Tabulated values correspond to maximum connector strength without consideration of serviceability.
Designer must check out-of-plane deflections using tabulated rotational stiffness.
Uplift may be linearly interpolated for design moment less than allowable. Designer is responsible for anchorage design.
Tabulated stiffness is applicable for walls up to 38" tall. For taller walls, the Designer must consider additional
deflection due to bending in the studs.
Per IBC 2015 Table 1604.3 footnote f, wind load is permitted to be taken as 0.42 times "component and cladding loads"
for deflection checks. For IBC 2009 and earlier, the factor is 0.7 instead of 0.42.
Allowable Moments have been determined
using ACI 318-14 Chapter 17 anchorage
calculations with the minimum concrete
compressive strength, f'c and slab thickness
listed. Sand-Lightweight Concrete is
abbreviated as 'SLWC', Normal Weight
Concrete is abbreviated as 'NWC'.
Nominal Embedment Depth/Effective Embedment Depth relationships:
- 3/8" Titen HD® in 4" concrete:
2.50" (hnom) / 1.77" (hef)
- 3/8" Titen HD in 6" concrete:
3.25" (hnom) / 2.40" (hef)
- 3/8" Carbon Steel STB2 into 4" concrete:
- 3/8" Carbon Steel STB2 into 6" concrete:
- SET-XP® or AT-XP® Adhesive with
3/8" F1554 Gr. 36 All-Thread Rod in 6"
concrete: 4.0" (hnom) = 4" (hef)
- SET-XP or AT-XP Adhesive with 3/8"
F1554 Gr. 36 All-Thread Rod in 9.5"
concrete: 7.5" (hnom) = 7.5" (hef)
At edge of slab, edge distances are assumed to be 3.0" and 4.0" (1/2 of stud width) as determined for 6" and 8" studs, respectively. 'End distances' are assumed as 1.5 x Min. Edge Distance in one direction and 'N/A' in the other direction. See installation illustration.
At center of slab; edge and end distances are assumed as 'N/A' in all directions at locations away from edge of slab. See installation illustration.
Load values are for a single anchor based on ACI 318-14, condition B, load factors from ACI 318-14 Section 5.3, no supplemental edge reinforcement, ψc,v = 1.0 for cracked concrete and periodic special inspection. Reference ICC-ES or IAPMO-UES evaluation reports for further information.
Load values are based on a short-term
temperature range of 150°F and 180°F for
SET-XP and AT-XP. Long-term temperature
range is assumed to be 110°F for both
SET-XP and AT-XP. Dry hole conditions
are assumed. Other conditions may be
evaluated using Anchor Designer™
Software for ACI 318, ETAG and CSA.
Allowable Stress Design (ASD) values were determined by multiplying calculated
LRFD capacities by a conversion factor, Alpha (α), of 0.7 for seismic loads and 0.6
for wind loads. ASD values for other load combinations may be determined using alternate conversion factors.
Tabulated allowable ASD loads for Wind and Seismic in SDC A & B are based on using wind conversion factors and may be increased by 1.17 for SDC A & B only.
Allowable loads have been divided by an Omega (Ω) seismic factor of 2.5 for brittle failure as required by ACI 318-14 Chapter 17, unless steel failure governs.
Tabulated allowable moments are for MSSC Kneewall Connectors attached to studs with 33 (20) or 43 (18) mil (ga.) thickness. Allowable moment may be increased for MSSC Kneewall Connectors attached to studs with 54 (16) mil (ga.) thickness by multiplying by a factor of 1.16 for MSSC4.25KW and 1.28 for MSSC6.25KW.
Tabulated capacities assume lateral force applied at height of 38" above concrete. Tabulated capacities are based on maximum allowable anchorage loads only. The capacity of the connection system shall be the minimum of the tabulated value and the allowable load value from the MSSCKW Connectors: Allowable Load Tables.