Project Spreadsheets to BS 8110 & EC2 REINFORCED CONCRETE COUNCIL

Client Advisory Group Made by Date Page

Location 1st floor - corner panel 2 to 3: B1 to D - 28-Feb-2014 -

2-WAY SPANNING INSITU CONCRETE SLABS to BS 8110:1997 (Table 3.14) Checked Revision Job No

Originated from RCC94.xls v2.1 © 1999-2003 BCA for RCC

DIMENSIONS MATERIALS STATUS

short span, lx m 5.29 fcu N/mm² 25 gc = 1.50 2 3long span, ly m 7.44 fy N/mm² 460 gs = 1.15

h mm 150 Density kN/m³ 24 B1Top cover mm 20 (Normal weight concrete) Plan

Btm cover mm 20

LOADING characteristic EDGE CONDITIONS

Self weight kN/m² 3.60 Edge 1 C C = Continuous

Extra dead kN/m² 1.50 Edge 2 C D = Discontinuous Ly = 7.435 m

Total Dead, gk kN/m² 5.10 gf= 1.40 Edge 3 C

Imposed, qk kN/m² 2.50 gf= 1.60 Edge 4 C DDesign load, n kN/m² 11.14 See Figure 3.8 and clauses 3.5.3.5-6

SHORT LONG EDGE 1 EDGE 2 EDGE 3 EDGE 4 BS8110

MAIN STEEL SPAN x SPAN y Continuous Continuous Continuous Continuous Reference

ßs 0.037 0.024 0.050 0.032 0.050 0.032 Table 3.14

M kNm/m 11.7 7.5 15.5 10.0 15.5 10.0

d mm 125.0 117.0 125.0 115.0 125.0 115.0

k' 0.156 0.156 0.156 0.156 0.156 0.156

k 0.030 0.022 0.040 0.030 0.040 0.030

Z mm 118.8 111.2 118.8 109.3 118.8 109.3 3.4.4.4

As req mm²/m 245 168 327 228 327 228

As min mm²/m 195 195 195 195 195 195 Table 3.25

As deflection mm²/m 285 195 ~ ~ ~ ~

Ø mm 10 6 10 10 10 10

Layer B 1 B 2 T 1 T 2 T 1 T 2

@ mm 275 125 225 325 225 325

As prov mm²/m 286 226 349 242 349 242

= % 0.228 0.193 0.279 0.210 0.279 0.210 %

S max mm 385 357 385 355 385 355 Clause

Subclause (a) (a) (a) (a) (a) (a) 3.12.11.2.7

DEFLECTION

fs 264 228 287 289 287 289 Eqn 8

Mod factor 1.631 Eqn 7

Perm L/d 42.40 Actual L/d 42.30 Asx enhanced 16.1% for deflection control Table 3.10

TORSION STEEL BOTH EDGES DISCONTINUOUS ONE EDGE DISCONTINUOUS

Ø mm 10 X Y X Y

As req mm²/m 195 195 3.5.3.5

As prov T mm²/m 5000 5000 5000 5000

Additional As T req mm² 0 0 0 0

As prov B mm²/m 286 226 286 226

Bottom steel not curtailed in edge strips at free edges

SUPPORT REACTIONS (kN/m char uno) (See Figure 3.10) Sum ßvx = 0.859 Table 3.15

EDGE 1 EDGE 2 EDGE 3 EDGE 4 Sum ßvy = 0.667

B1, 2-3 3, D-B1 D, 2-3 2, D-B1 equations

ßv 0.430 0.333 0.430 0.333 19 & 20

Dead kN/m 11.59 8.99 11.59 8.99

Imposed kN/m 5.68 4.41 5.68 4.41

Vs kN/m 25.3 19.6 25.3 19.6

OUTPUT/SUMMARY

SHORT LONG EDGE 1 EDGE 2 EDGE 3 EDGE 4

PROVIDE SPAN SPAN B1, 2-3 3, D-B1 D, 2-3 2, D-B1

MAIN STEEL T10 @ 275 B1 T6 @ 125 B2 T10 @ 225 T1 T10 @ 325 T2 T10 @ 225 T1 T10 @ 325 T2

ADDITIONAL CORNER 1 CORNER 2 CORNER 3 CORNER 4

TORSION STEEL 2B1 3B1 3D 2D

X direction

Y direction

CHECKS BAR Ø SINGLY MIN MAX GLOBAL

Lx > Ly < COVER REINFORCED SPACING SPACING DEFLECTION STATUS

OK OK OK OK OK OK VALID DESIGN

VALID DESIGN

Edge 1

Edge 3

Edge 2

placed in edge strips

•

Lx =

5.2

88 m

-

Edge 4

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