How to Measure Window Hinges: Key Sizes and Functions Explained!
Measuring window hinges is crucial for replacing or upgrading them. Here’s a step-by-step guide on how to measure window hinges and an overview of the key sizes and their functions.
"How to Measure Window Hinges: Key Sizes and Functions Explained!"
1. Measuring the Length of the Hinge
• Step 1: Open the window fully so you can see the entire hinge mechanism.
• Step 2: Measure the total length of the hinge. Most standard window hinges come in lengths such as:
o 8 inches (200mm) (top hung)
o 10 inches (250mm) (top hung)
o 12 inches (300mm) (top & side hung)
o 16 inches (400mm) (top & side hung)
o 20 inches (500mm) (top hung)
o 24 inches (610mm) (top hung)
• The length is important because it affects how far the window opens and the weight it can support.
2. Measuring the Stack Height
• The stack height refers to the distance between the two halves of the hinge when it is fully closed. This is measured from the base of the hinge to the top when the hinge is folded.
• Standard stack heights are typically:
o 13mm: This is common for older windows and provides less clearance between the sash and the frame.
o 17mm: This is more common in modern windows, as it allows for thicker glazing units and more robust weather seals.
• How to Measure: Use a ruler or caliper to measure from the underside of the sash hinge (part attached to the sash) to the top of the frame hinge (part attached to the window frame) when the hinge is closed.
*The shift from a 13mm to a 17mm stack height for window hinges is often associated with changes in window design and hardware standards in the industry, particularly in uPVC (unplasticized polyvinyl chloride) windows. This change became more common around the early to mid-2000s, when manufacturers began to standardize hinge designs to accommodate different frame profiles, insulation needs, and evolving building regulations, particularly concerning thermal efficiency and weather sealing.
The 17mm stack height allows for greater clearance, which helps with thicker gasket seals or glazing and improves the overall energy efficiency of the window. However, the exact timing can vary by region and manufacturer. If you need a specific date for a certain manufacturer or region, checking with suppliers or technical documentation from that era could provide more precise information.
3. Measuring the Width of the Track
• The width of the hinge track is another crucial dimension. The standard width is typically 18mm or 15mm (old style, found in caravans also).
• Measure across the hinge track where it attaches to the window frame.
4. Checking the Hinge Type
• There are different types of window hinges designed for specific functions:
o Standard Hinges: These are regular side-hung hinges for casement windows that open outward.
o Egress Hinges: Designed for fire escape purposes, these allow the window to open wider to meet egress requirements.
o Easy Clean Hinges: These allow the window to slide slightly to one side, making it easier to clean the outer pane from inside.
o Friction Hinges: These have a built-in friction mechanism that allows the window to remain open in various positions without a separate stay.
5. Determining the Offset and Handing
• Handing refers to whether the window is hinged on the left or right when viewed from inside. Be sure to note this when replacing a hinge.
• Some hinges have an offset, which determines how much the window sash moves outward when opened. Check this if you're looking for replacement hinges that match the original.
6. Weight and Load Rating
• Hinges come with different load ratings, which indicate the maximum window weight they can support. Larger and heavier windows may require heavy-duty hinges. For example:
o A 12-inch hinge can usually support around 22 kg (50 lbs).
o A 16-inch hinge might support windows up to 35 kg (77 lbs).
Key Functions of Window Hinges:
• Opening and Closing: They allow the window sash to pivot outward or inward.
• Friction Control: Friction hinges allow windows to stay open in various positions without additional hardware.
• Security: High-quality hinges improve the security of a window by making it more resistant to forced entry.
• Weather Sealing: The stack height plays a role in ensuring that the window closes tightly against the weather seal, improving insulation and preventing drafts.
• Fire Escape/Egress: Hinges designed for fire safety, like egress hinges, open wider to allow for a quick escape in emergencies.
By measuring the window hinge correctly and understanding the key sizes, you ensure a proper fit, function, and compatibility with your window's design.
Thank you..
Double Glazing Parts and Spares
Units 1-2, Ladykirk Business Park
9 Skye Road, Prestwick, KA9 2TA
Tel. 01292 280111
Email. [email protected]
Web. www.double-glazing-parts-spares.co.uk
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