Add structural calculation worksheets

Collection of engineering calculation projects (Python + Typst), each with
input, calc script, tests, results, and generated PDF where available.

steel-beam/results.json

@@ -0,0 +1,69 @@
+{
+  "tool": "steel_beam",
+  "version": "0.1",
+  "project": "Casablanca Hotel - 16 Steel Joists Replacement",
+  "prepared_by": "Conemco Engineering",
+  "section": "W10X15",
+  "values": {
+    "beam_length_ft": 9.0,
+    "unbraced_length_in": 108.0,
+    "factored_uniform_load_kipft": 0.802444,
+    "service_load_lbf_ft": 548.98,
+    "moment_kipft": 8.124,
+    "shear_kip": 3.611,
+    "E_ksi": 29000.0,
+    "Fy_ksi": 50.0,
+    "Lp_in": 34.332994,
+    "Lr_ft": 8.608917,
+    "Lb_ft": 9.0,
+    "rts_in": 1.01,
+    "Fcr_ksi": 32.555772,
+    "Mp_kipft": 66.666667,
+    "MnLTB_kipft": 37.439137,
+    "Mn_kipft": 37.439137,
+    "phiMn_kipft": 33.695224,
+    "Aw_in2": 2.5,
+    "lambda": 38.5,
+    "lambda_lim": 53.946344,
+    "kv": 5.34,
+    "Cv1": 1.0,
+    "phi_v": 1.0,
+    "phiVn_kip": 75.0,
+    "delta_limit_in": 0.45,
+    "delta_in": 0.040559,
+    "ltb_mode": "elastic LTB",
+    "section_A": 4.41,
+    "section_d": 10.0,
+    "section_b": 4.0,
+    "section_tf": 0.25,
+    "section_tw": 0.25,
+    "section_Ix": 68.9,
+    "section_Zx": 16.0,
+    "section_Sx": 13.8,
+    "section_Iy": 2.89,
+    "section_Zy": 2.3,
+    "section_Sy": 1.45,
+    "section_ry": 0.81,
+    "section_J": 0.104,
+    "section_rts": 1.01,
+    "section_ho": 9.72,
+    "section_lambda": 38.5
+  },
+  "checks": {
+    "flexure": {
+      "demand": 8.124,
+      "capacity": 33.695224,
+      "ok": true
+    },
+    "shear": {
+      "demand": 3.611,
+      "capacity": 75.0,
+      "ok": true
+    },
+    "deflection": {
+      "demand": 0.040559,
+      "capacity": 0.45,
+      "ok": true
+    }
+  }
+}