Add structural calculation worksheets

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

wood-joist/results.json

@@ -0,0 +1,80 @@
+{
+  "tool": "wood_joist",
+  "version": "0.1",
+  "project": "Pompano Beach",
+  "prepared_by": "Conemco Engineering",
+  "values": {
+    "span_ft": 9.0,
+    "w_plf": 975.0,
+    "wL_plf": 650.0,
+    "b_in": 3.5,
+    "d_in": 9.5,
+    "A_in2": 33.25,
+    "Ix_in4": 250.067708,
+    "Sx_in3": 52.645833,
+    "M_ftlbf": 9871.875,
+    "V_lbf": 4387.5,
+    "R_lbf": 4387.5,
+    "species_grade": "SP No. 2",
+    "Fb_psi": 2400.0,
+    "Fv_psi": 300.0,
+    "Fcp_psi": 565.0,
+    "E_psi": 1700000.0,
+    "Emin_psi": 510000.0,
+    "CD": 1.0,
+    "CM": 1.0,
+    "Ct": 1.0,
+    "CF": 1.0,
+    "Cr": 1.0,
+    "Cfu": 1.0,
+    "Ci": 1.0,
+    "Cvr": 1.0,
+    "le_in": 1.0,
+    "RB": 0.880631,
+    "Fb_star_psi": 2400.0,
+    "FbE_psi": 789157.894737,
+    "CL": 0.999848,
+    "Fb_prime_psi": 2399.634053,
+    "fb_psi": 2250.178077,
+    "Ma_ftlbf": 10527.561199,
+    "Fv_prime_psi": 300.0,
+    "fv_psi": 197.932331,
+    "lb_in": 2.5,
+    "bed_in": 3.0,
+    "Cb": 1.15,
+    "Ab_in2": 8.75,
+    "Fcp_prime_psi": 649.75,
+    "fcp_psi": 501.428571,
+    "delta_total_in": 0.338572,
+    "delta_live_in": 0.225714,
+    "delta_allow_total_in": 0.45,
+    "delta_allow_live_in": 0.3
+  },
+  "checks": {
+    "flexure": {
+      "demand": 2250.178077,
+      "capacity": 2399.634053,
+      "ok": true
+    },
+    "shear": {
+      "demand": 197.932331,
+      "capacity": 300.0,
+      "ok": true
+    },
+    "bearing": {
+      "demand": 501.428571,
+      "capacity": 649.75,
+      "ok": true
+    },
+    "deflection_total": {
+      "demand": 0.338572,
+      "capacity": 0.45,
+      "ok": true
+    },
+    "deflection_live": {
+      "demand": 0.225714,
+      "capacity": 0.3,
+      "ok": true
+    }
+  }
+}