Chuck Brooks, P.E., P.Eng. C&S Engineers

Size: px
Start display at page:

Download "Chuck Brooks, P.E., P.Eng. C&S Engineers"

Transcription

1 Chuck Brooks, P.E., P.Eng C&S Engineers

2 AGENDA INTRO BASICS KEY CONSIDERATIONS DESIGN CONSTRUCTION

3 Questions to be Explored 1. Concrete Tiltup Panels are designed for the erected position and. 2. The min concrete cover over rebar in tilt wall panels is. 3. Wall panel elevations are drawn looking at the (inside / outside) face. 4. Concrete wall panels need to be evaluated for order effects.

4 INTRO COMMON MISCONCEPTIONS Only in the South and West Limited Architectural Options Only for Warehouses Limited to 30 Feet in Height Cannot Have Large Openings Tiltup is Dangerous

5 BASICS Similar to precast but with less restrictions ¾ min cover Mix design should have max ½ coarse aggregate Consider architectural reveals Do not have to transport - Larger panels Can integrate other trades on site Dowels are better protected Thin walls 2 nd order effects Designed for erected position and lifting

6 DESIGN Roles Engineer of Record: Overall building design (vertical and lateral loads) Need to consider lifting and bracing in design Specialty Engineer Lifting and bracing

7 DESIGN 2 nd Order Effects

8 DESIGN Openings Try to keep 24 wide legs Strongbacks OR Reinforced Legs Embedded Conduit or Surface Mounted Future Knockout Panels Consider reveals to identify cut line

9 DESIGN Drawings Plans, sections, and details similar to any other structure Wall Panel Elevations Panel ID From the Inside Looking Out Specifications Masterspec Spec Special Inspections Similar to cast in place concrete Cylinder breaks to determine f c before lifting

10 DESIGN Decisions and Details Joist Pocket OR Joist Angle Deck Angle OR Edge Joist Beam to Panel Panel to Panel Connections Foundation Connection Loading Dock Elevator Pit Wall Panel Elevations Typical Reinforcing Panel Leg Reinforcing

11 DESIGN Joists: Pockets or Plates Pockets: Load closer to centerline of panel More difficult to construct (block outs)

12 - DESIGN Details Joist Pocket

13 DESIGN Joists: Pockets or Plates Plates: Easier to construct Need to keep a close eye on 2 nd order effects

14 - DESIGN Details Joist Angle

15 DESIGN Deck angle connection at side walls Set max spacing of embed plates Does not deflect at wall Full joist space OR Joist right at wall with slotted holes in deck angle Break deck angle at periodic joints

16 DESIGN Deck angle connection at side walls Set max spacing of embed plates Does not deflect at wall Full joist space OR Joist right at wall with slotted holes in deck angle Break deck angle at periodic joints

17 DESIGN Deck angle connection at side walls Set max spacing of embed plates Does not deflect at wall Full joist space OR Joist right at wall with slotted holes in deck angle Break deck angle at periodic joints

18 DESIGN Beam to Panel

19 Panel to Panel DESIGN

20 DESIGN Foundation connections

21 DESIGN FOUNDATION CONNECTIONS

22 DESIGN FOUNDATION CONNECTIONS

23 DESIGN FOUNDATION CONNECTIONS

24 DESIGN Details Loading Dock

25 DESIGN Details Loading Dock

26 DESIGN Details Elevator Pit

27 DESIGN Wall Panel Elevations

28 DESIGN Wall Panel Elevations

29 DESIGN Details Typical Reinforcing

30 DESIGN Details Panel Leg Reinforcing

31 Submittals Site Prep Casting Lifting and Bracing

32 - CONSTRUCTION Submittals Reinforcing Steel Concrete Mix Design Embeds Panel Layout Lifting and Bracing

33 CONSTRUCTION Site Prep Level site is best Crane access Casting plan Casting slabs and bracing footings

34 CONSTRUCTION Casting Inside face up Floor flatness: FF-35/FL-30 Foundation connection detail and pour strip

35 CONSTRUCTION Lifting and Bracing Specialty Engineer Lifting Design: For demolding: DL +H a H a -> Adhesion = q x A contact q = 20 psf oiled steel mold or concrete with bond breaker q = 30 psf finished timber q = 40 psf rough timber For lifting once off of slab: 1.5 x DL Lifting points symmetrical about center of gravity

36 CONSTRUCTION Lifting and Bracing Keep panels to 85k 90k Min strength of 75% f c before lifting

37 CONSTRUCTION Lifting and Bracing Keep panels to 85k 90k Min strength of 75% f c before lifting

38 CONSTRUCTION Lifting and Bracing Temp lateral support against wind and seismic loads Consider in roof diaphragm design Multi- story Roof deck and panels to take all lateral loads OR Have plan for removing braces after floor deck is welded Brace to slab or deadmen

39 Questions to be Explored 1. Concrete Tiltup Panel are designed for the erected position and. 2. The min concrete cover over rebar in tilt wall panels is. 3. Wall panel elevations are drawn looking at the (inside / outside) face. 4. Concrete wall panels need to be evaluated for order effects.

40 Questions to be Explored 1. Concrete Tiltup Panel are designed for the erected position and lifting and bracing. 2. The min concrete cover over rebar in tilt wall panels is. 3. Wall panel elevations are drawn looking at the (inside / outside) face. 4. Concrete wall panels need to be evaluated for order effects.

41 Questions to be Explored 1. Concrete Tiltup Panel are designed for the erected position and lifting and bracing. 2. The min concrete cover over rebar in tilt wall panels is ¾. 3. Wall panel elevations are drawn looking at the (inside / outside) face. 4. Concrete wall panels need to be evaluated for order effects.

42 Questions to be Explored 1. Concrete Tiltup Panel are designed for the erected position and lifting and bracing. 2. The min concrete cover over rebar in tilt wall panels is ¾. 3. Wall panel elevations are drawn looking at the (inside / outside) face. 4. Concrete wall panels need to be evaluated for order effects.

43 Questions to be Explored 1. Concrete Tiltup Panel are designed for the erected position and lifting and bracing. 2. The min concrete cover over rebar in tilt wall panels is ¾. 3. Wall panel elevations are drawn looking at the (inside / outside) face. 4. Concrete wall panels need to be evaluated for 2 nd order effects.

44 For more information: Chuck Brooks, P.E., P.Eng C&S Engineers