Plumb bob uses12/16/2023 The pegs should be driven vertically into the soil and the top should be clearly visible. The size of the pegs (40 to 60 cm) depends on the type of survey work they are used for and the type of soil they have to be driven in. Pegs are generally made of wood sometimes pieces of tree-branches, properly sharpened, are good enough. 8) are used when certain points on the field require more permanent marking. If possible, wooden ranging poles are reinforced at the bottom end by metal points. Ranging poles are usually painted with alternate red-white or black-white bands. REMEMBER: Ranging poles may never be curved. Ranging poles can also be home made from strong straight bamboo or tree branches. Ranging poles are straight round stalks, 3 to 4 cm thick and about 2 m long. They are also used to mark points which must be seen from a distance, in which case a flag may be attached to improve the visibility. 7) are used to mark areas and to set out straight lines on the field. 6 Using a carpenter level 1.5 Ranging Poles Only when the carpenter level is horizontal (or vertical) is the air bubble exactly between these two marks (see Fig. The remaining space is air, visible as a bubble (see Fig. 5).Įach tube is sealed and partially filled with a liquid (water, oil or paraffin). Within a carpenter level there are one or more curved glass tubes, called level tubes (see Fig. When the plumb bob is hanging free and not moving, the cord is vertical.Ī carpenter level is used to check if objects are horizontal or vertical. A plumb bob consists of a piece of metal (called a bob) pointing downwards, which is attached to a cord (see Fig. The rod is usually marked in the same way as a measuring tape, indicating centimetres, decimetres and metres.Ī plumb bob is used to check if objects are vertical. 3) is a straight lath with a length varying from 2 m to 5 m. Whats in the box UnitInstruction Guide Compare with similar items Product Description Product Description Plumb Bob 8oz Brass This Stanley Brass Plumb Bob comes in an 8-ounce design and is ideal for use in framing, deck building, plumbing, transit location and construction applications. ![]() 34V 4 Inch with original Box 40.99 0 bids 6.99 shipping Ended or Best Offer K973- Antique Stanley No 93 Brass Bound Mahogany Carpenter Level 26 Fine 6.50 2 bids 16. 2 A measuring tape 1.2 Measuring RodĪ measuring rod (see Fig. Plumb Bob Antique Carpenter Tool 12oz 9.99 1 bid 12.55 shipping 2d 6h Stanley Vintage Machinists Ground Glasses level NO. Centimetres, decimetres and metres are usually indicated on the tape.įig. They are available in lengths of 20, 30 and 50 m. 2) are made of steel, coated linen, or synthetic material. Usually, a chain has a total length of 20 metres, including one handle at each end. Sometimes a special joint or a tally marker is attached every 5 metres. 1) is made up of connected steel segments, or links, which each measure 20 cm. Many modern plumb-bobs have a reel contained inside a box that has extra functions like a magnetic strip and pin to make your job easier.Chains or tapes are used to measure distances on the field.Ī chain (see Fig. Some plumb-bobs have a reel built-in to the body of the plumb bob for ease of use. A traditional reel is often just a simple spool. Some plumb-bobs are supplied with a reel so that you can wind the string up when you’re finished with it. Some models of plumb-bob have a ring attachment to which the string is tied. This set-up allows the string to protrude directly from the centre of the weight, helping with balance and accuracy. ![]() Some plumb-bobs have a threaded cap that can be unscrewed from the body and through which you feed the string, knot it and then reattach the cap. Many plumb-bobs will simply have a hole in the top of the weight through which the string is looped and tied.īuy this Monument 247X Brass Plumb Bob 71g The hole in a plumb-bob for the string to be fed through and tied may just be a simple hole, it may have a ring attachment, or a removable threaded cap which allows the string to protrude directly from the centre of the weight for greater accuracy and balance. The laws of gravity will ensure that the string is vertical (plumb) and perpendicular to the level (horizontal) ground. The string is a simple piece of thin cord which is attached to a stationary object or construction and from which the plumb-bob weight is suspended. Some models of plumb-bob come with a cap to protect the tip of the weight when the tool is not in use. The finer the point on your plumb-bob, the easier it will be to mark with accuracy. Most plumb-bobs have a pointed end so as to make it easier to align the tip accurately with a marker on the ground. At the opposite end there is a hole for the string to be fed through and tied. The weight is symmetrical for balance, and typically has a pointed end for accurate alignment. The weight or “bob” is the part of the plumb-bob that is suspended by the string.
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