Product Brochure

(
800
)
999-5099
strongtie.com
© 2018 Simpson Strong-Tie Company Inc. • P.O. Box 10789, Pleasanton, CA 94588
This flier is effective until December 31, 2020, and reflects information available as of January 1, 2018.
This information is updated periodically and should not be relied upon after December 31, 2020.
Contact Simpson Strong-Tie for current information and limited warranty or see strongtie.com.
F-C-MPB88Z18 1/18 exp. 12/20
Installation
• Use all specified fasteners (included).
• Install MPBZ before concrete is placed
using embedment-level indicators and form
attachment holes.
• After concrete has cured, remove plastic tabs
prior to placing post.
• Place post on internal tabs 1" above top of
concrete.
• Install Simpson Strong-Tie
®
Strong-Drive
®
SDS
Heavy-Duty Connector screws, which are
supplied with the MPBZ. (Lag screws will not
achieve the same load.)
• Concrete level inside the part must not
exceed ¼" above embedment line to allow
water drainage.
• Annual inspection of connectors used in
outdoor applications is advised. If significant
corrosion is apparent or suspected, then the
wood, fasteners and connectors should be
evaluated by a qualified engineer or inspector.
For more information, please visit
strongtie.com/mpbz.
SIMPSON
Strong-Tie
®
Embedment Line
S3
S3
S3
S3
S2.5
S3
S3
Embedment Line
SIMPSON
Strong-Tie
®
S3
S3
S3
S3
Templates hold
the MPBZ in place
(MPB44Z shown)
Templates can be
attached to the
MPBZ (MPB66Z
shown)
1. Loads may not be increased for short-term loading.
2. Higher download can be achieved by solidly packing grout in the 1"
standoff area before installation of the post. Posts bearing on grout must
be naturally durable wood, preservative-treated wood, or installed with a
moisture barrier between the post and grout. Allowable download shall
be based on either the wood post design or concrete design calculated
per code.
3. Concrete shall have a minimum compressive strength, f'
c
= 2,500 psi.
4. Tabulated rotational stiffness accounts for the rotation of the base
assembly due to deflection of the connector, fastener slip and post
deformation. Designer must account for additional deflection due to
bending of the post.
5. Multiply tabulated Seismic and Wind loads by 1.4 or 1.6 (1.67 for 2015
IBC) respectively to obtain LRFD capacities.
6. In accordance with IBC Section 1613.1, detached one- and two-family
dwellings in Seismic Design Category (SDC) C may use “Wind and SDC
A&B” allowable loads.
7. Foundation dimensions are for MPB anchorage only. Foundation design
(size and reinforcement) by Designer.
8. For loading simultaneously in more than one direction, the allowable
load must be evaluated using the following equation: (Design Uplift/
Allowable Uplift or Design Download/Allowable Download) + Design
Moment/Allowable Moment + Design Lateral/Allowable Lateral ≤ 1.0.
9. Tabulated load values may be used for rough sawn lumber or larger
size posts without reduction factors. Rough-size and larger-size posts
shall be planed uniformly on all four sides such that center line of post is
concentric with the center line of MPBZ.
Allowable Load Table
Model
No.
Nominal
Column
Size
Dimensions
(in.)
Simpson
Strong-Tie
SDS
Screws
Concrete Allowable Loads
Wood Assembly
Allowable Loads (DF/SP)
Rotational
Stiffness
K
(in.-lb./rad.)
Uplift
(lb.)
Lateral F
1
(lb.)
Moment M
(ft.-lb.)
Download (lb.)
W
1
/
W
2
D H
Non-
Cracked
Cracked
Non-
Cracked
Cracked
Non-
Cracked
Cracked (100) (160)
Wind and Seismic Design Category A&B
MPB44Z 4x4 3 9/16 7 ¼ 7 ¼ (16) ¼ " x 2 ½ " 4,900 3,990 1,825 1,280 1,410 985 6,240 6,410 2,510,000
MPB66Z 6x6 5 9/16 7 ¼ 7 ¼ (24) ¼ " x 2 ½ " 5,815 5,815 3,545 2,480 2,800 1,960 9,360 10,855 3,950,000
MPB88Z 8x8 7 9/16 7 ¼ 7 ¼ (36) ¼ " x 3" 9,945 6,960 7,945 5,560 4,160 2,910 15,120 19,230 7,776,000
Seismic Design Category C–F
MPB44Z 4x4 3 9/16 7 ¼ 7 ¼ (16) ¼ " x 2 ½ " 4,785 3,350 1,535 1,075 1,180 830 6,240 6,410 2,510,000
MPB66Z 6x6 5 9/16 7 ¼ 7 ¼ (24) ¼ " x 2 ½ " 5,815 5,815 2,980 2,085 2,055 1,645 9,360 10,855 3,950,000
MPB88Z 8x8 7 9/16 7 ¼ 7 ¼ (36) ¼ " x 3" 7,420 6,100 6,965 4,875 3,470 2,550 15,120 19,230 7,776,000
MPB88Z
Trim
attachment
4 places
SIMPSON
Strong-Tie
®
Form attachment
36 - SDS1/4x3.0"
Use & Warnings:
strongtie.com/info
Trim
attachment
4 places
S2.5
S2.5
S2.5
S2.5
S2.5
S2.5
S2.5
S2.5
S2.5
S2.5
S2.5
S2.5
S2.5
S2.5
S2.5
S2.5
S2.5
S2.5
F
1
M
F
1
M
6" min. sidecover
for MPB88Z
5" min. sidecover
for MPB66Z
4" min. sidecover
for MPB44Z
6" min. sidecover
for MPB88Z
5" min. sidecover
for MPB66Z
4" min. sidecover
for MPB44Z
Typical MPB88Z
Installation
(other sizes similar)
MPBZ Moment Post Base