In the concept of spacetime fabric, weight and tensile strength are not applicable quantities in the same sense as they are for physical materials. The concept of spacetime fabric, often used in analogies to describe the curvature of spacetime caused by massive objects, is a way to visualize the effects of gravity according to Einstein's theory of general relativity.
In general relativity, gravity is not seen as a force acting within a fabric or medium; rather, it is described as the curvature of spacetime caused by the presence of mass and energy. Massive objects like planets, stars, and galaxies curve the fabric of spacetime around them, causing other objects to move along curved paths in their vicinity.
Therefore, discussing weight or tensile strength of the spacetime fabric is not meaningful in this context. The fabric of spacetime is not a physical substance with properties like weight or tensile strength that we can directly measure or quantify.
It's important to note that the concept of spacetime fabric is an analogy used to help visualize and understand the effects of gravity in general relativity, rather than a literal description of a physical material.