Xstrata Sa Pty Ltd Rhombus. Brits. 0.0. 0 reviews. Have you used this business? Write Review. Request a Quote. Direct Effective Solutions. Hartbeespoort. We are a Direct Effective Solution to any Problem. We do the following work -Civil Works : Drains, Gabions, Slabs, Head and Wing Walls, Kerbing, Paving, Culverts, Drop Inlets.