The bottom line is that your granite top could crack and tumble to the kitchen floor with as little as 100 or 150 pounds that s loaded at the center of the 50 inch span.
Tensile strength granite countertop.
While i can t say exactly what the tensile strength of your granite top is for its current thickness it s usually only ten percent of what it exhibits in compression.
Dielectric strength breakdown potential 8 5 kv mm 0 33 v mil.
Elastic young s tensile modulus.
Granite if you are wary of scratching or cracking your stone counter tops you may consider installing granite.
Photo courtesy of concrete countertop institute some countertop contractors use other reinforcement materials such as expanded metal and report good results.
You must realize that most if not all stones used for countertops have little to no tensile strength.
The information below gives homeowners an brief overview of the strength attributes of two popular stone types and their respective mohs hardness ratings.
27 gpa 3 9 x 10 6 psi.
70 gpa 10 x 10 6 psi.
But use of carbon fiber has migrated to concrete countertops because it has high tensile strength and is thin enough to fit in tight spots.
24 mpa 3 5 x 10 3 psi.
Ultimate uts 39 mpa 5 7 x 10 3 psi.
I would not be comfortable with corbels supporting granite marble or any other stone top that extends past 2 3 to sit on.