The hollow cone of the taper 1/75 of the pole is used as the body.
Concrete must have the necessary strength, durability, watertightness and performance to protect steel.
The compressive strength should be more than 49.0 MPa (= N / ㎟) at the end of the prescribed curing.
Aggregates are clean, hard-durable and should not contain harmful amounts of dirt, mud, thin, long, thin, long, thin fragments, organic impurities, chlorides, etc.
with moderate particle size. The maximum size of coarse aggregate should be 25 mm or less.
NOTE Rebars should be placed as evenly as possible in the cross section in the axial direction.
Rebar spacing should be at least 5/4 of the maximum dimension of their coarse aggregate.
Auxiliary rebars are arranged helically outside the main rebar and axial bar.
Molding is performed by adding centrifugal force after adding the proper concrete formulation. At this time, it is assumed that a predetermined tension is applied to the main rebar in advance.
For a 10m concrete pole, the design load is 350kgf and the breaking load is 500kgf.
There are no defects such as harmful scratches or cracks when design load is applied.