|Crank up Towers and General Information
Ham and Industrial Crank-Up/Tilt-Over Towers
Crank up tower are dangerous. The
customer shall take precaution with steel objects around power
lines, digging holes, ought never place objects (especially
human) inside of telescoping towers, and shall read and follow
APPLICATIONS: General communications, amateur radio,
two-way radio, light cellular antennas, citizen band radio,
television, cameras, and environmental monitoring instrument
FINISH: All crank up towers are HOT DIPPED GALVANIZED
after fabrication. They are galvanized in accordance with ATSM
A123. The towers are galvanized, hot-dipped, after fabrication
in molten zinc so that tube legs are zinc coated inside the
tubes as well as outside and completely covering all the steel
tower. Drain holes shall be kept clear.
MATERIAL: The towers are made of ASTM-36 structural
shapes, ASTM A513 Tubing, ASTM A53 Grade B pipe. Hardware is hot
dipped galvanized or Stainless Steel. No plated hardware is
WELDING: Welding is done in accordance with AWS D1.1
the latest Revision. Welding rod and gas are selected to insure
the highest ductility and to insure embrittlement does not
accord during the galvanizing process. Certified AWS welders are
used and they certification kept on file.
DESIGN AND ENGINEERING
The crank up towers meets the American Institute of
Steel Construction standards for steel structures. The concrete
design meets the American Institute of Concrete requirement for concrete
and reinforcement. The tower design meets the 1997 Uniformed
Building Code as stated in the calculations.
Karl Tashjian is a licensed Registered Civil Engineer.
PROJECTED AREAS FOR ANTENNAS
Wind loading is dependent on the wind loading
characteristics of whatever is installed on the tower (antennas, lights,
instruments, etc.), concrete base size, type of concrete, soil
conditions at the base of the tower which can vary due to weather
conditions (wet, dry, frozen) and type of soil (sandy, rocky, loam,
etc.). Also, maximum expected sustained winds and wind gusts, and icing
probabilities The foregoing factors should be considered when installing
equipment on the tower.
Crank Up Towers Product
Click on Model
names or Icons below for more information.