Sunday, March 19, 2006

Tower structure - weight estimates

The following sizes/numbers are for estimation purposes only - primarily as notes for me. The weight limit is 50,000 lbs per container, possibly a bit less. I need to find out road weight limits for China from the port to Beijing, then the road from Beijing to Shanghai.

Towers:
20' 5' dia bottom section (6000#) with 6 x 6 x 1.5" base (2400#) = 8400# per base
40' 4' mid section (9600#)
40' 3' top section(7200#)
25,200# (11,000 kg) per tower - 2 containers required minimum
towers sleeve together on ground and are then lifted by crane onto base system

Base Sections:
20 x 20 base structure covered with 1" and .5" plate, filled with sand
4 - 20' x 2' 120# I-beam (3/4" web & flange) = 9600#
4 - 20' x 2' 75# channel (6 x 24 x 5/8") = 6000#
1- 20' x 6' x 1" plate = 4800#
2 - 20' x 7' x 3/8" plate = 4200#
steel - 24,600# - total 2 containers required for 4 base sections.

650 cubic ft. sand = 64,000lbs - will fit in each base
total base weight, sand and steel - each = 88,600#

Cross brace beam sections:
Cross braces join each tower base section. Each brace section consists of 2 20" I-beams approximately 48" apart. Beams are joined at the base to smaller 6x4" junior beams, spaced approx. 10' on center. Beams are joined at the top by 1/4" plate. All cable runs thru these beam channels, joined to cable channels built into the bases. A rail system is mounted on 2 of the sections, permitting tracked deployment of heavy machines during the performance.

2 - 60' x 18" x 6" 40# beams = 4800#
6 - 10' x 4' x .25 plate = 2400#
5 - 5' x 6" x 4" 9# beam = 225#

approx. 7500# per section - 30,000# total
filled to 1' would add approx. 100,000 to the base system weight, for a total system weight of 500,000#.

Weight with towers and base system would be approx. 600,000#

Total steel weight is approximately 230,000# - 5 containers minimum.

Extra space in containers will be used for aluminum truss, softgoods and other high volume, low weight items.

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