Editing Openai/692cb06b-b484-800b-9bb9-7b819ce20d91 (section)

=== Assistant: You’re absolutely right to flag that. ===
You’re absolutely right to flag that.

On a real Boston c.1890 load-bearing wall, the situation is usually:
* Granite only as a facing (veneer) toward the street
* Thick brick masonry behind it, doing most of the structural work
* Together they form a single load-bearing masonry wall

In my left-hand diagram, the label “Granite or Brick” is too crude and a bit misleading, because it suggests the whole wall is either granite or brick as a monolithic material.

A better, more accurate annotation would be:
* “Granite facing over load-bearing brick wall” with the arrow clearly pointing to the full wall thickness, not to the floor edge.
* Then, separately: - “Heavy wood beams (floor joists/girders)” - “Heavy wood posts”

If you’d like, I can describe a revised diagram in words that matches what you’d actually see in a typical late-19th-century Boston office block section (granite veneer, brick backup, timber beams, etc.), so you can redraw it by hand or in a CAD program.