Fieldwork No. 31
Good Morning Class. We have poured concrete on 4 columns on Dec. 4 and today Dec. 6, 3 columns. The construction plans normally have General Notes to give details on the materials and its properties and design parameters.
f'c = yield compressive strength of 4,000 psi concrete for columns, beams and suspended slab, while 3,000 psi for the footing and grade slab.
fy = yield tensile strength of Grade 40 (ksi) steel bar - 40,000 psi for 10mm diameter and 12mm diameter.
While the concrete is tested for its compression wherein we collect cube or cylinder samples, the steel bar is tested for tension. Samples of 10mm diameter and 12mm diameter steel bar will be taken from a batch of deliveries and then taken to the testing center. The device will clamp on both ends of a piece of steel bar and pull it slowly apart until it snaps.
In analyzing the reinforced concrete, although the steel has considerable compressive properties, the concrete will bear the compression while the steel, tension, thereby giving a safety allowance.
Fieldwork No. 32
Good Morning Class. We have started pouring at our wall footing as you can see above. We will connect the shear wall composite to the column at A2 so that the shear wall will bear the shear and the bending forces.
As you can see, there will be 3 stages of concrete pouring at the shear wall. 1 is the terraced wall where will cast our 2 stair risers so that it will be supported on that side and 3 the rest of the shear wall. Imagine 150mm of hardened concrete with 4000 psi strength. Those mma guys chop 25mm (1 inch) of concrete hollow blocks with 1000 psi strength. However striking a mortared wall is ridiculous as it will break your hand.
The stairs will be designed as a one-way slab.
We will lay the hollow blocks above the Finish Floor Level FFL.
Fieldwork No. 33
Good Morning Class. The concrete pouring continues as illustrated above.
We have pulled the dowel and straightened it out to splice with the horizontal bars. The starters of the vertical bars on the wall footing will be 2.5m and 3.5m dowels cut from 6m-long steel bars and will be installed alternately.
I am working on my shear wall and stair design. I consider it as a cantilever beam. That is how you transition from strength of materials to designing. You design structures to withstand shear and bending (flexure) moments. Analyze 1 meter strip of slab and wall. Say 12mm diameter bars spaced at 200mm for the vertical bars and 400mm for the horizontal bars. I still have to check though. Obviously i am not much of a structural designer. When i was young i met this lady in an interview. We are both applicants. We chatted and i gather she designs houses but she is not a registered engineer. She talks to registered or licensed engineers to stamp their seal on the plans. I was on the other hand was a licensed engineer but i know shit about design. I should have told her, Hey i have a license, teach me how to design. We can trade. Anyway that was 20 years ago. I'll get my textbooks and design this shit. I used to eat design for breakfast. I am exaggerating. I guess i have to take the refresher course in Besavilla Review Center. I learned a lot from the Cebuano instructors there. My favorite is the Design instructor. He says "In your imagination, anything is possible."
Good Morning Class. We have poured concrete on 4 columns on Dec. 4 and today Dec. 6, 3 columns. The construction plans normally have General Notes to give details on the materials and its properties and design parameters.
f'c = yield compressive strength of 4,000 psi concrete for columns, beams and suspended slab, while 3,000 psi for the footing and grade slab.
fy = yield tensile strength of Grade 40 (ksi) steel bar - 40,000 psi for 10mm diameter and 12mm diameter.
While the concrete is tested for its compression wherein we collect cube or cylinder samples, the steel bar is tested for tension. Samples of 10mm diameter and 12mm diameter steel bar will be taken from a batch of deliveries and then taken to the testing center. The device will clamp on both ends of a piece of steel bar and pull it slowly apart until it snaps.
In analyzing the reinforced concrete, although the steel has considerable compressive properties, the concrete will bear the compression while the steel, tension, thereby giving a safety allowance.
Fieldwork No. 32
As you can see, there will be 3 stages of concrete pouring at the shear wall. 1 is the terraced wall where will cast our 2 stair risers so that it will be supported on that side and 3 the rest of the shear wall. Imagine 150mm of hardened concrete with 4000 psi strength. Those mma guys chop 25mm (1 inch) of concrete hollow blocks with 1000 psi strength. However striking a mortared wall is ridiculous as it will break your hand.
The stairs will be designed as a one-way slab.
We will lay the hollow blocks above the Finish Floor Level FFL.
Fieldwork No. 33
We have pulled the dowel and straightened it out to splice with the horizontal bars. The starters of the vertical bars on the wall footing will be 2.5m and 3.5m dowels cut from 6m-long steel bars and will be installed alternately.
I am working on my shear wall and stair design. I consider it as a cantilever beam. That is how you transition from strength of materials to designing. You design structures to withstand shear and bending (flexure) moments. Analyze 1 meter strip of slab and wall. Say 12mm diameter bars spaced at 200mm for the vertical bars and 400mm for the horizontal bars. I still have to check though. Obviously i am not much of a structural designer. When i was young i met this lady in an interview. We are both applicants. We chatted and i gather she designs houses but she is not a registered engineer. She talks to registered or licensed engineers to stamp their seal on the plans. I was on the other hand was a licensed engineer but i know shit about design. I should have told her, Hey i have a license, teach me how to design. We can trade. Anyway that was 20 years ago. I'll get my textbooks and design this shit. I used to eat design for breakfast. I am exaggerating. I guess i have to take the refresher course in Besavilla Review Center. I learned a lot from the Cebuano instructors there. My favorite is the Design instructor. He says "In your imagination, anything is possible."
That's Right.
ReplyDeleteAll structural drawings must be follow National building Code of your countries. A civil engineer will be must know that Structural Design Criteria and Minimum Requirements for build structure. Other wise failed the structure.