King Post Roof Ridge Support for Open Interiors
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Solution Overview
Problem
Cathedral ceiling designs face structural complexity and visual unattractiveness when incorporating intersecting galleries, as existing support methods either require complex rafter arrangements or tie beams that encumber interior space and aesthetics.
Innovation Solution
A roof construction where a king post is suspended from a primary ridge, supporting secondary ridges orthogonally, allowing for an open interior space without the need for additional support posts, using a king post that is secured to the primary ridge with through bolts and stabilized by braces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If tie beams are used to support intersecting roof ridges, then structural support is provided, but interior space is encumbered and aesthetics are compromised
Solution Approach 1:
The invention transitions from horizontal tie beams to a vertical king post configuration. The king post extends vertically from the gallery floor to support the intersecting roof ridges at their intersection point, utilizing the vertical dimension rather than horizontal spanning. This dimensional change eliminates the need for encumbering tie beams while maintaining structural support.
2Strength
If posts are used to support intersecting roof ridges, then structural support is provided, but the floor plan is encumbered and open area is interrupted
Solution Approach 1:
The invention extracts the support function from the horizontal plane (tie beams) and concentrates it in a single vertical element (king post). By taking out the support requirement from the floor level and placing it at the ridge intersection above, the design maintains structural support while preserving the open floor plan and uninterrupted open area below.
3Strength
If complex rafter arrangements are used to support intersecting ridges, then structural support is provided, but visual appeal is reduced
Solution Approach 1:
The invention segments the support function into distinct components: the king post handles ridge support at the intersection, while the existing rafter systems maintain their simpler, more aesthetically pleasing configurations. This segmentation allows each element to perform its function without requiring complex arrangements, preserving visual appeal while ensuring structural support.
Data Source
AI summary
A roof construction has a primary ridge member with a king post depending from the ridge member. A pair of secondary ridge members are secured in sockets in the king post at different heights.