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1. Three Options forRaised Wood Floor Foundations
Sponsored by the
Southern
Pine Council
Introduction by
Russell Richardson
2. AIA BestPractices
This course is provided by the Southern Pine Council, a Registered
Provider with the American Institute of Architects Continuing
Education Systems (AIA/CES). Credit earned upon completion of this
program will be reported to CES Records for all AIA members.
Certificates of completion are available for non-members for
self-reporting and recordkeeping purposes.
This program is registered with AIA/CES for continuing professional
education. As such, it does not include content that may be deemed
or construed to be an approval or endorsement by the AIA of any
material of construction or any method or manner of handling,
using, distributing or dealing in any material product.
Questions related to specific materials, methods and services
presented in the learning unit should be directed to the Southern
Pine Council upon completion of this program.
3. Copyright
2011, Southern Forest Products Association
This program is protected by U.S. and international copyright laws.
Reproduction and distribution of this presentation without the
expressed, written consent of the Southern Forest Products
Association is prohibited.
4. Learning Objectives
Discuss the concept and design of a raised home with a wood pony
(or stemwall) system
Discuss the concept and design of a raised home with a CMU pier
system
Explain the concept and design of a raised home with a
poured-concrete pier system
List three insulation options for a raised wood floor home
5. Three Homes, Three Foundations
How the houses featured in this course came to be.
6. Learning Objectives
Discuss the concept and design of a raisedhome with a wood pony (or
stemwall) system
Discuss the concept and design of a raised home with a CMU pier
system
Explain the concept and design of a raised home with a
poured-concrete pier system
List three insulation options for a raised-floor
home
7. Pony Wall System
Site Preparation
11. Pony Wall System
Interior spot pads
13. Interior pad
Rebar in bottom
Pony Wall System
3.5-inch extension
14. Pony Wall System
Porch Footing
Forms for footings set
17. Pony Wall System
Anchor bolt strategy
20. Pony Wall System
6-inch PVC sleeve inside grade beam form
23. Pony Wall System
Concrete poured and forms taken down
All wood and debris will be removed
Ready for sand and compaction
24. Pony Wall System
Sand fill inside perimeter grade beam
28. Pony Wall System
Concrete slab poured for cars and storage
Anchor bolts in place. Sloped to drain water off to
perimeter.
29. Pony Wall System
Pony wall
Post
Pony wall and post
35. Bottom plate with sill seal product added
Prevents moisture migration from concrete to plate
Pony Wall System
Need photo here from Roy of bottom plate with sill seal
36. Pony Wall System
Girders lag-bolted on notch in 6 x 6
40. Pony Wall System
Interior girder intersecting with pony wall
Ready for floor joists
41. Pony Wall System
Floor joists
Floor joists installed
45. Pony Wall System
Blocking or bridging for floor joists
Pony Wall System
Cantilevered floor section
49. Pony Wall System
dollars more
Pressure-treated Southern Pine
51. Plywood subfloor
Pony Wall System
Certified Wood Products
SFI Sustainable Forestry Initiative
Pony Wall System
54. Pony Wall System
Laying out walls
56. Pony Wall System
Treated plywood on treated pony wall
59. Pony Wall System
Metal rod for uplift requirements
Lesson Learned:
With double bottom plate and nailing pattern, metal rod not
necessary
60. Utility lines under house
Crawl space provides space to work under house
Pony Wall System
61. Finished home on pony wall system
Pony Wall System
62. Learning Objectives
Discuss the concept and design of a raised
home with a wood pony (or stemwall) system
Discuss the concept and design of a raised home with a CMU/brick
pier system
Explain the concept and design of a raised home with a
poured-concrete pier system
List three insulation options for a raised-floor home
63. Footings for perimeter grade beam
Rebar tied into grade beam
CMU/Brick Pier System
64. CMU/Brick Pier System
Rebar in position
Ready to pour concrete
65. CMU/Brick Pier System
Concrete poured
68. CMU in place
Cells ready to be filled with concrete
CMU/Brick Pier System
69. CMU cells back filled
Rebar in concrete strong to deflect movement
CMU/Brick Pier System
70. CMU/Brick Pier System
Brick pier with rebar
72. Pressure-treated 2 x 8 on CMU pier
Anchor bolt through lumber for hold-down for girder
CMU/Brick Pier System
73. Pressure-treated 2 x 12 girders
CMU/Brick Pier System
74. CMU/Brick Pier System
Second 2 x 12 girder set in place
Atop 2 x 8
75. CMU/Brick Pier System
Floor joists on top of girders
Anchor bolts attached to hold-down
Lag bolts or lag screws through members
CMU/Brick Pier System
77. Floor system
2 x 6 used for interior pier eliminates need
to notch 6 x 6 to hold girder
CMU/Brick Pier System
78. Sand fill beneath house
CMU/Brick Pier System
79. Perimeter
CMU/Brick Pier System
CMU/Brick Pier System
Extended length OSB
Filled in OSB
Proper nailing and securing for continuous wood member
CMU/Brick Pier System
87. Finished home on CMU/brick pier system
Pressure-treated 1 x 6 boards allow air to flow freely,
but keeps out large pests
CMU/Brick Pier System
88. Learning Objectives
Discuss the concept and design of a raised home with a wood pony
(or stemwall) system
Discuss the concept and design of a raised home with a CMU pier
system
Explain the concept and design of a raised home with a
poured-in-place pier system
List 3 insulation options for a raised-floor home
89. Forms set for exterior grade beam
Spot pads for interior
Poured-in-Place Pier System
90. Placement of vertical rebar critical
Poured-in-Place Pier System
91. Pre-bent rebar secured
Held in place with 3/8-inch rebar
Poured-in-Place Pier System
92. Poured-in-Place Pier System
-inch chamfer strips create angled corners on poured piers
Pier boxes made of plywood and 2 x 4 dimension lumber
Most cost-effective pier system
93. Alternatives are available to plywood boxes
Poured-in-Place Pier System
94. Concrete poured into beam, piers and pads
Concrete finishers at work
Poured-in-Place Pier System
95. Forms removed, site cleaned
Sand backfill in place
Poured-in-Place Pier System
96. Piers with chamfer edges
Anchor bolts in place
Cement mix skimmed to fill imperfections
Poured-in-Place Pier System
97. 2 x 8 plate topped by 2 x 12 girder
Added membrane acts as break to prevent moisture migration
Poured-in-Place Pier System
98. 2 x 6 pieces nailed together for pier
On metal base with galvanized nails
Poured-in-Place Pier System
99. Poured-in-Place Pier System
Hold down lag-screwed to members
2 x 10 joists in place
Another alternative: hang joists from girders
100. Floor joists on top of girders
In flood zones, bottom of floor joists cannot be below flood
elevation
Poured-in-Place Pier System
101. Alternative: Hanging joists
Lowers elevation of building
Poured-in-Place Pier System
102. Floor joists lapped over interior girder
Poured-in-Place Pier System
103. Poured-in-Place Pier System
Standard 4 x 8 OSB
Poured-in-Place Pier System
3 types of porch decking:
5/4 x 6 Radius edge
1 x 4 tongue- and-groove
5/4 x 4tongue-and- groove
Note: KDAT (kiln dried after treatment) must be primed and painted
before installation
Treated Southern Pine porch decking
105. Finished home on poured-in-place piers
Poured-in-Place Pier System
106. Learning Objectives
Discuss the concept and design of a raised home with a wood pony
(or stemwall) system
Discuss the concept and design of a raised home with a CMU pier
system
Explain the concept and design of a raised home with a
poured-concrete pier system
List 3 insulation options for a raised-floor home
107. Fiberglass Batts
Used R-30, or 9 inches of insulation in 2 x 8 joists, Kraft paper
UP against subfloor
Wire mesh across bottom of joists to hold it snug to subfloor
Insulation Options
108. Insulation Options
Spray foam
Rigid foam sheathing
2 thick foil-faced polyisocyanurate
109. Closed-cell spray foam
Insulation Options
Closed-cell (rather than open-cell) preferred for hot, humid
climates
110. Learning Objectives
Discuss the concept and design of a raised home with a wood pony
(or stemwall) system
Discuss the concept and design of a raised home with a CMU pier
system
Explain the concept and design of a raised home with a
poured-concrete pier system
List three insulation options for a raised wood floor home
111. For more information:
SouthernPine.com