\ fonni Qg or excavation operations in order to allow the Ironworker to propeny and efficiently p. lace the reinforcing steel. Bolll ""'WO spbcc<I, u,uolly by lapp11111, wlicn used uh Orizenlal bani on wolls, M1,pcr,1ure 1111d shnok.,ge bars in,labs, or v,,rtical bars extending through bori70!1Ull construel100 Jou,t S-in high walls Md piers. The location and type of splices are shown on the placing drawings. No subsl;. wtion in type or locatioo should bc IUldc witbout proper audl Ority ond specific lnstroetloos u to npplicatioo. The r-rce typcsof spliccurc() lap,(b)medwucal. and (c Jwelded. lbeseare u'1drfi-sc:d in thc-followmg secitons. LAP SPLICES TIM: lcolflh of a lnp splice varies with contrctc Mrtoglh, type of conc;rcto, die yield strengib (grade) of Ibo mnforcing ba J:s, bar size, bar spacing, concrdc cover, and the quantity ot' ties or sin'lll'S-Lap splice lengths a,,; al Wll)'S shown on placing drawings and wm be found either in the details, lap llhm, or in the genen>l notes. Some typical lap splice details are s'-n in rig. 11-19; Olhcr. s are dlown elsewhere in thi J cluptcr. Due 10 clooe spacing of reinforcing ban, it is not always poss,ble to provide lap splices. In-co.-especially on large sitt bll,s. the lengd1 of o lap Splice might be sufficient to mw: another type of splice more economical. Lap splic­ i J!i of #14 and #18 bors is not pcrmitwd by tbe ACI Building Code, c:xccpt in con,p,:<ssion and only to #11 aod smaller bars, which neeessita~ making some type of mechanical or welded splice. The l'. ngineer may specify a parlicur.. type of mechanical splice, bw more often, !he contract documents will provide a choice of types to die Conttlletor. The Fabricator will ncod ID know the type sclccud so that proper end pn,parntion of the reinforcing bars can be made in I. be shop, ifrcquircd. Also, lbc Fabri CSIOr will need to show lap splice details on lhe placing dnwings for use by tho lroowooi<ers. 11-20 Concrete R001foroing Steellnt1ilulo Section 609 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 6-9