Profile: Coltman Precast Concrete Ltd. is a supplier of precast concrete products to the construction industry. We are a BS EB ISO9001:2000 and BS EN ISO 14001:1996 certified company. Our product line includes hollowcore pre-stressed flooring, pre-stressed solid slabs, staircases, terracing, and bespoke products. Our services include delivery, installation, risk assessments, safety netting, and trailer air nets. We can provide and install the following safety equipment to supplement our installation services.