Design Blueprint: Window Lock Spacing

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24121748): A wide sliding or casement window fitted with a single central lock can be opened by prying at a corner, flexing the meeting rail until the latch clears its keeper, without breaking anything. This study models the rail as a beam from stated values: a 700 N pry, an aluminium rail of elastic modulus 69 GPa and second moment of area 7.5e-9 m^4, and a 6 mm flex at which the latch disengages. Deflection grows with the cube of the unsupported span, reaching 6.09 mm at 0.6 m and 14.43 mm at 0.8 m, and the widest span that stays below the escape gap is 0.59 m. A window 1.8 m wide therefore needs 3 loc Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.