ |
| Shield Capacity | 1,780 PSF |
| Max Depth Rating – B45 | 40 ft |
| Max Depth Rating – C60 | 32 ft |
| Max Depth Rating – C80 | 25 ft |
Pricing & Logistics
Price: $14,115.00
Contact us to confirm current pricing, availability and shipping rates.
Freight & Delivery Coordination
Shipping rates are calculated based on equipment quantity, spreader configuration, and your final jobsite or yard destination. Discounts may be available for multiple box orders or complete fleet packages.
Target Applications
The 8′ x 12′ TSB4 is designed for contractors performing localized utility installation, maintenance, repair, and structure work where an 8-foot shield height is required within a manageable footprint.
Typical applications include:
- precast manhole installation where the structure dimensions and shield clearances are compatible;
- valve and meter vault installation;
- utility tie-ins, tees, crosses, and service connections;
- bore pits and receiving pits;
- spot repairs to water, sewer, gas, electrical, and telecommunications lines;
- localized utility exposure and maintenance;
- roadway and municipal utility work;
- utility excavations in streets, easements, and congested jobsites.
The 12-foot length gives crews additional working room for utility components, connections, and installation activities while remaining easier to handle than a 16-foot or 20-foot mainline trench box.
Suitability depends on the dimensions of the pipe, structure, vault, or utility component being installed. The working clearances of the assembled trench box should be verified before equipment is selected.
Critical Selection & Safety Factors
Is the 8×12 TSB4 Right for Your Jobsite?
Trench box selection involves more than choosing a height and length.
The correct shield depends on excavation depth, trench width, pipe or structure dimensions, soil classification, surcharge conditions, groundwater, adjacent structures, excavator capacity, transportation requirements, and jobsite access.
The 8×12 TSB4 is worth considering when the excavation requires an 8-foot-high shield and more working room than an 8×10 box, but does not require the length, weight, or handling demands of an 8×16 or 8×20 mainline shield.
Although the TSB4-812 may be suitable for some precast manhole and vault installations, it is a standard open-ended trench shield rather than a dedicated manhole box. Verify that the dimensions and configuration provide the required clearance for the structure, rigging, installation method, and crew.
For smaller spot excavations or severely restricted jobsites, the 8×10 TSB4 may be a better fit. For longer pipe installations or projects requiring more longitudinal working room, an 8×16 or 8×20 configuration may be more appropriate.
We can help you compare trench box sizes and configurations based on your excavation requirements, utility component dimensions, equipment, transportation needs, and preferred working clearances.
Depth Ratings & Tabulated Data
The listed depth ratings must be evaluated together with the applicable manufacturer tabulated data and actual jobsite conditions.
The Competent Person is responsible for evaluating excavation conditions, determining the applicable soil classification, accounting for surcharge loads and adjacent structures, and selecting and using the protective system accordingly.
Groundwater, excavation geometry, spoil pile placement, heavy equipment near the excavation, and other site-specific conditions must also be considered.
The dimensions of the pipe, structure, vault, or utility component must be evaluated to confirm that it can be installed within the available pipe clearance, spreader spacing, and working area of the shield.
For help comparing available trench box options, contact our team with your project details and equipment requirements.
Spreader Configurations
The correct spreader configuration depends on the required trench width, pipe or structure dimensions, installation method, and the amount of working clearance needed inside the trench box.
When requesting a quote, send us the project information needed to evaluate available configuration options, including:
- excavation depth;
- soil classification;
- required trench width;
- pipe, structure, or utility component dimensions;
- required working clearance;
- project location;
- quantity of trench boxes required.
We can help with spreader options, current availability, equipment quotes, and freight and delivery coordination.
Request a Quote from Iron Lot
Iron Lot supplies trench boxes and trench safety equipment to underground
utility contractors, excavation contractors, pipeline contractors,
municipalities, public works departments, and other construction equipment
buyers.
Contact our team for:
- current pricing and availability;
- spreader options;
- stacking pins and stacked configuration requirements;
- multiple-unit quotes;
- freight and delivery coordination;
- comparison with other ESC TSB4 sizes;
- steel and aluminum trench box options;
- equipment financing information.
Payment Options:
We accept company check, wire transfer, ACH, and credit card payments. We also offer financing through Ascentium Capital.
Financing: Ascentium Capital offers fast and flexible financing. With their quick and convenient way to purchase equipment, working with Ascentium Capital helps you acquire the funds you need for your equipment purchase. With financing and leasing of up to $2,000,000, Ascentium Capital works with you to make the application process simple and at no obligation.
To learn more about Ascentium Capital and how it can assist you, click image below:
