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Overview

The Seco 98011 SVR Series fiberglass grade rod is engineered for contractors and survey crews requiring precise elevation measurements throughout the workday. At 25 feet with 8ths-inch graduations, it covers standard floor-to-ceiling heights and elevation changes while maintaining portability that aluminum and wood alternatives can't match. This rectangular-profile rod features high-visibility graduations on both faces, allowing readings from multiple positions without repositioning. The fiberglass construction delivers years of reliable performance in moisture-rich environments where metal rods corrode and wooden rods warp, making it the dependable choice for construction layout, foundation verification, grading operations, and topographic surveys where accuracy and durability determine project success.

Seco designed this grade rod specifically for professionals who demand repeatability across varying site conditions. The non-conductive fiberglass body provides essential safety when working near overhead power lines—a critical consideration for utility surveys and roadway projects. At just over 3 pounds fully extended, the 98011 reduces operator fatigue during all-day leveling sessions while the rectangular profile prevents rolling when set down on sloped surfaces. The 8ths-inch graduations strike the optimal balance between precision and readability at distances up to 300 feet with quality optical levels or laser receivers, eliminating the guesswork that comes with estimating between marks on coarser-graduated alternatives.

Key Specifications

• Model Number: Seco 98011
• Extended Length: 25 feet (7.62 meters)
• Collapsed Length: 61 inches (1.55 meters)
• Graduation Scale: 8ths of an inch (0.125")
• Construction Material: Reinforced fiberglass composite
• Profile Shape: Rectangular anti-roll design
• Number of Sections: 5 interlocking segments
• Weight: 3.2 lbs (1.45 kg)
• Faces: Dual-sided graduations for 360° readability
• Graduation Style: Direct elevation reading (cumulative numbering)
• Electric Safety: Non-conductive fiberglass body
• Finish: UV-resistant coating with high-contrast markings
• Temperature Range: -20°F to 160°F operating conditions
• Accuracy Standard: ±1/16" per 25 feet when properly maintained

What's in the Kit

• Seco 98011 25-foot SVR Series Fiberglass Grade Rod with 8ths-inch graduations
• Protective carrying case with shoulder strap and reinforced end caps
• Rod level vial bracket (bubble level for vertical alignment verification)
• Replacement section locking pins (set of 2 spares)
• Quick reference card with reading technique guidelines and maintenance schedule

Job Applications

• Residential Foundation Layout: The 25-foot reach handles typical foundation depths and first-floor heights in single operations, eliminating the measurement errors that accumulate when chaining shorter rods together. The 8ths-inch precision ensures foundation forms meet engineering tolerances before concrete placement, preventing costly rework from elevation discrepancies discovered during framing.
• Site Grading and Excavation Control: Track cut-and-fill elevations across building pads, parking lots, and drainage swales where even minor elevation errors create water management problems. The rectangular profile remains stable on soft subgrade materials, while the fiberglass construction won't bend when used as a temporary depth gauge in trenches—something aluminum rods suffer from repeatedly.
• Utility Corridor Surveys: The non-conductive fiberglass body provides critical operator safety when establishing invert elevations near overhead distribution lines or within substations. Survey crews can work confidently knowing accidental contact won't create electrical pathways, while the corrosion resistance ensures accuracy isn't compromised by moisture in manholes and wet utility vaults.
• Roadway and Parking Lot Construction: Verify subgrade preparation, aggregate base courses, and final asphalt elevations against design profiles with graduations fine enough to catch the half-inch deviations that cause drainage failures and premature pavement deterioration. The dual-face design lets instrument operators and rod holders both confirm readings, reducing communication errors on noisy job sites.
• Topographic Mapping and Boundary Surveys: Establish elevation data points for contour generation and vertical control networks with a rod that extends to full height in seconds. The lightweight design reduces fatigue when collecting hundreds of shots across large properties, while the UV-resistant finish maintains graduation visibility even after years of sun exposure that would fade painted alternatives.
• Agricultural Land Leveling: Design proper field slopes for irrigation efficiency and drainage management with elevation data collected at grid intervals across acreage. The fiberglass construction withstands moisture from irrigated fields and won't corrode from fertilizer exposure, maintaining calibration accuracy season after season where metal rods would deteriorate.

Compatible Accessories

• Seco Magnetic Laser Detector/Receiver: Mounts directly to rod for machine control applications and extends usable range beyond optical instrument capabilities
• Adjustable Rod Bipod Stand: Provides hands-free stability during one-person surveys and self-leveling operations
• Replacement Carrying Case: Heavy-duty nylon with reinforced stitching for crews working from service trucks without enclosed storage
• Rod Level Upgrade Kit: High-precision circular bubble for applications requiring absolute verticality verification
• Reflective Tape Strips: Adhesive-backed prism tape increases visibility in low-light conditions and tunnels
• Extension Section: Add 5-foot increments for specialized applications requiring measurements beyond 25 feet

Related Guides

• Choosing the Right Grade Rod Graduations for Your Survey Work
• Grade Rod Maintenance and Calibration: Ensuring Long-Term Accuracy
• Leveling Equipment Basics: Instruments, Rods, and Tripods Explained
• Construction Site Safety Near Power Lines: Non-Conductive Equipment Requirements

FAQ

What's the difference between 8ths-inch and 10ths-inch graduations for grade rods?

8ths-inch graduations (0.125" intervals) align with standard US construction measurements and architectural dimensions, making mental conversions unnecessary when comparing to plans dimensioned in feet and inches. 10ths-inch graduations (0.10" intervals) simplify decimal calculations for engineering applications but require conversion when coordinating with framing dimensions. For general construction and site work, 8ths provide more intuitive readings that match tape measures and building plans.

Can this fiberglass grade rod be used with rotary laser levels and machine control systems?

Yes, the Seco 98011 works seamlessly with laser receivers and machine control detectors. The rectangular profile includes mounting channels for attaching magnetic or clamp-style laser detectors at any height along the rod. The non-conductive fiberglass won't interfere with laser signal reception, and the dual-face graduations remain visible for visual confirmation of laser-indicated readings during grade-checking operations.

How does fiberglass construction compare to aluminum or wood grade rods for durability?

Fiberglass offers superior longevity in challenging conditions. Unlike aluminum, it won't corrode from concrete exposure, saltwater environments, or chemical contact, and it maintains structural integrity without denting from vehicle strikes or drops. Compared to wood, fiberglass won't absorb moisture that causes warping, swelling, or dimensional changes affecting accuracy. The UV-resistant finish prevents sun degradation that fades graduations on painted alternatives, typically providing 5-7 years of daily professional use while maintaining calibration.

What's the maximum distance this grade rod can be accurately read with a builder's level?

With quality optical instruments (20x-32x magnification builder's or automatic levels), experienced operators can reliably read 8ths-inch graduations at distances up to 250-300 feet under good lighting conditions. Beyond 200 feet, atmospheric conditions and instrument quality become limiting factors. For distances exceeding 300 feet, digital levels with electronic reading capability or total stations provide better accuracy than visual graduation reading, though the rod remains perfectly suitable as a target for these advanced instruments.