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. Some are bullet- or cone-shaped, but in the DIY world they're often in the guise of a chalk box or chalk line. That weighted object can be as simple as a rock or as elaborate as the brass plumb bob shown. 5).Įach tube is sealed and partially filled with a liquid (water, oil or paraffin). What is a brass plumb bob used for A plumb bob is a weighted object connected to a string that can be used to establish a vertical line. Within a carpenter level there are one or more curved glass tubes, called level tubes (see Fig.
#Plumb bob cord free#
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.
2 A measuring tape 1.2 Measuring RodĪ measuring rod (see Fig. 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. This item: TAJIMA Plumb Bob Setter - 10 oz (300g) Magnetic Plumb-Rite with 14.5 ft Auto Recoil Cord & Quick-Stabilizing Bob - PZB-300 28.48 Only 3 left in stock - order soon. 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. Suspend the bob and use the cord as a vertical reference line. Plumb Bobs Brass-Plated Steel Remove the cap to connect a cord. Chains or tapes are used to measure distances on the field.Ī chain (see Fig. Plumb Bobs with Cord Reel Use the pin, adjustable hook, or magnet to mount.
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