BEFORE THE ARCHITECT – CUSTOM HOME DESIGNING BACKGROUND – HOUSE DESIGN ARTICLES
ALL ABOUT HOUSE FOUNDATION PROBLEMS and YOUR HOME DESIGN FOUNDATION PLAN FOR REINFORCED CORNERS TO SLAB-ON-GROUND
By Before The Architect Copyright 2009
YOU MAY FREELY QUOTE THE AG WITH PROPER ATTRIBUTION
Speak and write the truth. Or don't speak and write. Before The
Architect
QUESTION: WHASSUP WITH HOUSE FOUNDATION
PROBLEMS?
ANSWER: PRETTY NEAR NOTHING WITH A GOOD
FOUNDATION PLAN.
INTRODUCTION
 | Before The Architect
takes a rigorous home foundation design position with respect to reinforced
concrete slabs-on-grade details. | ||
| Herewith, we’ll
present
|
| Slab-on-grade
|
ü Which may occasion slab thickening to accommodate
Comment: Over the years, this designer’s observed that some better builders regularly place 5-6 linear inches for an interior slab-on-grade, a practice which enables this detail by thickening the placements at least in the corner reinforcement sites.
Let’s do the addition math in linear inches:
0.625 for two rebars side-by-side for corner reinforcement
1.250 for 2-#5 rebar atop one another in grid for slab reinforcement
1.250 for 5/8 linear inch aggregate either side of the slab’s bars
1.500 for 2x¾ linear inch cover including the aggregate (worst case)
4.625, or 5 linear inches of thickened slab-on-grade should do it.
| #5 rebar reinforcement as follows |
ü Not less than 6 linear feet in length
ü Perpendicular to the control joint
ü With not less than 3/4 linear inch plus aggregate size coverage at the butts and
ü At 45° to the corner
| At each exterior
corner shall have lain at mid-depth
|
ü Not less than 6 linear feet in length
ü Pointed evenly into the corner
ü With not less than ¾ linear inch plus aggregate size coverage at the butts
| Except that these reinforcements shall (decreasing order of preference) |
Ø Except for crossing of smaller, makeup pieces in articulated perimeters
| Failing which,
these reinforcements
|
Key to abbreviations: ; CVR=COVER; EL=ELEVATION (VARIOUSLY SOG TOP OF FACE:FOUNDATION WALL TOP OF FACE, SO LABELED, OR FOUNDATION WALL TOP OF FACE TO FIRST FLOOR LEVEL); FOH=FRONT OF HOUSE; FIN=FINISH; LF=LINEAR FEET; REINF=REINFORCED; RR=REBAR; SOG=SLAB-ON-GROUND; TYP=TYPICAL
Comment: The illustration Home Foundation Plan, Corner Reinforcements, Plan View is a circled part from one of a group of foundation plans ,the purpose of which illustration is to offer several solutions to corner reinforcements, some of which solutions are proscribed by control joint layouts depicted. The angled features are the rebars. The squared lines on the interior are contraction joints. Darkened rectangles are pilasters running from footing top of face to slab-on-ground bottom of face. Little squares are washers for barely discernible anchor bolts at their centers. Dashed lines are control joints. Crossing bars on the right are grade beams, supported at their junction by a pier, or pedestal, in hatch.
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