Bolt body material and accessories

Anchor rods are often made of round steel, construction rebar and steel, sometimes with wire rope, fiberglass or wood. Generally, the steel used for the anchor and the bearing capacity of various rods.
The wood has low strength, a tensile strength of about 78MPA, a
compressive strength of about 39MPA, and a 35mm diameter wood rod with a breaking strength of about 70~80KN .
Due to the high price of FRP, FRP anchors have not been used in production.
The pallet is an important component of the bolt. Even the mortar anchor should pay attention to the pallet. The shape of the pallet is commonly used. Among them, the
type 4 pallet has the best effect and typical size.
Of dry rod
drill φ less, [alpha] takes 100 ~ 150, d taken 20, s taken 6; for anchor rod is φ20 ~ 24, whichever is 1% * "**" take "&, #!! Take ( in mm).
Rock conditions lot difference, sometimes joist, or metal mesh with a series, and the joists with a drill, or a metal mesh anchored in series with a tightly onto the rock surface, available wooden joists, channel,
beam 4 Or strip steel ( about 100mm wide ), even processed into arches, and a series of slotted holes are drilled through the long axis at a certain distance for the anchor to pass through. The series belt can be laid in parallel with two φ10 disc bars or steel wire ropes around the anchor rod, and clamped at a certain distance with a clamp. Metal is commonly used φ4~10mm   The wire is braided and the mesh size is 150*150~250*250mm.

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