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Mechanical
HVAC Load · Manual J
Hold-down & Anchorage
Shear-wall overturning: hold-down device, anchor rod & concrete breakout.
Code edition
NDS 2018
NDS 2024
Design diagram
— updates live with your inputs
Demand
Overturning tension T
(lb)
Net uplift from the shear wall (from the shear-wall report)
Resisting dead load D
(lb)
Dead load at the hold-down post that resists overturning
Use 0.6 D resistance
Yes
ASCE 7 overturning combination 0.6 D
Hold-down Device
Hold-down device
Auto (smallest that passes)
HDU2
HDU4
HDU5
HDU8
HDU11
HDU14
Auto picks the lightest HDU that carries T_net
Anchor Rod & Concrete
Anchor rod diameter
(in)
1/2
5/8
3/4
7/8
1
Anchor rod grade
A36 / F1554 Gr.36 (Fu=58 ksi)
A307 (Fu=60 ksi)
F1554 Gr.55 (Fu=75 ksi)
A449 / F1554 Gr.105 (Fu=120 ksi)
Concrete f'c
(psi)
Anchor embedment h_ef
(in)
Edge distance c_a
(in)
Nearest concrete edge to the anchor
Seismic (vs wind)
Yes
Applies the 0.75 seismic factor to concrete breakout
Run calculation
NDS 2018