Overview
A midrail is a fixed horizontal divider between groups of blades. Record its centre from the bottom shutter reference, especially when it needs to align with a transom or provide space in front of hardware.
Measuring for Midrails
A midrail divides the blades into upper and lower sections. Up to two positions can be specified where the configuration permits them. Aligning a rail with a window transom can make the horizontal lines look deliberate and can help manage an obstruction.
Measuring the Position of Your Midrail
Measure upward from the bottom shutter reference to the centre of the first midrail. Measure the second rail from that same bottom reference, not from the first rail. Use the recess bottom for an inside fit and the applicable finished lower frame boundary for a face fit.
Normal manufacture can move a requested centre by approximately ±15 mm to space the blades evenly. Select a critical position when exact alignment is needed; that can produce unequal top and bottom rails. Consider the normal viewing height as well as the window transom.
