Design Criteria And Slab Thickness Draft 2

Mapua University School of Civil, Environmental and Geological Engineering Muralla St., Intramuros, Manila City

DESIGN OF 5-STOREY RESIDENTIAL AND COMMERCIAL BUILDING WITH DECK LOCATION: 638 THOMAS MAPUA STREET, STA. CRUZ, MANILA OWNER: JOE ERIC D. NG

CIVIL ENGINEERING PROJECT 1 CE182-1L / E03

Submitted by: ATIENZA, Rachelle Grace T. MAYUGA, Daniel Jr. R. NAKPIL, Keilah Caryl S.

Submitted to: Engr. Wyndell Almenor

July 24, 2019

STRUCTURAL DESIGN CRITERIA

A. Codes and Standards a) NSCP 2015 National Structural Code of the Philippines 2015 7th Edition b) ASEP Association of Structural Engineers of the Philippines: Pressure Coefficient for Various Parts of the Building c) AISC-05 American Institute of Steel Connections: Specification for Structural Steel Building d) AISC Shapes Database v.15 American Institute of Steel Construction: Steel Members Properties for Truss e) ACI 318-08M American Concrete Institute: Building Code Requirements for Structural Concrete B. Material Strength a) Concrete i. Slab on Grade.………………………….. fc’ = 21 Mpa (3000 psi) ii. Suspended Slabs………………………... fc’ = 21 Mpa (3000 psi) iii. Columns and Beams………………...….. fc’ = 21 Mpa (3000 psi) iv. Footings and Footing Tie Beams……….. fc’ = 21 Mpa (3000 psi) b) Steel Reinforcements i. 12mm diameter bars and smaller……….. fy = 230 Mpa (grade 40) ii. 16mm diameter bars and larger……….... fy = 275 Mpa (grade 60) c) Structural Steel i. Use A36 steel fy = 248 Mpa ii. Structural Steel used on trusses will be connected by weld using E70xx (70 ksi or 480 Mpa) d) Soil Bearing Capacity The soil bearing capacity is 200 kpa as per Western Metro Manila soil bearing data. C. Design Loads a) Dead Loads i. Ceiling Suspended steel channel system……………………… Gypsum Board, 1.4” thick…………………………….

0.1 kpa 0.05 kpa

ii. iii. iv. v. vi.

vii.

viii.

Floor Fill Lightweight concrete…………………………………. Floor Finish Ceramic Tile (20mm) on 13 mm Mortar Bed………… Frame Partitions Wood Studs, 50x100 plastered two sides…………...… Water Proofing Bituminous Gravel Covered……………………...…… Exterior Walls Concrete Masonry Units Full grout spacing 19.6 kN/m3 (density of unit) 200 mm both sides plastered (add 2(0.24))……..….…. Interior Walls Concrete Masonry Units Full grout spacing 19.6 kN/m3 (density of unit) 150 mm both sides plastered (add 2(0.24))…………… Parapet Concrete Masonry Units Full grout spacing 21.2 kN/m^3 (density of unit) 200 mm both sides plastered (add 2(0.24))……….…...

b) Live Loads i. Office………………………………………………….. ii. Roof Live Load………………………………………... iii. Lobbies and ground floor corridors………………….. iv. Basic residential floor area……………………….……… c) Seismic Load Based on NSCP 2015 7th Edition d) Wind Load Based on NSCP 2015 7th Edition

0.15 kpa 0.77 kpa 1.2 kpa 0.26 kpa

3.88 kpa

2.82 kpa

3.97 kpa

1.9 kpa 0.75 kpa 8 kpa 1.90 kpa

SLAB THICKNESS 1.0 Second to Fourth Floor

𝑚=

4.25 5.53

= 0.77 > 0.5 ∴ 𝑇𝑤𝑜 − 𝑊𝑎𝑦

2.0 Fifth Floor

𝑚=

5.53 5.75

= 0.96 > 0.5 ∴ 𝑇𝑤𝑜 − 𝑊𝑎𝑦

3.0 Roof Deck

𝑚=

5.53 5.75

= 0.96 > 0.5 ∴ 𝑇𝑤𝑜 − 𝑊𝑎𝑦

4.0 Minimum Thickness

𝑡= 𝑡=

𝑃𝑒𝑟𝑖𝑚𝑒𝑡𝑒𝑟 180 2(5530)+2(5750) 180

= 125.33

∴ Adopt 130 mm slab thickness