creamy

   Prestressed concrete lintels are incredibly strong because they are made by casting the concrete around high tensile stretched wires that are anchored into the concrete.   The concrete is compressed by the stress in the wires. This makes it very strong so that it can overcome heavy loads, heavy stress, and lasts longer compared to regular concrete.   You basically have added protection around the concrete so that any stress or heavy load is taken on by the wires before it gets to the concrete.   The reasons for prestressed concrete lintels being so durable and practical are also the reasons why it is hard to cut.   However, they can be cut, preferably by concrete cutting professionals using the right tools and equipment.   Cutting or minor trimmings at the ends are okay and should not cause any problems but cutting near the centre can affect the lintel’s load capacity.   It is important to consult a structural engineer before any cutting is don...