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Masonry Wall Foundation The majority of structures completed in the first three approved phases of the Tug Forie V alley project were raised on reinforced masonry wall fowxlations, The deci- sion to use this type of fOWldation was based upon the architectural styles of structures located in those project areas and the increased support strength needed in higher flood water velocity locations. Nonnally, existing fOWldations and footings on eligible structures were deteriorated due to repeated flooding or unsuitable as a base for the new walls due to poor con- struction. For this reason, most if not all portions of the existing footing and fOWldation walls were demolished during the raising process. Where possible, the existing footing and portions of the existing fowxlation walls were used as a base for the extended masonry wall. The basic design of the reinforced masonry wall foWl- dation (seejigure 2) consisted of a continuous perimeter wall of concrete block (8x8x16 or 8xl2xl6-inch block) resting upon an appropriately sized (12x 18 or l2x24-inch) reinforced concrete footing. The masonry wall contained vertical steel reinforcing grouted into every third cell of the concrete block (see jigure 3). The vertical steel was placed in 2 feet lengths with 12- inch lap splicings, All concrete block cells were grouted solid below grade and block sealer was applied to the exterior block face below grade to prevent moisture pen- etration. The exterior surface of the block was painted with a coating of block filler and two coats of latex paint (owner's choice of colors). The vertical steel was tied to the footing reinforcing and a continuous bond-beam course positioned near the top of the fowxlation wall, Figure 4 shows the fourth course below the brick face to be the bond-beam course for this structure. Generally, #4 steel rebar was used in the footing, as vertical reinforcing and in the bond-beam course. In addition to the vertical reinforcing, steel reinforcing (standard truss "dur-o-wal") was added to alternating horiwntal mortar joints, Steel anchor bolts were extended in grouted block cells from the bond-1Jeam course to the new sill plate or steel strapping was included in the grouted block cells and attached to theexistingjoists for anchoring the first floor to the new foundation (seejigure 2), In those limited cases where the existing footing was suitable as a base for the new foundation, the existing footing was drilled, new #4 steel reinforcing bars were grouted in, and a strip footing cap was poured on top of the old footing before laying new fowxlation block. A continu- ous grout layer was placed on top of all footings before laying the initial block course. In cases where the structure had an existing below- 6 ~$ Ii 1'--:< 1/2" PLYWOOD EXi..p "" ~ w.u.. t:'XI11>lG 1iEAl'I<R. t;X1~>l6. .)01<'\ fl,YYoa:O ~ WD~fl~ fl<<1lZ. ?\?oP~~ Of ~N"Y ~IL-l-A~ ~1>lJ~\'''>I<, f~of' ~K. W/fM!-K. flLl.1% ANI' ~ PAiN\' eV!;<.\GN ~ \,;""'- N\;W~~~~ :i>11.4- f'LA1'" ~ ftew. W/2 #+ J'Ee5I>.l<. lB"xl6'-jf4-~ 1b~ ~"""L:rO e.:.ro ~@i!o";jo.c.. "'~ CI' j<\ At- \.O()I/E ~.. fl6., '1 "8~~'=-o-WA'; ~ f!!tcNO COUI!SE 4! l~ OI''''4-~W~ LA!' ?I'l.Iie _:C~O~ 'el-lL.L~..... ~"oF (,~~ALl-~ceLL6 8"e.M.O, 6~ 1','&'-hOUNEl-~~ :tN11s~f~ =~"Jbtwp"'; ,;ub'~ "1~..L-~K. LA'-?A~OO<l!<~OO< ~ALAI'l1'C>l ~Clt. -aca.' ..1'<lll1' f EN. fl!':?r 'fN-E fo!!wN eiX)e. ~ A ~N& .....,.,,:..<ll,. r :~.,',~:.:.' ~: ~ '.~'. I ... '.' '. ~"'. .J!'c.WS!. l'~cf ~: :.,~:' .:~~.~''', L ..."...... ....'lII. t 8-...._.. tcN11 """"" ~Q'~ Agure 2,-Typlcal Wall Section +4. !Ilff '(:.'.- , Agure 3,-Relnforced Masonry Wall Foundation