To secure formwork into compacted soil the contractor is using a 2x4 base plate and using #5 rebar driven 16" into the ground to anchor the base plate.
The loading on this will be the horizontal load from wind forces and horizontal forces produced by the uncured concrete and the vertical forces...
I am designing a wall form system for a low wall (less than 8'). I applied the wind force at the top of the form, but the reviewer indicated this force should be applied as if the wind force is triangularly distributed.
The references I have seen all indicate a minimum wind load "applied at...
I am designing formwork for concrete walls and roof of only one-story heights. In doing so I assigned Risk Category 1 since the formwork is a temporary structure.
However the QC reviewer insists that wind loading, even for temporary formwork, must comply with the Risk Category of the...
Greetings:
I am designing a steel beam to support a 16" waterline crossing over a creek. The waterline will be supported by the I-Beam by hangers at 8' OC which I analyzed both ways - point loads and uniform load. The clear span is 72 ft. Because of limited space the contractor can only...
Has anyone in this forum had experience with the Daniel T. Li suite of spreadsheets?
We are considering purchasing a license but have not been able to find reviews on this spreadsheet based suite.
I personally am impressed with a couple of trial versions we have run, but would like to confirm...
Greetings -
We are working on rehabilitating an existing concrete water tank 24'L x 12'W x 10'H constructed in 1998. The tank appears to be in fairly good shape and the owner indicated no leakage prior to it being emptied in 2017.
We want to make sure the tank is OK for recommissioning so...
Greetings:
One of our clients is completing a residential mid-rise apartment project for which most of the parking spaces are in the basement level.
Instead of striping to delineate parking stalls, the developer would like to use reflective raised pavement markers (buttons). The building...
Greetings:
I am designing the structure for a 360’ x 124' warehouse. The structural system consists of pre-cast concrete wall panels and double tees on the roof. The PC DT's are supported by the PC wall panels along the building exterior and by a continuous inverted T beam at the apex ridge...
Greetings Everyone:
This might seem a bit trivial but it's driving me bonkers.
A client is constructing a pump station in a high wind, Seismic Zone E location. The pump station and wetwell are of PreCast Concrete Walls with CIP Foundation, Floor and Roof Slab.
The project QA is insisting...
Greetings and Happy Father's Day to All:
We have been asked to certify a shop drawing for a hoist rail to carry a 5-Ton pump hoist.
The hoist is to be installed in a solid waste pump station and will be "hung" on a double-tee Pre-Cast roof structure.
The DT manufacturer has already certified...
I will start this by saying I believe this is one of those issues in the "Does the CM know anything about construction?" category that consistently pops up in construction.
We have a contractor client who is constructing a wastewater treatment plant with grated walkways over the pump station...
Greetings:
We are currently working with a contractor on the construction of a new wastewater treatment plant facility where we provide consultation, review and certification of shop drawings and provide professional engineering services for the project. One of the current shop drawings we are...
Happy New Year All:
I am designing a sewage lift station with 28' deep walls and liquid level will be maxed out at the 22' depth level. This work is being done for a general contractor who received this task as a change order to their contract. In the drawings provided for the contractor to...
Happy New Year All:
I am designing a sewage lift station with 28' deep walls and liquid level will be maxed out at the 22' depth level. This work is being done for a general contractor who received this task as a change order to their contract. In the drawings provided for the contractor to...
We are working on a project which requires retrofitting to bring the building up to code.
This is a reinforced concrete and CMU building constructed by the U.S. Navy and consists of reinforced concrete footings, floor slab, columns, beams and roof. The walls are reinforced 8" CMU.
One of the...
A client is replacing a modular FRP water tank with another of the same dimensions and capacity. The original tank was supported along its base (including cross bracing) by MC7 c channels sitting atop grade beams (plinth) 3' high. The new tank will sit on MC6 c channels.
The client has asked to...
We have been asked by a client to utilize an open web metal truss system to support a concrete roof slab. Because of architectural considerations the ceiling space is fairly crowded so it appears some A/C ductwork will pass through the trusses.
Does anyone have a good reference of how to...
Greetings All:
A client has requested that we analyze a building design which is topped off with a cast-in-place RC roof. All the loads (vertical and lateral) are born along the exterior walls. The building is 48' x 66'. The face in question (grid line if you will) is 66' long and supported by...
Greetings Everyone -
I have been asked by a client to design a Pre-Engineered Metal building but with CMU parapet walls which are also shear walls. This would normally be a no-brainer except the client would like the steel columns on the exterior of the building so the interior walls of the...
I was asked by a client to provide a design to join two 40' containers for temporary buildings. Our design wind speed is 170 MPH and we are in Category D.
The proposal is to take out one long wall of each container, then join the two together. Sounds simple until you throw in the requirement...
