CE306 Example Lab Report

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University of Iowa *

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306

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Civil Engineering

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Apr 3, 2024

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7

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REBAR AND VERTICAL STRUCTURAL COMPONENTS Lab No. 6 CE 306 – Project Management for Civil Engineers Submitted by Section X, Team No. X: Jo Smith Bob Jones Billy Wall January XX, 20XX Iowa State University Department of Civil, Construction & Environmental Engineering
CE 306 | Lab Report #6 Section 1, Team No. X Jan. 17, 2012 Jo Smith, Bob Jones, Billy Wall Table of Contents Introduction ......................................................................................................................... 3 Summary/Quantity Information .......................................................................................... 3 Conclusion ........................................................................................................................... 5 Attachments ........................................................................................................................ 6 Page 2
CE 306 | Lab Report #6 Section 1, Team No. X Jan. 17, 2012 Jo Smith, Bob Jones, Billy Wall Introduction: In Lab 6, students must use the plan sheets to answer questions about reinforcing steel and vertical structural steel components in the DMACC Career Academy. To better understand the types and uses of reinforcing steel and vertical components, the students will define related terms, draw sketches, identify details related to and perform a quantity take off of reinforcing steel. Understanding how to quantify and read details pertaining to reinforcing steel provides students the general knowledge required to then estimate the cost. Reinforcing steel and vertical structural components are often overlooked in the final product of a building or roadway; however, it is imperative the students understand the purpose and design of such materials during the construction phase. While executing this lab, students must also observe common industry practices and standards not spelled out in the notes or specifications, especially while performing the quantity take-off. Summary/Quantity Information: Below are the eight questions with respective answers requested for this lab. Any and all assumptions were recorded in the response to each question. 1. Identify the value of the following loads that the building is designed to withstand: a. Snow Load : The DMACC Career Academy is designed to withstand a snow load of 30 PSF. Reference: Note 1/S0.1 Concrete Reinforcing Steel b. Horizontal Wind Pressure : While designing the structure of the building, a horizontal wind pressure of 20 PSF was factored in. Reference: Note 1/S0.1 Concrete Reinforcing Steel c. Live Load of the Mezzanine in Room 117 : The Mezzanine in the Automotive Technology Lab Room 117 was designed for two different live loads. By the Live Load Key Plan, Note 1 indicates a 100 PSF live load and Note 4 indicates a 200 PSF live load. Reference: S0.3 Structural Loading d. Dead and Live Load of Room 217 : Computer Lab Room 217 has a total, superimposed dead load of 10 PSF per Note 3 on the Live Load Key Plan. There is also a 20 PSF live load for partitions and a 40 PSF live load for classrooms. Reference: S0.3 Structural Loading 2. What is the width of a typical slab control joint? The typical width of a slab control joint used for the DMACC Career Academy is 3/16”. Reference: 9/S2.0 Structural Details 3. What anchors the slab ending at the North wall of the welding gas storage room to the footing below? A #4 180° hook rebar is placed 18” O.C. to anchor the slab to the footing at the given location. Reference: 2/S2.1 and 7/S2.1 Structural Details Page 3
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CE 306 | Lab Report #6 Section 1, Team No. X Jan. 17, 2012 Jo Smith, Bob Jones, Billy Wall 4. How is the North wall at the location referenced in Question 3 anchored to the slab below? What does this stand for? A CFSF Attachment by Manufacturer is used to anchor the North wall of the Welding Gas Storage Room to the slab below. CFSF stands for Cold Formed Steel Frame. Reference: 7/S2.1 Wall Section 5. What components are used to anchor the precast wall to the slab-on-grade and footing below? The Precast Manufacturer makes the connection between the precast panels and the slab-on- grade and footings using embed plates. The design of the embed plates is PL3/8”x12” with (2) ½”x1/6” Headed Welded Studs, (3) per panel. Reference: 4/S4.0 Typical Exterior Foundation 6. Draw and label a 3D, Not-to-Scale, schematic sketch of the base plate anchoring the vertical member supporting the structure above at the exterior curtain wall of the main lobby. Include anchor bolts and all dimensions. Figure 6.1 Base Plate Sketch at Main Lobby Reference: 2/S3.0 and 5/S3.0 Structural Details 7. What size is the steel reinforcing used to support the masonry shown on the structural drawings? What is the layout for this design? All masonry shown on the structural drawings will be reinforced using #5 rebar placed 48” O.C. Reference: Note 1/S1.1 Foundation Plan Page 4
CE 306 | Lab Report #6 Section 1, Team No. X Jan. 17, 2012 Jo Smith, Bob Jones, Billy Wall 8. Estimate the total quantity of rebar that will be required for all footings, foundations, and slab-on-grade. The total quantity of rebar and smooth dowels was 26,101 pounds. To quantify this, it was assumed that waste was not a factor. The typical useful length of the reinforcing steel was calculated to be 17’-0” after laps and splices, assuming 20’-0” stock lengths. Please reference the detailed calculations in the Attachments. Table 8.1 Quantities of Rebar by Diameter Diameter Quantity (LF) Unit Weight (lb/LF) Total Weight (lb) #3 Rebar 856 0.376 322 #4 Rebar 13813 0.668 9227 #5 Rebar 13676 1.043 14264 #6 Rebar 355 1.502 533 #7 Rebar 859 2.044 1755 Total 26101 Conclusion: The reinforcing steel take-off in this lab proved to be very tedious. The detailed drawings depict a schematic layout of the rebar but the pictures did not fully describe the situation, causing us to rely heavily on the keyed notes and the schedules on S0.1 and S0.2. Our group does not have much experience working with rebar so this lab took us longer than expected because we had to draw each condition to ensure we fully understood what was required. As aforementioned, the first lesson we learned in this lab was how to properly use the details provided. The second lesson was intuitively calculating the length and number of each reinforcing member. We knew the stock length of rebar was 20 feet but we had to account for the lap or splice used in each long span, such as the trench footings. An example is the special shallow footings: the #5 rebar requires 1 ½” cover and a 75 bar-diameter splice so the useful length of the 20’ stock piece was approximately 16’ – 1”. Though this lab contained several “tricks” for us to catch on to, we feel we were successful in understanding the basics of a reinforcing steel take-off. Page 5
CE 306 | Lab Report #6 Section 1, Team No. X Jan. 17, 2012 Jo Smith, Bob Jones, Billy Wall Attachments: #3 Rebar Location Detail Quantity (LF) Weight (lb) Auto Lifts 3/S2.1 578 217.33 P1 Detail 1/S2.1 277.67 104.40 Total 855.67 321.73 #4 Rebar Location Detail Quantity (LF) Weight (lb) Stoop Pads 1/S2.0 1229.25 821.14 Stoop Footings 1/S2.0 852.25 569.30 Depressed Slab (Smooth Dowels) 6/S2.0 117.33 78.38 Recessed Walls 11/S2.0 45.5 30.39 Construction Joints (Smooth Dowels) 12/S2.0 241.33 161.21 Window Hook Bar 2/S2.1 212.92 142.23 CFSF Hook Bars 7/S2.1 58.33 38.96 Continuous Bar Under Windows 2/S2.1 134.21 89.65 Continuous Bar Under CFSF Walls 7/S2.1 31.69 21.17 Trench Footings S0.2 9386.41 6270.12 Paint Pit 4 thru 6/S2.1 966 645.29 Elevator Pit 10/S2.0 538 359.38 Total 13813.22 9227.23 #5 Rebar Location Detail Quantity (LF) Weight (lb) Spread Footings S0.2 1131 1179.63 Special Footings S1.1 3625.27 3781.16 Auto Lifts 3/S2.1 234 244.06 Elevator Pit 10/S2.0 590 615.37 Site Utilities 4/S2.0 32 33.38 Thickened Slab 7/S2.0 1002.54 1045.65 Masonry Wall Footings 11/S4.0 506.46 528.24 Footing Steps 2/S2.0 323.75 337.67 Trench Footings S0.2 6231 6498.93 Total 13676.02 14264.09 #6 Rebar Location Detail Quantity (LF) Weight (lb) Spread Footings S0.2 186.67 280.38 P1 Detail 1/S2.1 168 252.34 Total 354.67 532.71 Page 6
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CE 306 | Lab Report #6 Section 1, Team No. X Jan. 17, 2012 Jo Smith, Bob Jones, Billy Wall Attachments : (Continued) #7 Rebar Location Detail Quantity (LF) Weight (lb) Spread Footings S0.2 858.67 1755.12 Total 858.67 1755.12 Grand Total of Rebar (lb) 26100.89 Page 7