Pad for support of equipment and method of producing same
A pad is provided for supporting heavy loads and is capable of supporting loads of 100 tons or more. The pad has a core having a bi-directional grid formed from parallel fiberglass materials, with a first set of material at right angle to a second set of fiberglass materials and which grid surrounds a closed cell material, which is infused with resin to form a core. A fiberglass top surface, bottom surface and at least one sidewall is provided. The result is a pad able to distribute very heavy loads, is resistant to bending, durable and light weight.
1. A pad for support of equipment, said pad capable of supporting loads of 100 A pad for support of equipment, said pad capable of supporting loads of 100 tons or more, comprising,
(a) a top surface, bottom surface and at least one sidewall comprising fiberglass material,
(b) a core having a thickness of at least 3.5 inches comprising,
(i) a grid formed by fiberglass webbing comprising (a) a first set of at least two web comprising fiberglass material, said at least two web spaced apart from and oriented parallel to each other and 3 inches to 8 inches apart, (b) a second set of at least two web of fiberglass material, said at least two web spaced apart from and oriented parallel to each other and 3 inches to 8 inches apart, said second set of web oriented at a right angle to said first set of web to form said grid, said web having a thickness of 0.024 to 0.75 inches such that said webbing has web modulus of elasticity of at least 1,000,000 pounds per square inch (psi), web tensile strength of at least 10,000 psi, and web in-plane shear strength of at least 5,000 psi;
(ii) closed cell material surrounded by said grid; and
(iii) resin infused into said grid to form a pad more than four inches thick and is capable of supporting loads of 100 tons or more.
2. The pad of claim 1 , wherein said webbing has a web modulus elasticity of 1,000,000 to 5,000,000 psi, web tensile strength of 10,000 psi to 60,000 psi, and web in-plane shear strength of 5,000 psi to 25,000 psi.
3. The pad of claim 1 , wherein one set of fiberglass material is thicker than the other set of fiberglass material.
4. The pad of claim 1 , wherein said fiberglass material comprises sheets of fiberglass, and said web comprises one or more of said sheets of fiberglass.
5. The pad of claim 1 , wherein said webbing comprises a plurality of web cells and the web cell aspect ratio of said grid is from 1 to 5.
6. The pad of claim 1 , wherein said web of fiberglass comprises fibers oriented in a direction of 0° to 90°.
7. The pad of claim 5 , wherein said fibers of one set of web of fiberglass material is oriented in a different direction from the other set of web of fiberglass material.
8. The pad of claim 1 , wherein said closed cell material comprises foam.
9. The pad of claim 1 , wherein said pad is 6 inches to 12 inches thick.
10. The pad of claim 1 , wherein said pad is substantially rectangular in shape.
11. The pad of claim 1 , wherein said pad is at least 6 feet in length, 4 feet in width and 6 inches in thickness.
12. The pad of claim 1 , wherein said pad is 8 feet in length, 5 feet in width and 10 inches thick.
13. The pad of claim 1 , said pad having crush strength of at least 500 pounds per square inch.
14. The pad of claim 1 further comprising a protective frame surrounding said pad.
15. A pad for support of equipment, said pad capable of supporting loads of 100 tons or more, comprising,
(a) a top surface, bottom surface and at least one sidewall comprising fiberglass material,
(b) a core having a thickness of 3.5 inches to 11.25 inches, said core comprising,
(i) a grid formed by fiberglass webbing comprising (a) a first set of at least two web comprising fiberglass material, said at least two web spaced apart from and oriented parallel to each other and 3 inches to 6 inches apart and having a thickness of 0.06 to 0.75 inches, (b) a second set of at least two web of fiberglass material, said at least two web spaced apart from and oriented parallel to each other and 4 to 8 inches apart and having a thickness of 0.024 to 0.25 inches, said second set of web oriented at a right angle to said first set of web to form said grid such that said webbing has web modulus of elasticity of 1,000,000 pounds per square inch (psi) to 5,000,000 psi, web tensile strength of 10,000 psi to 60,000 psi and web in-plane shear strength of 5,000 psi to 25,000 psi;
(ii) foam surrounded by said grid; and
(iii) resin infused into said grid to form a pad six to 12 inches thick and said pad is capable of supporting loads of 100 tons or more.
16. A method of producing a pad for support of equipment, said pad capable of supporting loads of 100 tons or more, the method comprising,
(a) forming a grid of fiberglass webbing comprising (a) a first set of at least two of web comprising fiberglass material, said at least two web spaced apart from and oriented parallel to each other and 3 inches to 8 inches apart, (b) a second set of at least two web of fiberglass material, said at least two web spaced apart from and oriented parallel to each other and 3 inches to 8 inches apart, said second set of web_oriented at a right angle to said first set of web to form said grid, said web having a thickness of 0.024 inches to 0.75 inches such that said webbing has web modulus of elasticity of at least 1,000,000 pounds per square inch (psi), web tensile strength of at least 10,000 psi and web in-plane shear strength of at least 5,000 psi;
(b) providing closed cell material surrounded by said grid;
(c) infusing resin into said closed cell material and said grid to form a core having a thickness of at least 3.5 inches;
(d) providing fiberglass material on the top surface and bottom surface of said core to form a pad at least four inches thick and said pad is capable of supporting loads of 100 tons or more.
17. The method of claim 16 further comprising preparing said core by providing a plurality of said closed cell materials adjacent to each other, said closed cell materials comprising parallel opposite side surfaces, parallel opposite faces perpendicular to said side surfaces and end surfaces, placing at least one sheet of web adjacent to said side surfaces of said closed cell materials, placing at least one web of fiberglass material adjacent to said opposite faces of said closed cell material such that said fiberglass adjacent said side surfaces is said first set of web and said fiberglass adjacent said opposite faces is said second set of web.
18. The method of claim 17 , wherein said at least one web of fiberglass material is placed by wrapping or encapsulating at least one sheet of fiberglass around said opposite side and opposite face surfaces of said closed cell material.
19. The method of claim 17 further comprising placing at least one second sheet of material adjacent said opposite side surfaces or said opposite face surfaces.
20. The method of claim 16 , wherein said closed cell material comprises foam.