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ESR-2262 I Most Widely Accepted and Trusted Page 7 of 28
<br /> Un-cracked Concrete
<br /> Lammer Drilled
<br /> Y Water DrI
<br /> (D) Saturated
<br /> - -- - -- (WS)---------
<br /> --- -
<br /> (D) (WS)
<br /> ---___-- TIr lmrr
<br /> FIGURE 2-FLOWCHART FOR ESTABLISHMENT OF DESIGN BOND STRENGTH
<br /> TABLE 1b-EXAMPLE ALLOWABLE STRESS DESIGN VALUES FOR ILLUSTRATIVE PURPOSES
<br /> NOMINAL ANCHOR EFFECTIVE EMBEDMENT ALLOWABLE TENSION LOAD
<br /> DIAMETER DEPTH P, k.,.„G a N 4Nda
<br /> ------------ --------------
<br /> d, h,
<br /> - -- (in.) - - (in•) (psi) (-) {-) O (lb) (lb)
<br /> 31e 2'l6 2,500 24 1.48 0.65 4,392 1,929
<br /> 231.. 2,500 24 1.48 0.65 5,471 2,403
<br /> - Sla 311e 2,500 24 1.48 0.65 6,629 2,911
<br /> �I. 3112 2,500 24 1.48 0.65 7,857 3.451-
<br /> lie 3112 2,500 27 1.48 0.65 8,840 3,882
<br /> 1 4 2,500 27 1.48 0.65 10,800 4,743
<br /> 11/. 5 2,500 30 1.48 0.65 16,771 7,365
<br /> For Sl: 1 Ib=4.45 kN,1 psi=0.00689 MPa,1 in.=25.4 mm,°C=(('F)-32)11.8.
<br /> Design Assumptions:
<br /> 1. Single anchor with static tension toad only;ASTM A 193 Grade 87 threaded rod.
<br /> 2. Vertical downward ins4iallation direction.
<br /> 3. Inspection Regimen=Periodic.
<br /> 4. Installation temperature=14-104 OF.
<br /> 5. Long term temperature=80'F.
<br /> 6. Short term temperature=110"F.
<br /> 7. Dry tole condition-carbide drilled hole.
<br /> 8. Embedment depth=h.n,;,,.
<br /> 9. Concrete determined to remain uncracked for the life of the anchorage.
<br /> 10. Load combination from ACI 318 Section 9.2(no seisrnl:loading).
<br /> 11. 30 percent Dead Load(D)and 70 percent Live Load(L);Controlling bad combination 1.2 D+1.6 L.
<br /> 12. Calculation of a based on weighted average: a=1.2 D+1.6 L=12(0.30)+1.6(0.70)=1.48.
<br /> 13. Normal weight concrete:F=2,500 psi
<br /> 14. Edge distance:c„=c,2>cx
<br /> 15. Member thickness.h?h_,,.
<br /> Verify Capacity
<br /> Capacity ACI 313 Formula Calculation 0 �N
<br /> reference
<br /> Steel D.!>.1 N.=nA_Nf. N,=0.3345•125,000 0.75 31.360 Ib
<br /> (_:oncretr-, Lo-�>-2 N,m=k,-(f'ja 5 hof''S M,=24•(2,500)a a•3'1,"'
<br /> 0.65 5,107 Ib
<br /> Bcno D53- N.=xdh.rr,,,,,,v N.=x-314.3'12.1,710 0.65 9.166 lb
<br /> 5,1071b
<br /> concrete breakout is decisive;hence the ASD value will be calculated as -3,451 Ib
<br /> 1.48
<br /> "Design equation provided in Section 4.1.4 as new section ACI 318 D.5.3.9,Eq.(D-16f).
<br /> l�
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