US2015047278A1PendingUtilityA1

Thin cementitious decking members

29
Individually held — no corporate assignee on recordPriority: Aug 15, 2013Filed: Aug 8, 2014Published: Feb 19, 2015
Est. expiryAug 15, 2033(~7 yrs left)· nominal 20-yr term from priority
Inventors:Brian Blount
E04F 15/08E04F 15/02044E04F 15/02038E04C 5/08E04C 2/06E04B 5/023E04B 5/12E04F 2015/02094E04F 2015/02072
29
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Claims

Abstract

A thin cementitious decking member is described. The thin cementitious decking member can span and be attached to two or more support members. The thin cementitious decking member can include a binder and natural or artificial sands, stones, or other aggregates. The thin cementitious decking member should have a thickness no greater than 1 ¾″. The thin cementitious decking member can include pre-stressed tendons bonded to the thin cementitious member. The pre-stressed tendons can be tensioned to impose a longitudinal compressive force into a cross section of the member. In this manner, the thin cementitious member is capable of supporting weight over a span between the two support members greater than 4 times the width of the thin cementitious member.

Claims

exact text as granted — not AI-modified
1 . A decking system, comprising:
 two support members; and   a cementitious member spanning and attached to the two support members, the cementitious member including a binder and natural or artificial sands, stones, or other aggregates, the cementitious member have a length, a width, and a thickness, the thickness of the cementitious member no greater than 1¾″,   the cementitious member including pre-stressed tendons bonded to the cementitious member and tensioned to impose a longitudinal compressive force into a cross section of the member, so that the cementitious member is capable of supporting weight over a span between the two support members greater than 4 times the width of the cementitious member.   
     
     
         2 . A decking system according to  claim 1 , wherein the cementitious member is capable of supporting weight over a span between the two support members greater than 10 times the thickness of the cementitious member. 
     
     
         3 . A decking system according to  claim 2 , wherein the cementitious member is capable of supporting weight over a span between the two support members of up to 50 times the thickness of the cementitious member. 
     
     
         4 . A decking system according to  claim 1 , wherein the pre-stressed tendons are made of a non-corrosive material. 
     
     
         5 . A decking system according to  claim 4 , wherein the pre-stressed tendons are made of a material drawn from a set consisting of stainless steel type wire rope, synthetic materials, or carbon fiber. 
     
     
         6 . A decking system according to  claim 1 , wherein the pre-stressed tendons are tensioned to impose a longitudinal compressive force into the cross section of the member of between and including 400 and 1300 pounds per square inch (lb./in 2 ). 
     
     
         7 . A decking system according to  claim 1 , wherein the pre-stressed tendons are spaced equally above and below a center of mass of the cementitious member. 
     
     
         8 . A decking system according to  claim 1 , wherein the pre-stressed tendons are spaced equally to the right and left of a center of mass of the cementitious member. 
     
     
         9 . A decking system according to  claim 1 , wherein the cementitious member further includes perpendicular rods running perpendicular to the longitudinal tendons. 
     
     
         10 . A decking system according to  claim 1 , wherein the cementitious member further includes a slot for attaching the cementitious member to each of the two support members using tabs, the tabs including an upper portion shaped to fit into the slot in the cementitious member. 
     
     
         11 . A decking system according to  claim 10 , wherein a shape of a cross section of the slot is drawn from a set consisting of a triangle, a trapezoid, and a dovetail. 
     
     
         12 . A decking system according to  claim 10 , wherein the tabs include bearing points that extend to contact edges of the slot. 
     
     
         13 . A decking system according to  claim 10 , wherein the pre-stressed tendons are positioned within the cementitious member at least two times the diameter of the pre-stressed tendons from the slot. 
     
     
         14 . A decking system according to  claim 10 , wherein the slot is positioned approximately in the center of the cementitious member. 
     
     
         15 . A decking system according to  claim 10 , wherein:
 the slot is a longitudinal groove on at least one side of the cementitious member; and   the cementitious member further includes a second longitudinal groove on the at least one side of the cementitious member, the second longitudinal slot located at the bottom of the cementitious member.   
     
     
         16 . A decking system according to  claim 15 , wherein the tab includes a spacer to maintain a predetermined spacing between the cementitious member and an adjacent cementitious member. 
     
     
         17 . A decking system according to  claim 1 , wherein the cementitious member includes a longitudinal void. 
     
     
         18 . A decking system according to  claim 1 , wherein the cementitious member includes longitudinal grooves to facilitate airflow between the cementitious member and the two support members. 
     
     
         19 . A decking system according to  claim 1 , wherein the cementitious member is attached to the two support members using a fastener drawn from a set consisting of glue and screws. 
     
     
         20 . A decking system according to  claim 1 , wherein the cementitious member is made using a wet cast process. 
     
     
         21 . A decking system according to  claim 1 , wherein the cementitious member is made using a dry cast process. 
     
     
         22 . A cementitious member having a length, width, and thickness, comprising:
 a binder and natural or artificial sands, stones, or other aggregates; and   pre-stressed tendons bonded to the cementitious member and tensioned to impose a longitudinal compressive force into a cross section of the member, so that the cementitious member is capable of supporting weight over a span between the two support members greater than 4 times the width of the cementitious member, the thickness of the cementitious member no greater than 1¾″,   wherein the cementitious member is designed to span and be attached to two support members.   
     
     
         23 . A cementitious member according to  claim 22 , wherein the cementitious member is capable of supporting weight over a span between the two support members greater than 10 times the thickness of the cementitious member. 
     
     
         24 . A cementitious member according to  claim 23 , wherein the cementitious member is capable of supporting weight over a span between the two support members of up to 50 times the thickness of the cementitious member. 
     
     
         25 . A cementitious member according to  claim 22 , wherein the pre-stressed tendons are tensioned to impose a longitudinal compressive force into the cross section of the member of between and including 400 and 1300 pounds per square inch (lb./in 2 ). 
     
     
         26 . A cementitious member according to  claim 22 , further comprising a slot for attaching the cementitious member to each of the two support members using tabs. 
     
     
         27 . A cementitious member according to  claim 26 , wherein a shape of a cross section of the slot is drawn from a set consisting of a triangle, a trapezoid, and a dovetail. 
     
     
         28 . A cementitious member according to  claim 26 , wherein the slot is positioned approximately in the center of the cementitious member. 
     
     
         29 . A cementitious member according to  claim 26 , wherein:
 the slot is a longitudinal groove on at least one side of the cementitious member; and   the cementitious member further includes a second longitudinal groove on the at least one side of the cementitious member, the second longitudinal slot located at the bottom of the cementitious member.   
     
     
         30 . A cementitious member according to  claim 22 , wherein the cementitious member includes longitudinal grooves to facilitate airflow between the cementitious member and the two support members. 
     
     
         31 . A tab for connecting a cementitious member and a support member, comprising:
 means for attaching the tab to a support member; and   a top portion with an approximately triangular shape, the top portion designed to fit in a slot in the cementitious member.   
     
     
         32 . A tab according to  claim 31 , further comprising bearing points on the top portion of the tab that extend to contact edges of the slot in the cementitious member. 
     
     
         33 . A tab for connecting a cementitious member and a support member, comprising:
 means for attaching the tab to a support member; and   a top portion including two approximately horizontal legs, the two approximately horizontal legs designed to fit in a longitudinal groove in the cementitious member and a second longitudinal groove in an adjacent cementitious member.   
     
     
         34 . A tab according to  claim 33 , wherein the tab includes a spacer to maintain a predetermined spacing between the cementitious member and the adjacent cementitious member.

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