*Subject: Reinforced prestressed concrete - Civil Engineering*Please refer for my attached formula or guidelines solve this problem A one-way both ends continuous slab is to support the moments tabulated. Consider L= 5m. Fc’ = 21MPa andfy = 415MPa. Dead load Moments: +42KN.m at midspan ;-67KN.m at support; Live Load Moment: +40KN .m at midspan; -44KN.m at support. Determine the spacing of the temperature bars. MINIMUM THICKNESS OF NON-PRESTRESSED BEAMSAND ONE WAY SLABS UNLESS DEFLECTIONS ARECOMPUTEDSolid One-Way SlabBeams or ribbedone way slabSimplyGeneral ProcedureSupportedL/20RuL/16=5.One end continuous■ For structural lightweight concrete the values shall be multiplied by(1.65 -0.0005 Wc) but not less than 1.09, where Wc is the unit mass in kg/m³.■ For fy other 415 MPa, the values shall be multiplied by(0.4 +fy/700)PLEASE REFER5. Compute design constantsSpan Length L in millimetersValues given shall be used directly for members with normal density concrete andGrade 60 (415 MPa) reinforcement. For other conditions, the values shall bemodified as follows:Muobd 2L/24L/18.5Design of one way slabGiven: Loads, type of slab, fc,fy, WHIS FORMULA ANDReq'd: t, size and spacing of main bars GUIDELINEStemperature bars1. Determine the minimum slab thickness t using table for minimumthickness of non prestressed beams and one way slab. Thisthickness should be at least 75 mm2. Compute the weight of the slab (this is to be added to the givendead load)3. Calculate the design moment Mu4. Compute the effective depth dm =d = t - covering - ½ bar diameter (minimum of 12 mm)p>PminSolve for As0.85 fc'Both ends continuousL/28p=₁L/211As = pbd6. Solve for the spacing of barsmS =CantileverA1000Awhere : A₁ = area of 1 barUse the smallest of the followingb)3tc) 450 mmL/10L/82mR.fya)S7. Solve for area of temperature barsA₁ = 0.002bt, A₁ = 0.0018bt, A₁ = 0.0018(400)bt/fy8. Solve for the spacing of temperature bars S₁ = ¹¹1000A₁where : A₁ = area of 1 temperature bar (minimum of 10mm dia.)Use the smallest of the followinga) Stb) 5tc)450 mm

A one-way both ends continuous slab is to support the moments tabulated. Consider L= 5m. Fc’ = 21MPa and fy = 415MPa. Dead load Moments: +42KN.m at midspan ;-67KN.m at support; Live Load Moment: +40KN .m at midspan; -44KN.m at support. Determine the spacing of the temperature bars

A one-way both ends continuous slab is to support the moments tabulated. Consider L= 5m. Fc’ = 21MPa and fy = 415MPa. Dead load Moments: +42KN.m at midspan ;-67KN.m at support; Live Load Moment: +40KN .m at midspan; -44KN.m at support. Determine the spacing of the temperature bars

Fundamentals Of Construction Estimating

4th Edition

ISBN:9781337399395

Author:Pratt, David J.

Publisher:Pratt, David J.

Chapter5: Measuring Concrete Work

Section: Chapter Questions

Problem 3RQ: Why is nothing added to the concrete quantities for wastage at the time of the takeoff?

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