Lightning Protection System - procedure for the installation of lightning protection
system can be done as follow: After receiving the approval drawings, install conduits
from column form work to landscaping area passed the walkway during ground beam and
column concrete pouring by civil contractor. At ground level, conduit will be extended
further to avoid walkway concrete pouring. End of conduit shall be temporary plugged
and marked for further identification. The vertical run of conduit will be extended up
along with column pouring progress. This conduit will be stopped at the utmost floor or
roof slab and temporary plugged until further installation procedure can begin.
When landscaping works are nearly completed, the ground rod will be driven into ground
using appropriated hammer. (location was marked earlier) The rod shall be driven 10 cm
deeper than the finished ground level. Area will be excavated wider so cable from rod to
test box can be pulled and welded easily. Hold cable firms to rod and cover with mold,
then pour the powder into the mold. Note, both surfaces must be treated before cadweld
powder can be poured. Activate the cadweld procedure (exothermic welding) bignited
the powder. Leave the mold to cool down, then remove molding and check the welding
connection. The molecular bonds will be formed between cable and rod producing no
risks of corrosion, rust, and loosen with age. For one-rod system, the ground resistance
must be measured to obtain the requirements. For two or more rods system, cad welding
between rods must be made and measured before connection to test box. On metal sheet,
roof level, saddles or properly clamps will be installed at the utmost top of the roof and
according to the detailed drawings approved by consultant. Then proceed by the
installation of copper tape throughout the roof structures. Copper tape loop should be
checked for their continuity after they are installed. Pull down conductor cables from test
box to roof copper tape loop. Connect bottom end to test box and top end with the loop.