KOSTENLOSE WERKZEUGE
Holzscherwand-Design-Software
Design segmented wood shear walls to NDS® and SDPWS fast, accurately, and code compliant with this free version of our wood shear wall design software.
The software allows you to design wood shear walls split into full height panels between openings. The timber shear wall segments share the storey shear based on their stiffness and common wall displacement, and each is then checked against six utility ratios, including wall shear, hold down tension, column tension, column compression, sill crushing, and drift.
A ratio of exactly 0 for column compression or sill crushing means the chord is in net uplift at that load, so the check does not apply. It does not mean the check is comfortably satisfied.
Mit der Holzscherwand-Design-Software is part of the SkyCiv-Schnelldesignmodul. Try the tool out for free below:
About the NDS® Wood Shear Wall Design Software
Wood Shear Wall Design Software Hypotheses
- The software only supports the design of timber shear walls using the segmented method; perforated shear walls are not covered.
- Segments are defined in the openings table and are numbered left to right.
- Chords are braced out of plane by the sheathing and the stud wall, so column slenderness uses the full stud depth rather than the built-up post's least dimension.
- The size factor C_F is looked up on a single ply, not on the full built-up chord.
- Nails are considered as common nails, at the lengths SDPWS Table A1 tabulates.
- The shear-distribution provisions of SDPWS 4.3.5.5 are limited to a line whose walls share the same sheathing materials. This calculator does not use that exception: it solves 4.3.5.5.1 itself, giving every segment the same calculated deflection, which is a rational analysis that holds whether or not the assemblies match.
- The full tributary width of the wall resists uplift in the tension post, but only half the stud spacing amplifies compression in the compression post.
Wood Shear Wall Calculator Limitations
- Unblocked walls are limited to 16ft in length.
- Simultaneous uplift and shear is currently not validated.
- When a wall has double sheathing on both sides, the software considers that both are identical (same grade, Dicke, and nailing).
- Anchoring of the sill plate is not included. Uplift and linear shear forces are not transferred to the substrate. Please see the output for the governing magnitude for each segment.
- Sill crushing is unbounded above F_cp. Nothing caps the bearing overstress ratio, so a badly overloaded post produces a very large deflection.
- Framing width is not modelled. Every stud is a single 2x, and only the chords stack plies, so where SDPWS 4.3.7.1(5) calls for 3 in nominal framing and staggered nailing at adjoining panel edges, the software will raise a warning.
- Header and trimmer/king stud design is excluded. Only the wall panels between openings are designed here; the lintel spanning an opening and the studs framing it are not sized.
- Column compression is checked for the lateral load combination only.
Wood Shear Wall Software Design Checks
The wood shear wall software completes the following design checks, where each check is demand divided by capacity, evaluated per segment in every direction solved.
- Prüfen 1: Wall Shear. Determined against the SDPWS Table 4.3A nominal capacity for that segment's own sheathing assembly, modified by the following parameters:
- Ω_D (2.0 Wind, 2.8 seismisch)
- φ_aspect, the aspect ratio factor for slim shear walls (1.25 - 0.125 h/b above 2:1).
- φ_framing, the specific gravity adjustment 1 - (0.5 - G) for framing lighter than Douglas-Fir-Larch or Southern Pine.
- φ_pos, ein 0.92 reduction when the hold-down carrying tension is on the inside face of the end post (Hinweis 10). The note grants this to assemblies with 10d common nails only.
- C_ub for unblocked shear walls.
- Prüfen 2: Hold-down Tension. Determined against the selected model's rated capacity, rescaled from the specific gravity the catalogue tabulates it at (0.43 SPF/HF, 0.50 DF/SP) to the framing species chosen.
- Prüfen 3: Column Tension. In the tension chord, against F_t'.
- Prüfen 4: Column Compression. In the compression chord, against F_c'.
- Prüfen 5: Sill Crushing. The compression chord bearing across the grain into the sill plate, against F_cp' with the bearing area factor C_b. This is also the term driving the nonlinear part of the deflection, so failing it and a large drift tend to arrive together.
- Prüfen 6: Drift. The service displacement of the wall line against the selected allowable storey drift. It is a property of the line rather than of any one panel, so the same value repeats across every segment of a direction.
As stated earlier, a ratio of exactly 0 on column compression or sill crushing means the chord is in net uplift at that load, so the check does not apply. It does not mean the check is comfortably satisfied.
Selecting the Wood Shear Wall Drift Limit
- Wind: H/400 (Ursprünglich), H/500, H/600.
- Seismisch: H/40, H/50 (Ursprünglich), H/66.7, H/100, H/150.
Wood Shear Wall Software References
- Nationale Designspezifikation für den Holzbau 2018
- NDS® Supplement: Design Values for Wood Construction 2018
- Special Design Provisions for Wind and Seismic 2021
- ASCE 7: Minimum Design Loads
- ASTM D143: Standard Test Methods for Small Clear Specimens of Timber
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- SkyCiv-Schnelldesign
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- AS 4055 Windlastrechner
- AS 4100 Schraubengruppenrechner
- AS 4600 Designrechner für kaltgeformten Stahl
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