Tower foundation Clause Samples

Tower foundation. Once the contract is awarded to the supplier, foundation loads will be made available for the supplier to commence with the construction of the foundations in strict accordance to general tower specification, 240- 59967638. Although foundation drawings has been provided with the tender documents, it shall be used for costing only. Should the contractor opt to use their own drawings they need to resubmit back to Eskom using their own format with company logo for approval. a) The following foundations types will be acceptable for use by Eskom: Self-Supporting Towers:  Raft Foundations (single concrete slab/ raft connected to base of tower) - on the surface or below natural ground level.  Individual pad foundations – individual concrete foundations per tower leg consisting of the column extended above ground, extending into pad and plinth below ground level.  Piled foundations- individual foundation per tower leg consisting of a pile cap connecting multiple piles. b) The following soil design parameters must be used for the construction of the foundation based on normal soil conditions.  normal soil – equal or better consistency than one encountered in stiff cohesive soil or dense cohesion less soils above the water table  minimum allowable soil bearing pressure - 150kPa  soil uplift frustum angle – 30 degrees The foundation is designed with a resistance factor of not less than 1.5 for uplift, sliding and overturning moments. These checks will be based on the serviceability loads indicated above. The foundation is designed for the maximum combinations of vertical compression, uplift, and horizontal shear loads acting at ground level. Maximum allowable displacement under ultimate load conditions shall be less than 20mm. The foundation concrete strength shall be in accordance with SANS 10100, based on ultimate foundation loads.