Free StandingInterception Air RodsInterception air rods |
Introductionwww.furse.comIntroductionFree standinginterception air
rods maximum protection,minimum effortThe new Furse interception
air rods are designed to provide afast and easy solution to
protecting rooftop installations, likeair conditioning units or
solar panels, from a direct lightningstrike, all in accordance with
IEC/BS EN 62305:2006. Offering a choice of copper, aluminium or
stainless steel withaluminium tip, these free standing interception
air rods use concreteblocks to secure them to the roof surface,
minimising the time andeffort needed by the installer.Rod height
and wind loading are the important factors when choosing an
appropriate interception air rod. Wind loading becomesmore relevant
for taller interception air rods (3 m and above), whereselection is
by wind zone.This publication provides all the key information and
guidancenecessary to assist with selection of the right free
standinginterception air rod for the task ensuring maximum
protectionagainst lightning, with minimum effort.For product
introduction see page 3For product selection see pages 4 & 5For
individual component listing see pages 6 & 72Interception
tipBase frameConcrete baseInterception
polewww.furse.comIntroduction | Interception air rodsIntroduction3G
Protects rooftop mounted equipment from directlightning strikesG
Complies with IEC/BS EN 62305 standardG Lightweight constructionG
Corrosion resistantG Quick and easy to assembleG Available in a
range of heights from 0.5 m to 10 mG Range of frames and concrete
weights fordifferent wind zonesG Large protection zonesG Modular,
versatile and robustFeatures & benefitsProduct optionsFurse
free standing interception air rods are easily constructed from a
small range of componentsincluding interception pole, support frame
and concrete bases to provide a highly versatile and
effectivelightning protection solution.The straightforward design
of this multi-component system enables rapid installation of
interception air rods toprotect rooftop and exposed equipment from
lightning damage.Interception air rod (3 m to 4 m height)G 2 piece
interception poleG Square support frameG 4 square concretebases (or
8 double-stacked for higherwind speeds)G Select by rod heightand
wind zoneInterception air rod (4.5 m to 5.5 m height)G 2 piece
interception poleG Tripod support frameG 3 circular concrete basesG
Select by rod heightand wind zoneInterception air rod (6 m to 8 m
height)G 3 piece interception poleG Tripod support frameG 6
circular concrete basesG Select by rod height andwind
zoneInterception air rod (8 m to 10 m height)G 3 piece interception
poleG H shaped support frameG 10 circular concrete basesG Select by
rod height andwind zoneInterception air rod (0.5 m to 2 m height)G
Copper or aluminiumair rodG Circular concrete baseG Rod connects
directlyinto baseG Suitable for windzones 1 4Interception air rods
| Product selectionwww.furse.com4Product selectionHeight
ofinterception air rodabove referenceplane (m)LPS Class IV LPS
Class III LPS Class II LPS Class
IAngle(deg)Radius(m)Angle(deg)Radius(m)Angle(deg)Radius(m)Angle(deg)Radius(m)0.5
78.7 2.5 76.3 2.0 73.2 1.7 70.0 1.41 78.7 5.0 76.3 4.1 73.2 3.3
70.0 2.71.5 78.7 7.5 76.3 6.1 73.2 5.0 70.0 4.12 78.7 10.0 76.3 8.2
73.2 6.6 70.0 5.53 76.7 12.7 74.1 10.5 70.1 8.3 66.3 6.84 74.7 14.6
72.0 12.3 67.1 9.5 62.6 7.75 72.8 16.1 69.9 13.6 64.4 10.4 59.1
8.46 71.0 17.4 67.9 14.8 62.0 11.3 55.9 8.97 69.3 18.5 66.0 15.7
59.7 12.0 53.0 9.38 67.7 19.5 64.3 16.6 57.6 12.6 50.2 9.69 66.2
20.4 62.6 17.4 55.6 13.2 47.7 9.910 64.7 21.2 61.1 18.1 53.8 13.6
45.2 10.1Protective angle to protection radius comparison table:Use
this table to calculate the minimum air rod height required to
protect
equipment.LiverpoolManchesterSheffieldKingston-upon-HullStoke-on-TrentBirminghamAberystwythSwanseaNewportOxfordBristolBrightonPlymouthLondonNorwichIpswichOrkneyIslandsThursoInvernessAberdeenFort
WilliamDundeeGlasgowEdinburghNewcastleYorkLeedsOuterHebrides
ShetlandIslands Determining the correct interception air rod for a
particular installation is straightforward.Firstly, establish the
interception air rod heightrequired to create a protective zone
around the equipment. The diagram and table below give guidance on
minimum interception air rod heights toprotect equipment, for the
respective Classes of Lightning Protection Systems (LPS), asdefined
within IEC/BS EN 62305:2006. This isrelevant for all interception
air rods from 0.5 m upwards.Secondly, consider the wind loading at
theinstallation. Wind loading becomes animportant factor for taller
interception air rods,since extreme weather can subject them
tofatigue mechanisms.The map featured right establishes four
windzones for the UK, as highlighted by the wind zones
key.Protective angle diagramThe interception air rod must have
sufficientheight to provide a clear zone of protectionaround the
equipment to be protected, asillustrated below.Wind zones key:Zone
1Windspeed
