Hold-Down Detail Key

Last updated March 24, 2023
By Emma Howland

HD-Type Condition Capacity

Concrete Embedded New Construction

Rim Joist
HD-A (RJ2)	HDU2 SSTB16 Min. (2) 2x studs	2,215 lb
HD-A (RJ4)	HDU4 SSTB24 Min. (2) 2x studs	3,285 lb
HD-A (RJ5a)	HDU5 SB5/8 Min. (2) 2x studs	4,340 lb
HD-A (RJ5b)	HDU5 SB5/8 Min. (2) 2x studs	5,730 lb		Requires 8″ concrete stem wall
HD-A (RJ8)	HDU8 SSTB28 Min. (3) 2x studs	6,395 lb		Requires 8″ concrete stem wall
HD-B (RJ4)	HDU5 PAB4 Min. (2) 2x studs	4,270 lb
HD-B (RJ5)	HDU8 PAB5 Min. (3) 2x studs	6,675 lb
HD-B (RJ6)	HDU11 PAB6 Min. 4×6 DF #1	9,535 lb
HD-B (RJ7)	HDU14 PAB7 4×8 DF #1 or 6×6 DF #1	13,080 lb
HD-B (RJ9)	HD19 PAB9 4×8 DF #1 or 6×6 DF #1	16,735 lb		Hold-down controls; need to design anchor attachment for 21,620 lb
HD-B (RJ2-7)	(2) HD12 (2) PAB7 6×8 DF #1	26,160 lb
HD-B (RJ2-9)	(2) HD19 (2) PAB9 6×10 DF #1	33,550 lb		Hold-down controls; need to design anchor attachment for 21,620 lb
HD-B (RJ2-10)	(2) HD19 (2) PAB10 6×12 DF #1	38,140 lb
HD-E2	HDU2 5/8″ Threaded Rod	2,215 lb
HD-E4	HDU4 5/8″ Threaded Rod	3,285 lb
HD-E5	HDU5 5/8″ Threaded Rod	4,340 lb
HD-E8	HDU8 7/8″ Threaded Rod (3) studs	6,580 lb
HD-E11	HDU11 1″ Threaded Rod 6×6 DF #1	11,175 lb
HD-E14	HDU14 1″ Threaded Rod 6×6 DF #1	14,445 lb
HD-E19	HD19 1 1/8″ Threaded Rod 6×6 DF #1	19,070 lb

Type: (HD-A) SSTB

Condition

• (RJ)Rim Joist
• (CW)Cripple Wall
• (RC)Raised Curb
• (G)Garage Curb

Capacity

• 2: HDU2 w/ SSTB16
• 4: HDU4 w/ SSTB24
• 5: HDU5 w/ SSTB28 (8 inch concrete)
• 8a: HDU8

Type: (HD-B) PAB

Condition

• (R)Rim Joist
• (P)Cripple Wall
• (C)Raised Curb
• (G)Garage Curb

Capacity

1. PAB4
2. PAB5
3. PAB6
4. PAB8

(HD-C) STHD

• (R)Rim Joist
• (P)Cripple Wall
• (C)Raised Curb

Type: (HD-SW) Strongwall HD

1. AB-1

Retrofit Construction

Type: (HD-RA) STHD

• (R)Rim Joist
• (C)Raised Curb

Type: (HD-RB) MST

• (E)Exterior Strap
• (IA)Interior Strap (Joists Parallel)
• (IB)Interior Strap (Joists Perpendicular)
• (F)Furred Wall
• (V)Corner Strap

Type: (HD-RC) Bolted Hold-Down

Wood-to-Wood Connection

Type: (HD-D) CS/MST

1. CS16
2. MST48

Type: (HD-E) Hold-down to Hold-down

1. HDU4

Type: (HD-F) Hold-down to Beam Below

Type: (HD-G) Bent Strap to Beam Below

1. MSTC48B3

Type: (HD-H) Wrapped Strap around Beam