SitePro 6.5ft Gammon Reel
SitePro 12 FT Gammon Reel
SitePro Plumb Bob Sheath For 16 & 18 Ounce
SitePro 32OZ Brass Plumb Bob
SitePro 24OZ Brass Plumb Bob
Plumb Bobs and Accessories for Surveying, Construction, and Layout Work
Plumb bobs are simple but essential tools used to establish a true vertical reference point in surveying, construction, carpentry, masonry, and layout applications. Whether you are transferring points, checking vertical alignment, setting control, or working with a surveying tripod and instrument setup, a quality plumb bob helps improve accuracy and consistency in the field.
At SiteSurv USA, our collection of plumb bobs and accessories includes brass plumb bobs, Gammon reels, replacement string, sheaths, and other field-ready accessories selected for professional surveyors, builders, contractors, and construction layout crews.
What Is a Plumb Bob?
A plumb bob is a weighted tool suspended from a string or reel to create a straight vertical line using gravity. This vertical line, often called a plumb line, allows crews to line up a point above or below a reference mark with dependable accuracy.
Plumb bobs are commonly used for setting points, aligning posts or walls, transferring layout marks, checking vertical surfaces, and centering instruments over a known point. They remain a trusted tool because they are accurate, durable, easy to use, and do not require batteries or calibration.
Common Uses for Plumb Bobs in the Field
- Surveying: Used to center instruments, align points, and support accurate field measurements.
- Construction layout: Helpful for transferring points, checking vertical alignment, and laying out structural elements.
- Carpentry and framing: Used to verify straight vertical lines for walls, posts, beams, and openings.
- Masonry and concrete work: Useful for keeping columns, walls, forms, and other vertical structures aligned.
- Instrument setup: Often used alongside surveying equipment, tripods, and other layout tools.
Choosing the Right Plumb Bob
Plumb bobs are available in different weights, materials, and designs. Brass plumb bobs are popular because they are durable, balanced, corrosion-resistant, and easy to spot in the field. Heavier plumb bobs, such as 24 oz or 32 oz models, are useful outdoors or in job site conditions where wind and movement can affect lighter tools.
For many surveyors and contractors, the best choice depends on the type of work being performed. A lighter plumb bob may be convenient for quick interior layout tasks, while a heavier brass plumb bob offers added stability for outdoor surveying, construction layout, and longer plumb line drops.
Plumb Bob Accessories
The right accessories can make your plumb bob easier to carry, protect, and use throughout the workday. Gammon reels are especially popular because they allow for fast plumb line setup, adjustment, and storage. A plumb bob sheath helps protect the point and keeps the tool secure when carried on a belt or in a field bag.
Our plumb bob accessories are designed to support daily field use and pair well with other surveying supplies, including measuring tools, marking supplies, field books, and layout equipment.
Complete Your Surveying and Layout Setup
For a complete field setup, pair your plumb bob with professional surveying tripods, tribrachs and adapters, total stations, and other surveying equipment. These tools work together to help crews maintain accurate alignment, reliable measurements, and efficient workflow on the job site.
Whether you need a precision brass plumb bob, a durable Gammon reel, or a replacement accessory for your existing setup, SiteSurv USA offers dependable plumb bobs and accessories built for professional surveying, construction, and layout work.
