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Lighting Columns - Foundations - Guide to Column …

44 Guide TO Column INSTALLATION FOUNDATIONSFOUNDATIONSRoot diameter - For complete Column data information see the Columns section of Columns are supplied for root mounting with a root length (Z, fi gure 1) applicable to the height of the particular most applications, particularly on medium size Columns having large overturning moments, it is recommended that the root is inserted into a prepared foundation (Fig 1).For smaller Columns where the ground conditions are suitable, a prepared foundation is not always necessary (Fig 2). All that is required is a suitably sized excavated hole in undisturbed ground, which is fi lled with concrete after erection of the llingThe standard stipulates the following guidelines to be followed:a) All back-fi lling material is to be placed in 150mm thick layers and be well compactedb) During compaction, care is to be taken to ensure that the corrosion protection system of the Lighting Column is not damagedc) Where the hole is back-fi lled with concrete, the concrete is to extend from the base of the Lighting Column to ground leveld) Where paving or bituminous surfacing is to be applied around the Lighting Column , the top level of the concrete may be lowered by the thickness of this surfacing; and e) A duct with the same dimensions as

44 www.abacuslighting.com GUIDE TO COLUMN INSTALLATION FOUNDATIONS FOUNDATIONS Root diameter - For complete column data information see the columns section of www.abacuslighting.com Abacus columns are supplied for root

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Transcription of Lighting Columns - Foundations - Guide to Column …

1 44 Guide TO Column INSTALLATION FOUNDATIONSFOUNDATIONSRoot diameter - For complete Column data information see the Columns section of Columns are supplied for root mounting with a root length (Z, fi gure 1) applicable to the height of the particular most applications, particularly on medium size Columns having large overturning moments, it is recommended that the root is inserted into a prepared foundation (Fig 1).For smaller Columns where the ground conditions are suitable, a prepared foundation is not always necessary (Fig 2). All that is required is a suitably sized excavated hole in undisturbed ground, which is fi lled with concrete after erection of the llingThe standard stipulates the following guidelines to be followed:a) All back-fi lling material is to be placed in 150mm thick layers and be well compactedb) During compaction, care is to be taken to ensure that the corrosion protection system of the Lighting Column is not damagedc) Where the hole is back-fi lled with concrete, the concrete is to extend from the base of the Lighting Column to ground leveld) Where paving or bituminous surfacing is to be applied around the Lighting Column , the top level of the concrete may be lowered by the thickness of this surfacing.

2 And e) A duct with the same dimensions as the Lighting Column s cable entry slot is to be formed in the concrete using a suitable pre-formed lining minimum root diameters given in this brochure are based on the poorest ground conditions, as provided for in the British Standard publication PD6547:2004 The diameter will be smaller if the ground is betterG (kN/m2) per mQuality of Soil630 Good: Compact, well-graded sand and gravel, hard clay, well-graded fi ne and coarse sand, decomposed granite rock and soil 390 Average: Compact fi ne sand, medium clay, compact well-drained sandy loam, loose coarse sand and soils drain suffi ciently well that water does not stand on the : Soft clay, clay loam, poorly compacted sand, clays containing a large amount of silt and vegetable matter, and made-up soil are normally wet and have poor drainageGround Factor GExtract from PD 6547:2004 on ground conditions, in conjunction with BS EN 40-3-1 and -3 Fig 2 UndisturbedgroundCompactedfi ll material or concreteConcrete or PVC dim = root diameter + 100mmConcrete collar top & bottom100mm deepd = 50mmdZFig 1 DoorConnectionFuse cut - out unitELSAB1 - single lampELSAB12 - twin lampConcrete diameterDoorConnectionFuse cut - out unitELSAB1 - single lampELSAB12 - twin lampRoot MountingConcrete diameter44 Professional Lighting systems to suit any project.

3 Call 01623 518 333 45 Abacus offers a choice of passive and non passive concrete Foundations for fl ange plate mounting of Lighting taking the OTM (overturning moment) from the Column data matrix in the brochure, and identifying the correct ground pressure, the fully factored concrete foundation dimension can be determined from the tables (KNm)BearingPressure(KNm)A Width(mm)B Depth(mm)3M75375 8805903M10031008805903M15031508805904M75 475 9506254M10041009506254M15041509506255M75 575 10506755M100510010506755M150515010506756 M75675 11007006M100610011007006M150615011007008 M75875 11507258M100810011507258M150815011507251 0M751075125077510M10010100125077510M1501 0150125077515M751575140085015M1001510013 5082515M15015150135082520M75207515009002 0M10020100150090020M15020150150090030M75 30751700100030M100301001700100030M150301 501700100040M7540751900110040M1004010018 00105040M150401501800105050M755075210012 0050M100501001900110050M1505015019001100 Bolt Size & GradeProjection(mm)Tor que(Nm)M16*500 Long Grade *500 Long Grade *600 Long Grade *800 Long Grade (KNm)BearingPressure(KNm)A Width(mm)B Depth(mm)

4 3P15031506507504P15041507008005P15051507 508006P15061507509008P150815085095010P15 01015090095015P15015150950110020P1502015 01050120030P150301501200125040P150401501 250130050P1505015013501400 Non-passive mass concrete foundation dimensionsA non-passive foundation, where the ground pressure may be lower, takes no account of the side forces and is therefore shallower but passive foundation, where the ground pressure must be at least 150kN/m (or ), takes into account the side forces applied from the fi rmer ground. As a result, the concrete is typically narrower and deeper than down bolt projection & fi nal torque valuesPassive mass concrete foundation dimensionsFlange Plate Mounting Pressure distribution Pressure distributionPassive concreteTypically used with good ground with ground bearing pressure of not less than 150 KNmNon-passive concreteTypically used with uniform or poor subsoil with ground bearing pressure of 75-150 KNmSoil pressure distributionTemplateTemporary SupportCable DuctSpacer PlateABLower TemplateBolt ProjectionTypical section through foundation Professional Lighting systems to suit any project.

5 Call 01623 518 333 45


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