Part 1 - Making and Testing Concrete Beams (Post tensioned/Non-post tensioned)

This is us constructing 2 beams and cracking them in the concrete lab as part of our internal assessment. Both beams were constructed identical to each other with same amount of reinforcing. Only difference being one was post-tensioned while the other wasn't. We wanted to see the difference in failure between the two. Part 1 - Making the beams Part 2 - Testing the beams

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The Making of 3-D Cavern Background_0001.wmv

The tank size 4x2x2 (453Ltr) Cement mixture is heavily used for the whole project with the concept of fast installation and easy removal. The Background consists of 3 sections; 2 detachable floating modules and 2 sinking rocks. Each section is individually constructed with steel reinforced concrete columns and beams to form backbone. Filter tubes, inlets and air tube are all encased in concrete. The right and left sections are neutral buoyancy wedged tightly in between top and bottom braces of the tank while the middle section is made to float vertically. To ease handling, installation is carried out in the tank fill with 85% water.

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6 Easy Steps in Making Your Own Deck

After planning and getting the materials needed, these are the steps in making a deck: attach ledger, protect ledger, set up footings, establish post the bases and side rim joists, install the front rim and interior joists, then attach decking.

Making your own deck can be a challenging task. You must first have a concrete plan to which enables you to keep track on the progress of your work, and to find the right materials needed for the job. If you don't want to seek professional help in making a deck, you can follow these steps to do the work your way.

Attach ledger

Clear up building's trim to at least a foot above the ground where the ledger will be place, cover it with a water-proof membrane afterward. Mark the position of the ledger, then cut a 2 inch-wide, then 1 inch-thick wooden spaced every 2 feet of ledger, align it with the tops of the spacers then fasten it to the wall with a lag screw of a 16d nail. Drill a 33/8-inch hole into the ledger and through the rim joist for every space in a zigzag manner. Insert a lag screw in each hole then fasten it against a washer.

Protect ledger

Take a strip of a self-adhering waterproof membrane 6 inches wide and about the same length as the ledger then fold it lengthwise forming a right angle, apply it over the ledger. Cut a strip of a flashing with the same dimensions as the waterproof membrane, fold it in a manner like the membrane then place it over it. Place nails through the flashing's top edge every 8 inches. Using joist hanger nails, fasten double joist hangers at both ends of the ledger.

Set up footings

Install batter boards and mason's strings and establish footing location and outside perimeter. Mark each location, then remove the strings. In each a footing location, make a hole that is wide and deep enough to hold the footings. Reading the manual's instructions, install the footing and pier.

Establish post the bases and side rim joists

Install a post base above a pier in a position that is not in the joist hanger's way then mark the location. Remove post base then drill into the pier, place the post base again then insert an anchor bolt, tighten it. Take pressure-treated 2x stock for the rim joists and beam, glue them with an adhesive then nail it together with 12d nails with a space of 16 inches. Place a rim joist into the hanger at every edge of a ledger, repeat with other side joist.

Install the front rim and interior joists

Mount concealed-flange double joist hangers on the edges of the front rm joist's inner 2xs. Insert the inner 2xs into the post bases. Insert a side rim joist in a front hanger then square the corner,then secure it to the posts bases using hanger nails, repeat on the other side. Fit a face-mounted double joist hangers for beams every 8 feet on the center. Finish the doubled front rim by gluing the outside 2xs to the inner ones. Place 2x joist hangers on the beams at least 16 from the center, then fit the joists through the hangers.

Attach decking

Get trim boards and nail it to their outside faces with 2 stainless finish nails, miter joints on the corners. Get the distance from the wall to the outside of the trim board then add about an inch for overhang. Cut the deck boards using those measurements. Brush polyurethane marine sealant on the edge of a side rim joint, then lay a straight deck board, securing it with a finish nail. Squeeze 8d finish nails into the joists along with the top board to maintain uniformed spacing. Place again an adhesive on to each joist, then repeat the laying and nailing process.

It might be hard work, but it's much more satisfying to see the final outcome that was done by yours truly.

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Bungee Video Forward Jump

I decided I had to do something crazy for my bday since I haven't in a while. It was time to bungee jump!! I had always wanted to since I went skydiving; jumping out of the plane was like jumping into a picture. There was simply no fear because depth perception does not work at that height! This time though, I was determined to do something that might make me crap my pants. Walking out onto the bridge, I noted the creakiness of the planks which had gone into disrepair. There were gaps between the walkways that lined the edges through which a small child could easily wander into and fall to their death. I looked at the pictures of the bridge and knew there was water underneath, so if the cord snapped it couldn't be too bad right? Well, it's the end of summer. The water was only inches high, revealing the rocks below. As I walked toward the van housing the bungee gear, I heard an exuberant "SHIT!!" followed by a sound which could have easily been a sheet of plywood slamming into concrete face-to-face, or a woman meeting her final fate against the unforgiving surface of a boulder below. But no, it was nothing more than the multiple bungee cords snapping taught at the trough of the jump, producing an effect much like thunder. An employee approached me and made me sign away how I wanted to die: open casket? No. Cremation? Yes. Heart problems? Dude, I'm a biker. Returning the passport to our deaths, my fellow jumpers listened to how we were going to ensure our own safety. "Don ...



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