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STHD STRAP THE HOLDOWN
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The STHD is an embedded strap tie holdown with higher load capacity
than the HPAHD. The staggered nail pattern helps to minimize splitting.
FEATURES:
- The strap nailing pattern allows for nailing to the edges of double
2x's.
- A slot below the embedment line allows for increased front to back
concrete bond and reduced spalling.
- Strap nail slots are countersunk to provide a lower nail head
profile.
- Rim joist models accommodate up to a 17" clear span without any
loss of strap nailing.
- Coined edges enhance safe handling.
MATERIAL: LSTHD8, LSTHD8RJ -- 14 gauge, all others
-- 12 gauge.
FINISH: Galvanized
INSTALLATION:
- Use all specified fasteners. See General. Notes.
- See Post Tension information on page 19.
- Nail strap from the bottom up.
- Bending the strap 90° to aid wall placement may cause spalling
behind the strap. If the spall is 1" or less, measured from the top of the concrete
foundation to the bottom of the spall, full loads apply. For spalls between 1" and
4" (see illustration), the allowable load is 0.90 of the table loads.
- Where fewer fasteners are used in the structural wood member, reduce
loads according to the code.
- Unless otherwise noted, do NOT install where: (a) a horizontal cold
joint exists within the embedment depth between the slab and foundation wall or footing
beneath, unless provisions are made to transfer the load, or the slab is designed to
resist the load imposed by the anchor; or (b) slabs are poured over concrete block
foundation walls.
- To get the full table load, the min. center-to-center spacing is
twice the embedment depth when resisting tension loads at the same time.
FOUNDATION CORNERS: Nail quantities may be reduced
for less than le corner distance design loads -- use the code allowable loads
for fasteners in shear.
CODE: ICBO 5349.
| Model No. Standard / Rim Joist |
Min Stem Wall |
Strap Length (L) |
le |
Nails |
Avg Ult@ 2000 psi le |
Allowable Loads (133 & 160) |
| Edge Distance |
| Std
Model |
Rim
Joist Model |
1/2"
|
1-1/2"
|
le2 |
1/2"
|
1-1/2"
|
le2
|
1/2"
|
1-1/2"
|
le2 |
|
|
2000 psi
Concrete |
2500 psi
Concrete |
300psi Concrete
|
| LSTHD8/LSTHD8RJ |
6 |
21-5/8 |
35-1/8 |
8 |
24-16d sinker |
5918 |
1695 |
1695 |
1695 |
1825 |
1825 |
1825 |
1950 |
1950 |
1950 |
| STHD8/STHD8RJ |
6 |
21-5/8 |
35-1/8 |
8 |
24-16d sinker |
7167 |
1760 |
2050 |
2345 |
1950 |
2210 |
2385 |
2135 |
2370 |
2425 |
| STHD10/STHD10RJ
|
6 |
23-1/8
|
36-5/8 |
10 |
28-16d
sinker |
10555 |
2035 |
2575 |
3185 |
2610 |
2880 |
3185 |
3185 |
3185 |
3185 |
| STHD14/STHD14RJ
|
6 |
31-5/8
|
39-5/8 |
14 |
38-16d
sinker |
15080 |
3235 |
4220 |
4805 |
3800 |
4295 |
4805 |
4365 |
4365 |
4805 |
| LSTHD8/LSTHD8RJ |
8 |
21-5/8 |
35-1/8 |
8 |
24-16d sinker |
5918 |
1695 |
1695 |
1695 |
1825 |
1825 |
2335 |
1950 |
1950 |
2975 |
| STHD8/STHD8RJ |
8 |
21-5/8 |
35-1/8 |
8 |
24-16d sinker |
7577 |
2370 |
2370 |
3195 |
2370 |
2370 |
3195 |
2370 |
2370 |
3195 |
| STHD10/STHD10RJ
|
8 |
23-1/8
|
36-5/8 |
10 |
28-16d
sinker |
11780 |
2745 |
2745 |
3725 |
2990 |
2990 |
3725 |
3230 |
3230 |
3725 |
| STHD14/STHD14RJ2
|
8 |
31-5/8 |
39-5/8 |
14 |
38-16d
sinker |
17453 |
3885 |
4430 |
5785 |
4160 |
4430 |
5785 |
4430 |
4430 |
5785 |
- 'RJ' after the model indicates STHDs for rim joist applications, e.g.
STHD8RJ.
- STHD14RJ requires 30-16d sinkers, with the (le) load at 133% of 4960
lbs.
- 10d commons or 12d common nails may be used with no load reduction.
- For two pour with 4" slab or less, install STHD14 and
use STHD10 loads.
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