Structural Calculation and Drawing Expert

NOTE: Please submit proposal if you can do this task by Thursday July 9th Design a replacement beam and supporting connections for the removal of one interior load-bearing wall separating the kitchen and living room to create an open-concept great room. EXISTING CONDITIONS: • Exterior walls: Adobe construction • Interior bearing wall (being removed): Wood-frame — 2×4 studs with double top plate, drywall both sides, 4½" total thickness (confirmed from field) • Roof structure: Flat/low-slope roof, no attic. 4×10 beams at 32" O.C. with 2×10 rafters per original 1977 framing plan. Plywood sheathing directly on beams. R-30 fiberglass batt insulation in shallow cavity. • Skylight: One skylight added post-construction in kitchen ceiling — roof was previously cut and reframed around it. • Sunken living room: Originally sunken, has been raised with a 4" concrete slab pour (level with adjacent rooms now). FIELD MEASUREMENTS: • Living Room: 27'-6½" × 19'-11" • Kitchen: 20'-4" × 9'-10½" • Dining Room: 12'-11" × 9'-9" • Ceiling height — Kitchen/Breakfast nook: 8'-2" • Ceiling height — Living room (kitchen side): 8'-11" (107") • Ceiling height — Living room (hall bath side): 9'-2" (110") • Bottom of existing beam (LR, kitchen side): 98½" (~8'-2½") • Bottom of existing beam (LR, hall bath side): 101½" (~8'-5½") • Note: 3" difference in existing beam heights across the living room — indicates stepped roof framing or beams at different levels. SPAN: • Clear span approximately 20 feet (full length of wall being removed) • Possible intermediate support: Homeowner is considering a column at one end, concealed behind a refrigerator, to reduce the clear span. Final decision pending — design should address full 20' span and note reduced span option if column is used. DELIVERABLES REQUIRED: 1. Beam sizing and selection (steel W-shape or glulam — homeowner prefers exposed glulam at ~7'-6" to 7'-8" if structurally feasible; if headroom is insufficient, steel recessed into roof framing is the alternative) 2. Structural calculations per IRC/IBC for: o Gravity loads (dead + live roof loads) o Beam sizing for the span o Connection design — beam to bearing points at each end o Column/post design at bearing points if applicable o Foundation/footing adequacy check at concentrated point loads 3. Structural detail drawings: o Beam plan and section o Connection details (joist hangers / decorative brackets where existing N-S beams/rafters tie into the new beam) o Bearing point details o Temporary shoring notes for construction sequence REFERENCE DOCUMENTS AVAILABLE: • Original 1977 architectural plans (floor plan + roof framing plan) • Field photos — exposed ceiling showing framing, ductwork, plumbing vent, and electrical routing above the wall • Field measurements NOTES: • MEP elements (HVAC ductwork, PVC plumbing vent, electrical cables) currently run through the ceiling cavity above and across the bearing wall — rerouting will be coordinated separately and is not part of this structural scope. • Interior wall is confirmed wood-frame, NOT adobe. The "8-inch bearing" notation on the 1977 plans refers to exterior adobe walls only. • The shallow roof cavity limits beam depth — headroom constraint is the primary design driver. For the images — here are the field photos from the homeowner that should go with this scope. • IMG_0734 — Exposed kitchen ceiling, showing beams and roof sheathing • IMG_0735 — Interior wall framing visible (2×4 studs, double top plate confirming wood-frame) • IMG_0737 — Wider ceiling view with ductwork and plumbing vent crossing • IMG_0738 — Ceiling cavity with electrical routing and junction box • IMG_0739 — Close-up showing plywood sheathing above beams • 1977 original plans (floor plan + roof framing plan)