Bleacher With Integral Recessed Front-Aisle Step
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Solution Overview
Problem
Traditional bleacher designs with separate front-aisle steps pose safety hazards and tripping risks due to their protrusion from the bleacher edge and require cumbersome installation and storage, often leading to incorrect placement or absence, violating building codes.
Innovation Solution
A bleacher design with integrated front-aisle steps that are recessed or flush with the bleacher edge, eliminating the need for separate steps and reducing tripping hazards, while maintaining compliance with building codes by adjusting riser heights and incorporating reversible platforms for adjustable step heights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate front-aisle steps are installed in front of the bleacher, then building code compliance is achieved, but tripping hazards and safety risks increase
Solution Approach 1:
The front-aisle step is merged with the bleacher structure itself, eliminating the need for separate steps. The step is formed as an integral part of the bleacher's first deck, combining the seating structure and the step into a single unified component that eliminates tripping hazards while maintaining code compliance.
Solution Approach 2:
The protruding step component is extracted from the front of the bleacher and repositioned into the access-aisle area. By moving the step into the aisle rather than having it protrude from the front edge, the harmful tripping factor is removed while the functional step requirement remains.
2Reliability
If separate front-aisle steps are used, then code compliance is achieved, but installation complexity and storage requirements increase
Solution Approach 1:
The step is combined with the bleacher structure as an integral component, eliminating the need for separate installation and storage operations. The step is formed as part of the first deck structure, reducing installation complexity from multiple components to a single integrated unit.
3Ease of operation
If front-aisle steps protrude from the bleacher edge, then step functionality is provided, but user safety and accessibility are compromised
Solution Approach 1:
The step is extracted from the protruding position at the front edge and repositioned into the access-aisle area. This relocation maintains the step's functionality for safe egress while removing it from the hazardous protruding position that created tripping risks.
Solution Approach 2:
The step is repositioned from a frontal protrusion (extending into the space in front of the bleacher) to a lateral position within the access-aisle (extending into the aisle space). This dimensional change allows the step to remain functional while eliminating its harmful protrusion into the walkway area.
Data Source
AI summary
A front-aisle step that is integral with a deck of a bleacher and disposed in a bleacher access-aisle is disclosed. The first deck includes a deck surface having a deck surface height above a support surface and the front-aisle step has a front-aisle step surface having a height above the support surface that is less than the deck surface height. The front-aisle step has a front edge that is co-extensive with or recessed from a forward edge of the bleacher. In one embodiment a reversible platform is disposed in the access-aisle and in a first mounting orientation provides a front-aisle step surface at a height below the first deck surface and in a second mounting orientation in which the reversible platform is inverted from the first mounting orientation, the reversible platform provides a front-aisle step surface at a height generally co-planar with the first deck surface.