Manufactured Home Door Sill Structure for Load Support and Drainage
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Solution Overview
Problem
Existing door threshold designs for manufactured homes fail to adequately support the weight of objects or individuals, leading to deflection, degradation, and moisture accumulation, which compromises the integrity of the sill and underlying structures.
Innovation Solution
A door sill apparatus with additional supports, including base, drip, and cross supports, that distribute loads efficiently and prevent moisture accumulation, featuring removable attachment to a substrate using securing legs and a drip leg to direct water away from the threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If prior threshold designs are used in manufactured homes, then the threshold can bear the full weight of objects or individuals, but the threshold deflects significantly causing bending and degradation
Solution Approach 1:
The threshold is divided into multiple segments: the main threshold body and separate support members that extend into the substrate. This segmentation allows the threshold to bear loads while the support members prevent excessive deflection by distributing forces to deeper structural elements.
Solution Approach 2:
Support members are strategically positioned at specific locations where deflection is most likely to occur, providing localized reinforcement only where needed rather than uniformly throughout the entire threshold structure.
2Reliability
If prior threshold designs are used in manufactured homes, then the threshold provides basic protection, but water accumulates underneath the threshold and next to the sill substrate
Solution Approach 1:
The support members extend vertically downward from the threshold into the substrate, creating a three-dimensional structure that redirects water flow away from problematic accumulation zones underneath the threshold and next to the sill substrate.
Solution Approach 2:
The support members act as intermediary elements between the threshold and the deeper substrate structure, intercepting and redirecting water flow before it can reach and accumulate in vulnerable areas.
3Device complexity
If prior threshold designs are used in manufactured homes, then the threshold is simple in construction, but caulking and sealants crack and degrade
Solution Approach 1:
The threshold system is segmented into the main threshold body and separate support members, allowing the sealants to be applied only at the joints between these segments rather than along the entire length of the threshold, reducing stress and preventing cracking.
Data Source
AI summary
A door sill apparatus for a manufactured home comprising a substrate having an inner edge and an outer edge and a threshold member configured to be removably secured to the substrate, the threshold member having a deck at least partially covering the substrate, an upper surface, an opposing lower surface, and a deck support having a base leg, a drip leg, and a cross support connecting the base leg to the drip leg. The base leg and drip leg extend downward from the deck such that the base leg contacts the subfloor of the manufactured home, reinforcing the threshold member. The drip leg extends below the plane in which the subfloor and substrate, preventing water intrusion. The cross member connects the base leg and the drip leg and stiffens and reinforces the portion of the deck extending past where the base leg extends downward.