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The Shearwalls installation contains a limited number of hold-downs, from the Simpsons Strong-Tie Bolt Hold-down Evaluation Report 0143 and the Simpson Strong-Tie Nail Hold-down Evaluation Report 0130.
Bolted Hold-downs
The hold-downs in the initial database that are connected to the upper and lower studs via bolts, from Evaluation Report 0143, are HD2A, HD5, HD7, HD9, HD12, and HD19. For each of these, there is a corresponding hold-down, e.g. HD2A-2, for which the displacements are taken from Table 2 of the evaluation report. For the hold-downs from Table 2, the displacement values are for the hold-down bracket only, and the anchor bolt elongation and horizontal bolt slip are analysed separately by Shearwalls. The displacement values for hold-downs from Table 1, e.g. HD2A, are for the entire hold-down assembly.
Nailed Hold-downs
The hold-downs in the initial database that are connected to the upper and lower studs via nails, from Rvaluation Report 0130, are LTT19 and LTT4. The displacements for these hold-downs are for the entire assembly (nails, anchor bolt, and strap). However, it is possible to enter nailed hold-downs into the database for which these components are analysed separately by Shearwalls.