Sill Plate Anchorage Assembly for Accurate Wall-to-Foundation Alignment
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Solution Overview
Problem
Existing methods for attaching pre-fabricated wall panels to concrete foundations are inefficient, requiring extra labor and time due to misalignment of anchor bolts, drilling into cured concrete, and conflicts with utility rough-ins, leading to increased construction costs and delays.
Innovation Solution
A sill plate anchorage assembly with anchor shafts embedded in a concrete formwork before pouring, allowing secure attachment of pre-fabricated walls without aligning bolts with sill plates or drilling into cured concrete, and providing markings for utility rough-ins to avoid conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anchor bolts are set into the concrete foundation before the concrete pour, then the wall panels can be attached to the foundation, but the anchor bolts are frequently displaced from their initial positions during the pouring process, requiring additional drilling and framing modifications
Solution Approach 1:
The patent applies preliminary action by pre-attaching the anchor bolts to the sill plate before the concrete pour, ensuring their positions are fixed relative to the wall panel. The sill plate assembly with pre-positioned anchor bolts is then placed on the cured concrete, eliminating the need to set bolts in the concrete itself and preventing displacement issues.
Solution Approach 2:
The patent segments the anchoring system into two independent parts: the sill plate with pre-attached anchor bolts (movable component) and the concrete foundation (fixed component). This segmentation allows the anchor bolts to be precisely positioned on the sill plate without being affected by concrete pouring operations, while still achieving secure attachment to the foundation.
2Strength
If holes are drilled deep into the cured concrete footers for receiving anchor bolts, then the anchor bolts can be securely set, but the process requires significant labor, is sensitive to weather conditions, and requires extensive pull testing
Solution Approach 1:
The patent inverts the traditional anchoring sequence by attaching the anchor bolts to the sill plate first (above ground) and then placing the assembly on the concrete foundation, rather than setting the bolts in the concrete first and then attaching the sill plate. This inversion eliminates the need for drilling into cured concrete and reduces the anchoring process to simple placement and fastening.
Solution Approach 2:
The patent extracts the anchor bolt attachment process from the concrete pouring and curing process, performing it separately on the sill plate before final installation. This separation eliminates the complexity of drilling into cured concrete, weather sensitivity, and extensive pull testing requirements.
3Ease of manufacture
If utility rough-ins are cast into the concrete before vertical wall panels are installed, then the utilities are positioned, but the locations of rough-ins often interfere with framing elements in pre-fabricated wall panels, requiring on-site modifications
Solution Approach 1:
The patent applies preliminary action by marking the sill plate with framing element location information before the wall panels are installed. This allows utility rough-ins to be positioned in advance with precise knowledge of where framing elements will be located, preventing conflicts before they occur and eliminating the need for on-site modifications.
Data Source
AI summary
A sill plate anchorage assembly for supporting prefabricated building walls includes an elongated member having spaced holes. A concrete formwork defines a space for receiving concrete to form a foundation to support the elongated member. The elongated member may be supported temporarily from the formwork. Anchor shafts extend within each of the spaced holes and extend below the elongated member into the space defined by the concrete formwork. After forming and curing the concrete, nuts or other fasteners are tightened over the upper ends of the anchor shafts to secure the elongated member against the foundation. The upper portions of the spaced holes may include enlarged recesses for receiving the fasteners. Indicia marked upon the elongated member may show the location and type of pass-through regions. A method to secure a horizontal sill plate to an underlying concrete foundation to support vertical building wall panels is also disclosed.