The LaserLINE Manufacturing B-LT is a precision-machined direct elevation rod bracket engineered specifically for mounting the Spectra Precision HR320 laser receiver on grade rods used in direct elevation applications. Built for contractors who demand repeatable accuracy at every grade check, the B-LT eliminates the measurement drift and instability that plague improvised or generic mounting solutions. Whether you are setting finish grade, checking subbase elevations, or controlling drainage slopes, the B-LT keeps your HR320 firmly registered to the rod graduations so every reading counts.
Overview & Jobsite Applications
Direct elevation rod work demands that your receiver stays locked in perfect alignment with the rod's graduation markings — any slop or offset in the mount introduces cumulative error that shows up in your finished grade. The B-LT is machined to tight tolerances so the HR320 detects the laser plane at a known, repeatable height above the rod face. The bracket clamps securely without marring the rod, and the low-profile design keeps the setup stable even on windy sites or rough terrain. Contractors working in site development, utility trenching, agricultural grading, and road construction rely on the B-LT to turn the HR320 into a fully integrated direct-read elevation tool rather than a receiver simply strapped to a pole.
Key Specifications
- Compatible Receiver: Spectra Precision HR320
- Application: Direct elevation grade rods
- Construction: Precision-machined bracket, durable finish
- Mount Style: Direct elevation (receiver center referenced to rod graduation)
- Manufacturer: LaserLINE Manufacturing
- Part Number: B-LT
Key Features
- Machined to tight tolerances for repeatable, error-free receiver positioning on the rod
- Secure clamping mechanism holds the HR320 firmly without damaging rod graduations or surface
- Low-profile, balanced design reduces wind-induced rod tip and maintains plumb more easily
- Designed exclusively for the HR320 — no adapters or shimming required
- Durable construction stands up to daily jobsite handling, UV exposure, and weather
- Quick on/off attachment lets crews move the receiver between rods without downtime
- Eliminates offset math — receiver center reads directly to rod graduation for instant elevation confirmation
Job Applications
Finish Grade Verification: Set your rotating laser, place the B-LT-equipped rod at finished subgrade or top-of-base stations, and confirm elevations quickly without manual offset calculations or crew miscommunication.
Utility Trench Invert Control: Maintain consistent pipe invert grades by reading direct elevations at each manhole or cleanout location — the B-LT keeps the HR320 indexed to the rod so your readings translate directly to invert depth.
Drainage & Slope Work: Agricultural land leveling and site drainage design require frequent grade rod checks across long runs. The secure mount ensures the receiver does not shift between stations, keeping your slope data consistent from start to finish.
Road Base & Subbase Compaction Control: During lift compaction, crews need to verify layer thickness and elevation repeatedly. The B-LT allows fast rod placement and immediate elevation readout, keeping the compaction operation moving without grade-check bottlenecks.
Compatible Accessories
- Spectra Precision HR320 Laser Receiver
- Direct Elevation Grade Rods
- LaserLINE Rod Clamps & Accessories
- Spectra Precision HB600 Receiver Bracket
- Rotating Laser Levels Compatible with HR320
Related Guides
- How to Use a Direct Elevation Rod Bracket for Grade Control
- Spectra HR320 Setup & Calibration Guide
- Choosing the Right Laser Receiver Mount for Your Rod Type
- Grade Rod Best Practices for Site Development Crews
Frequently Asked Questions
- Will the B-LT work with laser receivers other than the Spectra HR320?
- The B-LT is machined specifically to the mounting geometry of the Spectra Precision HR320. It is not designed or verified to fit other receiver models. Using it with a different receiver could result in an insecure mount or incorrect elevation offset, compromising your grade accuracy.
- Does the B-LT add any elevation offset I need to account for in my readings?
- The B-LT is designed as a direct elevation bracket, meaning the HR320's detection center is referenced directly to the rod graduation when properly installed. This eliminates manual offset calculations, so the elevation you read on the rod is the elevation at grade — no additional math required.
- Can the B-LT damage my grade rod's markings or surface during use?
- The clamping mechanism on the B-LT is designed to grip the rod securely without gouging or marring the graduation markings or rod face. For best results, ensure the rod surface is clean and free of debris before attaching the bracket, and avoid overtightening the clamp beyond hand-firm.
- Is the B-LT suitable for wet or muddy jobsite conditions?
- Yes. The B-LT is built with durable materials and a weather-resistant finish appropriate for typical outdoor construction environments including rain, mud, and UV exposure. Rinse the bracket with clean water after use in heavy mud conditions to maintain the clamping mechanism and extend the bracket's service life.
Frequently Asked Questions
Will the B-LT work with laser receivers other than the Spectra HR320?
The B-LT is machined specifically to the mounting geometry of the Spectra Precision HR320. It is not designed or verified to fit other receiver models. Using it with a different receiver could result in an insecure mount or incorrect elevation offset, compromising your grade accuracy.
Does the B-LT add any elevation offset I need to account for in my readings?
The B-LT is designed as a direct elevation bracket, meaning the HR320's detection center is referenced directly to the rod graduation when properly installed. This eliminates manual offset calculations, so the elevation you read on the rod is the elevation at grade — no additional math required.
Can the B-LT damage my grade rod's markings or surface during use?
The clamping mechanism on the B-LT is designed to grip the rod securely without gouging or marring the graduation markings or rod face. For best results, ensure the rod surface is clean and free of debris before attaching the bracket, and avoid overtightening the clamp beyond hand-firm.
Is the B-LT suitable for wet or muddy jobsite conditions?
Yes. The B-LT is built with durable materials and a weather-resistant finish appropriate for typical outdoor construction environments including rain, mud, and UV exposure. Rinse the bracket with clean water after use in heavy mud conditions to maintain the clamping mechanism and extend the bracket's service life.