Bandula Prasad’s Post

CEN/TC 250 Working Group 5 Membrane structures is working on the conversion of the CEN/TS 19102:2023 ‘Design of tensioned membrane structures’ into an EN Eurocode, and in parallel, develop a draft document on execution rules to support the design provisions specified in the Technical Specifications. Comments on the TS 19102 can be sent to marijke.mollaert@vub.be. #eurocode #membranestuctures

Bridge 441 UP: 170 PRCs in terminal tangent TTP2 to Abutment A1 are aligned with A1-A2 alignment Bridge 441 UP is a 5 x 9.14m steel girder in BBK-LKO. During the total station survey, the Prism pole was placed at the left side inner rail head (left gauge face or running face) Data was taken for points on the bridge proper and stations between A1 and TTP2. TTP2 of the curve is approximately 170 PRCs behind A1. When the A1-A2 alignment was extrapolated backward, it was found that TTP2 was misaligned to the left by 186mm. Other stations between A1 and TTP2 are also misaligned to the left by smaller values. Ideally, TTP2 and all points between TTP2 and A1 must lie on the same line as A1-A2. The ideal solution demands that TTP2 be slewed to the right by 186mm. curve had 18 stations in this case. The ideal positioning of Station No. 17 can be found by knowing the current location of S.N. 17 w.r.t. the A1-A2 line in AutoCAD and the y-ordinate of the cubic parabola for x = 10. where y = x^3/6RL; where y is the y-ordinate w.r.t. the terminal tangent, x is the longitudinal distance from TTP2 in meters, R is the radius of curvature of the circular portion, and L is the overall length of the transition. In the present case, we have omitted to locate the exact position of stations behind TTP2, like S.N. 17, 16, because the desired slew at TTP2 is already huge. So stations from M10 (minus 10th PRC) to TTP2 will be slewed as per AutoCAD data. A slew of 186mm at TTP2 is assumed to be the maximum slew, and we will linearly taper it out till Station No. 0, which is assumed to be a good point. i.e., to say we don’t intend to disturb Station No. 0. So for every successive station, the slewing value should be reduced by 11. Station No 17 can be slewed to the right by 186-11 = 175mm. Station No 16 can be slewed to the right by 175-11 = 164mm. Mathematically, if such tapering is done where every successive station is slewed by a value 11mm less than slew at the previous station; terminal stations will have a change in their Versines by 5.5 points. Whereas there won't be any change in the versines of intermediary stations. To reduce the change in Versines at terminal stations, we can choose to reduce the value of the reduction factor at Station No 17. and instead of reducing by 11mm, we may reduce 186 by 6mm. So suggested slew at Station No. 17 = 180mm. From station 16 onwards, we can use a reduction factor of 11mm. The tamping machine will slew only 50mm in one run. Overall, 4 runs will be necessary to slew 186mm. And because the tamping machine may not slew by the same value as planned, it is desirable to repeat the survey after every run. For tamping purposes, the total slew is divided into stages where the maximum slew in each stage is less than 50mm. Stage 2 sewing may be executed immediately after Stage 1. However, a fresh Total Station survey and fresh analysis should be done if time permits. https://lnkd.in/gUTtA_93

Basic Concepts of Stability of Structure Credit: theconsrtuctor.org

Fire safety is a non-negotiable consideration when it comes to building system design and component selection. Canadian codes ensure this safety by way of the CAN/ULC-S134. Great self-serve piece to explore what the method is all about and if it is applicable to your product, project, or design.

Day 56: #100daysofcode   #learninpublic   #dsa BST Lecture : Construction BST, Searching ,minValue and maxValue, Inorder Predecessor and Successor ,Deletion in BST POD.

A lesser known clause in IS-456 - Cl.26.4.2.1 Had you seen this before carefully? Comment if you know similar lesser noticed code clauses. #is456 #cover #rebar #column #detail #structuraldetail #civilengineering #iscode

A lesser known clause in IS-456 - Cl.26.4.2.1 Had you seen this before carefully? Comment if you know similar lesser noticed code clauses. #is456 #cover #rebar #column #detail #structuraldetail #civilengineering #iscode

Are you interested in how we install CFRP - The Wonder Material? Watch this video for a quick demonstration. #CFRP #structuralremedialengineering #Sika Concrete Engineering Solutions https://lnkd.in/g4iDv8HX

Basic "QDC" of a residence done by following the NBR-5410

Did you miss this very insightful product review by Engr.Bernaldez II regarding Blocktec AAC Blocks? Don't worry because we're bringing it back to give you more information and ideas on what to expect when you switch to Blocktec AAC Blocks. Watch it here: