By Edited by Michael J. Casey, Girum S. Urgessa, Visit Amazon's Michael J. Casey Page, search results, Learn about Author Central, Michael J. Casey,
Rebar Cage building and protection: top Practices provides instructions for the secure dealing with of metal reinforcing-bar (rebar) cages during the layout, fabrication, and erection strategy. the focal point is on rebar cages used for big, cast-in-place concrete columns in quite a few settings, together with bridge piers, increased road sections, and high-rise structures. those cages are inherently risky, often held jointly by means of tie-wire on my own. they're not easy to manufacture, to raise from the horizontal to the vertical place, and to aid within the transitority situation until eventually concrete is solid. Engineered transitority aid structures, comparable to bracing or cable-guy platforms, can mitigate the instability of status rebar cages and withstand lateral quite a bit, making sure higher defense for the iron employees tasked with hiking the cages. themes comprise:
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Virginia Department of Transportation. This page intentionally left blank Index Page numbers followed by/and t indicate figures and tables, respectively. AISC Steel Construction Manual 21 anchor blocks, in temporary support systems 18, 18/j design of 2223 ASCE Policy 424 11 ASCE Standard 37-02 16-17 construction 9f, 12; pre-lift operations 9f, 11; structural (permanent) design 9-10, 9/j temporary condition 9f, 12, 21 Design-Build/Design-Bid-Build projects 8 best practices 4 best practices checklists: fabrication 27-28; permanent condition 32; permanent design 27; pre-lift and lift 28-31; temporary condition 31 bracing, in temporary support systems 21 environmental loads 17, 17t erection and fitting forces 17 California 1, 8 CalTrans 6, 8, 17 change: guy wires and 25-26; organizational management and 15 "clotheslining" 18-19 communication, need for 14-15 Concrete Reinforcing Steel Institute (CRSI) 2 construction (live) loads 17 construction engineering 16-26; change to support system 2526; recommendations vi; rigging and lifting 25; temporary support systems 16-19, 17t, 18/ 20/21-23, 24t, 25 contractor size, policies and 8 dead loads 16 design and construction process 812; fabrication 9f, 10-11; geographic variations 8; lift operations 9f, 11; permanent fabrication 1; best practices checklist 27-28; in design and construction process 9f, 10-11; responsibility matrix 14/ Fisk, E.
The following checklist is recommended before the column erection work: 1. Have you completed a Job Hazard Analysis? 2. Establish who will direct the crane operator; determine if hand signals or radio will be used to communicate. 3. Have all guy lines & braces (if required) been installed on column prior to erection? Ensure guy lines & braces are easily accessible without the need to climb the column. Check cable clamps. 4. Notify contractor and other subs that all guying & bracing only to be removed by Harris personnel.
9. What access is available for crane or forklift? Is it adequate? 10. Check weights of lifts; is it the same as your pre-plan procedure? 11. What are your factors of safety to crane, rigging? 12. What is the dowel pattern? Are the dowels the correct height? Are they in the correct location? 13. What rigging are you going to use? What rigging do you have? 14. Check size of rigging. Do you require a strong back or spreader? 15. What rigging blocks and/or special rigging are required? (Snatch blocks, shackles) 16.