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  1. tolind

    welding a built-up section

    I'm trying to design a builtup section to solve an existing problem. I need to increase the moment of inertia for a roof beam for a monorail to be added. I've determined that if I add a 3X1/4" plate to the bottom of a W12X19 I get the properties I'm looking for. I know that I need a lap...
  2. tolind

    industrial exhaust velocity

    I'm finding conflicting information and I would like some varied input. For industrial exhaust what is an acceptable duct velocity. I understand the capture velocity but sizing the ductwork is where my trouble lies. I've hear a max of 2500 fpm all the way to 5000 fpm. I don't want to much...
  3. tolind

    die exhaust suggestions

    I've trying to design a die exhaust system for a plastics manufacturer and I'm coming up against some walls. I've got the industrial ventilation manual and I can not find a section that describes how many CFM I should be exhausting from the area. I'm planning on using a 3X2 canopy hood to...
  4. tolind

    Interior Shading = More cooling???

    I'm looking at the procedure for calculating space design cooling load in Ashrae. For Solar gain - q=A x SC x SHGF x CLF. I understand that and agree with it. My problem lies when I read that charts for interior shading. The Values for "With Interior Shading" are higher than that without...
  5. tolind

    Experience under an Engineer

    I'm in a certain situation and I'd like some advice from professionals out there. I've worked for a small architectural firm for 8 years. Most if this time I was in college obtaining a BS in civil engineering. I trained under their in house engineer that wasn't liscenced. Almost three years...
  6. tolind

    coped beam

    I'm trying to cope a 4 foot section of a floor beam. Where can I find examples, regulations, calculations on how to determine if the beam will be ok? Thanks for any help in advance.
  7. tolind

    built-up section

    When I try to calc the I in the steel manual I don't get close. I'm using the regular geometric formula's but I'm off. What would I be doing wrong.
  8. tolind

    float contact controls

    I'm installing a couple of floats in a process water pit. I need the floats to active a light and turn a pump on. Is this possible with one float? I guess to make it clearer, can you control two seperate items with one float?? Thanks in advance
  9. tolind

    Pump sizing concern

    This pump only does one way. The main is a 6" pipe and the individual to the equipment is a 2 1/2". Supply pressure is pretty critical but I would rather not use a reducing valve. Thanks to the help.
  10. tolind

    Pump sizing concern

    Not working with pipes and pumps all that often I would like someone to verify this. I have a process system that needs 75gpm and 60psi at two seperate points along a system. One point is 90 ft from the pump and the other is 130 ft. The pump sits 15 ft below the outlet points of this...
  11. tolind

    Minimum plate size for joist bearing on masonry

    I'm looking for a rule of thumb more than anything. I've calculated the required size of 6x6 for a joist bearing plate on masonry but everyone tells me that is smaller then they have seen. Does anyone know a general rule of thumb like "don't use less than a 6x10"? Thanks for the help on...
  12. tolind

    cross bracing - steel and masonry

    I'm looking at a situation I don't agree with and want some second opinions. We were contracted to design a mezzanine inside a pre-engineered warehouse building and a attached office. There is a masonry wall with it's centerline hitting the back edge of Their columns. They are now telling me...
  13. tolind

    Column as Conduit???

    Good Discussion. The application is for lights a city canopy for an alleyway, not attached to any buildings. Steel tube is a structural member and the city is, and always has been, worry about teenage kids vandelizing the construction. Due to this my idea was to run the wiring underground...
  14. tolind

    Column as Conduit???

    What about hiding the conduit inside the column? That would take care of the conduit issue and it would still be vandel resistant.
  15. tolind

    Column as Conduit???

    I'm trying to use a building column as a conduit. It's an 8x8 steel tube and the underground conduit would terminate into it. Is this ok? Do I have to have another conduit running inside to shield?? Is there anywhere in the NEC that comments on this?
  16. tolind

    Sheathing to Decrease unbraced length

    Let me explain it another way. Currently I have a exterior wall that is 14 ft tall. With the wind load on this wall section I need to increase the size to 2X8 instead of the 2X6 in all other locations. Now I add a layer of sheathing to the outside. I understand that the sheathing will reduce...
  17. tolind

    Sheathing to Decrease unbraced length

    Howdy all, I have a church that is wood constructioon with a couple of load bearing walls that I need to reduce the unbraced length in. These walls are going to have a layer of sheating on one side and I and trying to find a source that explains the allowable decrease in unbraced length...
  18. tolind

    Michigan Fresh Air Requirements

    When dealing with the required amount of Fresh air a building must have, the size of the unit is getting astronomical. What ways can the fresh air requirements be meet and the HVAC equipment not be huge. I have heard losely of taking 15% of the fresh air and sizing the unit, then just...
  19. tolind

    Reinforced Masonry

    Instead of using a steel column the architect would like to bear on a masonry grouted solid pier. I have the Concrete Masonry Handbook put out by PCA but it doesn't have any information on design procedures of a fully grouted cell. Can anyone direct me to a location that would help? Can it be...
  20. tolind

    low DC voltage Camera system

    I'm thinking of installing a camera system and I have a couple questions. Can power be pulled off a circuit in the area, does this type of equipment usually come with a ac/dc converter, or do I need to run a seperate circuit from the panel to the camera System? If I need to run a seperate...

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