Garage Shear Wall Line Design: Multiple Panels with Opening per SDPWS C4.3.5.5.1

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Garage Shear Wall Line Design: Multiple Panels with Opening per SDPWS C4.3.5.5.1

Summary: Design a garage end wall with three shear wall segments and 6 ft openings per SDPWS C4.3.5.5.1 simplified approach. Free shear wall design tool to check…

Overview

Building / scenario

  • Occupancy / use: Residential, garage
  • Geometry / size: 8+6+8 ft wide, 6 ft spacing
  • Site / exposure: ASCE 7-22

Problem statement

In a residential building, a garage end wall has openings between shear wall segments. The wall line has three panels: 8 ft wide, 6 ft wide (narrowest), and 8 ft wide, each 8 ft tall. There is 6 ft between each panel (garage door opening). The total lateral wind load at the top of the wall line is 5,000 lb. Dead load is 45 plf. Check capacity and size hold-downs for each segment end. Boundary forces T and C from Eq 4.3-7 drive hold-down design.

Workflow in StructSuite

StructSuite's free shear wall design calculator uses SDPWS C4.3.5.5.1 simplified approach to distribute shear in proportion to strength of each wall. Nominal capacity from Table 4.3A; Va = Vn/2.0 for wind (§4.1.4.2). Boundary forces T and C per Eq 4.3-7 computed for each segment end. In Step 4 select hold-down model per governing demand; anchor bolt diameter shown in Simpson table.

Design considerations (excerpt)

Shear distributes by relative strength: stronger segment takes more force. Narrowest (6 ft) often critical—least capacity, may receive similar shear as 8 ft segments. Each segment needs hold-downs at both ends. Garage doors typically 8–9 ft; 6 ft opening = single door or custom.

Opening width (6 ft) does not directly affect shear capacity but affects collector design—forces must transfer around openings. Larger openings = longer collectors, more chord force. Spacing used in C4.3.5.5.1 simplified method for distribution.

5,000 lb total on 22 ft of wall (8+6+8) ≈ 227 plf average. Garage end walls often receive 20–30% of total diaphragm force. Wind typically governs for residential garage;…

Related terms

  • StructSuite
  • structural engineering
  • design example
  • shear wall
  • SDPWS
  • multiple walls line

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