A flooring element is used in a raised floor having removable flooring panels and a supporting structure and having a load bearing surface. The flooring element includes a roll of flexible sheet material mounted on the flooring element. The flooring element may include a flooring stringer or an inse
A flooring element is used in a raised floor having removable flooring panels and a supporting structure and having a load bearing surface. The flooring element includes a roll of flexible sheet material mounted on the flooring element. The flooring element may include a flooring stringer or an insert. After removal of an overlying flooring panel to reveal an opening to a sub-floor void, the roll of flexible sheet material may be extended from the roll and affixed to an attachment means at an opposite side of the opening so as to substantially cover the opening and provide a warning of a removed panel.
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1. A flooring element for a raised floor comprising one or more removable flooring panels and a supporting structure and having a load bearing surface, the flooring element comprising: a roll of flexible material sheet mounted to the raised floor, the roll of flexible material sheet being operable,
1. A flooring element for a raised floor comprising one or more removable flooring panels and a supporting structure and having a load bearing surface, the flooring element comprising: a roll of flexible material sheet mounted to the raised floor, the roll of flexible material sheet being operable, after removal of an overlying flooring panel to reveal an opening to a sub-floor void, for extending from the roll of flexible material sheet and for affixing to an attachment point at an opposite side of the opening to the sub-floor void so as to substantially cover the opening and provide a warning after removal of the overlaying flooring panel, wherein the roll of flexible material sheet when deployed is bowed upwards responsive to pressure of conditioned air in the sub-floor void so as to provide increased visibility and an enhanced warning effect. 2. The flooring element of claim 1, wherein the flooring element mounting the roll of flexible material sheet comprises a flooring stringer. 3. The flooring element of claim 2, wherein the roll of flexible material sheet is mounted to a lower horizontal surface of the flooring stringer. 4. The flooring element of claim 1, wherein the flooring element mounting the roll of flexible material sheet comprises an L-shaped mounting bracket that is placed in a space previously occupied by a flooring panel after removal of the overlaying flooring panel. 5. The flooring element of claim 4, wherein the L-shaped mounting bracket comprises a rectangular frame. 6. The flooring element of claim 5, wherein the roll of flexible material sheet is mounted to a lower horizontal surface of the rectangular frame. 7. The flooring element of claim 5, wherein the roll of flexible material sheet is mounted to an upper horizontal surface of the rectangular frame. 8. The flooring element of claim 1, wherein the roll of flexible material sheet comprises one of: an elastomeric material, a woven material, a cloth material, a plastics material, or a combination thereof. 9. The flooring element of claim 1, wherein the roll of flexible material sheet comprises warning indicia visible when the roll of flexible material sheet is extended. 10. The flooring element of claim 1, wherein the flooring element is a component of a flooring system. 11. A flooring stringer for forming a part of a supporting structure for a raised floor comprising one or more removable flooring panels having a load bearing surface, the flooring stringer comprising: a roll of flexible material sheet mounted to a lower horizontal surface of the raised floor, the roll of flexible material sheet being operable, after removal of an overlying flooring panel to reveal an opening to a sub-floor void, for extending from the roll of flexible material sheet and for affixing to an attachment point at an opposite side of the opening to the sub-floor void so as to substantially cover the opening and provide a warning after removal of the overlaying flooring panel, wherein the roll of flexible material sheet when deployed is bowed upwards responsive to pressure of conditioned air in the sub-floor void so as to provide increased visibility and an enhanced warning effect. 12. An L-shaped mounting bracket for positioning below a flooring panel of a raised floor comprising one or more removable flooring panels and a supporting structure and having a load bearing surface, the L-shaped mounting bracket comprising: a roll of flexible material sheet mounted to the raised floor, the roll of flexible material sheet being operable, after removal of an overlying flooring panel to reveal an opening to a sub-floor void, for extending from the roll of flexible material sheet and for affixing to an attachment point at an opposite side of the opening to the sub-floor void so as to substantially cover the opening and provide a warning after removal of the overlaying flooring panel, wherein the roll of flexible material sheet when deployed is bowed upwards responsive to pressure of conditioned air in the sub-floor void so as to provide increased visibility and an enhanced warning effect. 13. The L-shaped mounting bracket of claim 12, wherein the L-shaped mounting bracket comprises a rectangular frame. 14. The L-shaped mounting bracket of claim 13, wherein the roll of flexible material sheet is mounted to a lower horizontal surface of the rectangular frame. 15. The L-shaped mounting bracket of claim 13, wherein the roll of flexible material sheet is mounted to an upper horizontal surface of the rectangular frame. 16. The L-shaped mounting bracket of claim 12, wherein the roll of flexible material sheet comprises one of: an elastomeric material, a woven material, a cloth material, a plastics material, or a combination thereof. 17. The L-shaped mounting bracket of claim 12, wherein the roll of flexible material sheet comprises warning indicia visible when the roll of flexible material sheet is extended. 18. The L-shaped mounting bracket of claim 12, wherein the L-shaped mounting bracket is a component of a flooring system.
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