Removing a Bearing Wall and Adding a Stair Load in a 1925 Ward 6 Rowhouse
A contractor is renovating the first floor of a 1925 Ward 6 rowhouse. The owner wants to remove a 14-foot section of wall between the living room and dining room and carry the second floor with a flush beam. The existing framing is 2x10 joists at 16 inches on center spanning 14 feet, bearing on the wall in question and on the exterior masonry walls. The wall sits on a 4-inch concrete slab on grade, and there is no visible footing. A new stair is planned to land on the same beam, adding a concentrated load. The contractor's "engineer" is a home inspector who provides a one-page letter stating that a 3-ply 1.75-inch by 11.25-inch laminated veneer lumber beam is "adequate." The owner wants the wall down by Friday and has already ordered cabinets.
1. What is wrong with the proposed beam design, and what must be verified before the wall is removed?
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The letter is not a design. A home inspector is not a licensed design professional, and DC requires structural alterations to be designed and sealed by a professional engineer or architect licensed in DC. The letter contains no loads, no span calculation, no connection details, and no evaluation of the stair's concentrated load. Before demolition, verify the joist size, species, grade, spacing, and actual span, because a 14-foot 2x10 span may already be near its limit and the new beam changes how the load is delivered. Verify the beam's required size for the combined uniform and point loads; a 3-ply 11.25-inch LVL may or may not work, but nobody has shown it. Verify bearing at both ends: a masonry pocket needs adequate bearing length and a proper bearing plate, and the post or pier at the interior end needs a footing. The 4-inch slab on grade is not a footing, so a new pad or pier is likely required. Check the load path down to the foundation, the joist hangers and connections, and whether any plumbing, wiring, or ductwork runs in the wall. Only then can a sealed drawing and permit be produced.
2. Describe the temporary shoring and inspection sequence.
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Shore before cutting. Install temporary posts and beams on both sides of the wall, sized and spaced per the engineer, typically at 4 to 6 feet on center and bearing on solid plates, not on the finished floor. The shoring must pick up the joists before the wall is disturbed and must remain until the new beam, posts, and footing are complete and connected. Demolish the wall in controlled sections, not by pushing it over. Build the new footing or pier first, then set the posts and beam, then connect the joists with the specified hangers. Inspections follow the sequence: footing or pier inspection before concrete, framing inspection after the beam and connections are installed, and a final inspection after close-up. Keep the engineer available for the footing and connection inspections, and photograph each stage. Do not remove the temporary shoring until the engineer confirms the connections are complete and the beam is bearing properly. Cabinets can wait; a cracked second floor cannot be undone cheaply.
3. What should the contractor do about the engineer's letter and the owner's Friday deadline?
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Do not build from the letter, and do not let the cabinet delivery set the structural schedule. Tell the owner in writing that the wall removal requires a sealed design and a permit, that the one-page letter does not satisfy either, and that the Friday date cannot be met safely or legally. Offer a realistic sequence: engage a DC-licensed engineer, get the calculations and details, submit for permit, procure the beam, and schedule the shoring and inspection. If the owner pushes back, explain the specific risk: an undersized beam or missing footing can deflect, crack the second floor, or fail, and the contractor would be the first defendant. Document the refusal to proceed without a design, and keep the letter in the job file. If the owner wants to proceed at risk, that is not a risk the contractor should accept, because building without a permit and without a sealed design exposes the license and the insurance policy as well as the structure.