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  • Users: Deener
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  1. Deener

    Needle Beam and New Opening in Ex. Block Wall

    Hi all, Looking into shoring up some 10" wide block wall (running bond) for a new opening. We are installing the new W8x31 lintel beam. It's an 84" wide opening in a wall that supports OWSJs (4' o.c.) on one side only (i.e. other side has joists running parallel). See drawing below (not to...
  2. Deener

    Points of beam support restrained against rotation

    Hi all, I'm evaluating an existing pit floor for allowable forklift tire loading. This floor has been in place for quite some time. See the drawing below. I want to focus on the W10x49 beams with a midspan of 10'. Let's also ignore the cope at each end of the W10 for now. My concern is the...
  3. Deener

    Lateral Loading for Fall Arrest Gantry Beams

    Hey guys, I'm designing a stand alone structure that supports a fall arrest system. It's inside a tractor trailer factory where workers walk atop tankers to perform maintenance. The company needs trolley beams overhead two adjacent bays that the workers can connect to for fall arrest. Top of...
  4. Deener

    Eaves beam in LFRS in a Portal Frame Steel Building

    Hey guys, Working in a post disaster category steel portal frame building in Ontario, Canada. We're adding some misc metals to the building which was erected about 10 years ago. While on site and while looking through the drawings, I like to imagine load paths. The building contains portal...
  5. Deener

    Industrial Stair Design as Per NBCC

    Hi All, I'm designing a set of free standing interior stairs which access a mezzanine. Distance from mezzanine to ground level is about 3.4m. The EOR wants the stairs to be freestanding to avoid any point loads on the mezzanine which consists of hollow core slabs. In this case, is it reasonable...
  6. Deener

    Structural Fees - Non Standard OWSJ Analysis

    Hey guys, Looking to get a sanity check on reasonable rates for a structural analysis. I've had a few projects that involve the evaluation of an existing OWSJ for additional loading (i.e. rooftop unit, pipe hangers, etc). Here's a breakdown of what the work involves: 1. Site visit for OWSJ...
  7. Deener

    Evaluation of Top Chord in OWSJ - Limit State of Buckling

    Hey guys, I'm evaluating the capacity of an existing OWSJ and am determining whether or not reinforcement will be required. Client wants to give occupant access to the roof area (additional 4.8 kPa loading). I'm using Skyciv to determine the factored loads in each member. A coworker has me...
  8. Deener

    Eaves Connection Detail in Steel Portal Frame

    Hi All, Currently exploring different options with the architect for the eaves connections in an exposed steel portal frame. The roof angle is relatively high (about 33 degrees to the horizontal) so the roof angle needs to be followed all the way to the far flange of the column (as opposed to...
  9. Deener

    NBCC - Geometric Requirements of Industrial Stairs

    Hey guys, I'm laying out a set of interior stairs that will provide roof access for maintenance (monthly access for changing filters of some kind). This is a large factory (>600m^2) and the client wants to keep the footprint of the stairs to a minimum. Stairs are preferred over a ladder as the...
  10. Deener

    Rigid Frame Design with Cantilever W beams and HSS Columns

    Hi All, Looking for some opinions on the design below. It’s an outdoor patio which is only connected to the adjacent structure at the top of the three columns in the right side of the picture below (supporting overhanging roof structure). For scale, the platform consisting of wide flange beams...
  11. Deener

    Engineering a Glass Floor Panel

    Hey guys, I'm designing and building my back deck. I've got an opportunity to use a 5' x 6' x 5/8" thick piece of glass that my friend salvaged from a Victoria Secret runway (high five). I have zero experience with the mechanical properties of glass. For those of you with experience, I would...
  12. Deener

    Beam Splice - Welded with Limited Access

    Hey guys, Contractor is requesting to splice a beam for easier installation access. These beams are placed below a slab (grout gap) and are used to support the existing slab for additional equipment (heat exchangers). The contractor has requested the following splice. All fillet welds...
  13. Deener

    Singly Symmetric Compact I Shaped Member Bent About Their Major Axis

    I'm evaluating the flexural capacity of a simply supported 6 1/2" deep Aluma beam with a point load (dead = 170 lbf, Live = 1000 lbf) at mid span (span is 10ft). Assume the beam is braced at end points only. Below is a snapshot of the aluminum beam cross section. Using the dimensions below along...
  14. Deener

    OWSJ Identification

    I have been asked to review the capacity of an existing OWSJ. I have been given dimensions and internal member sizes of the joist but no joist designation. Is there a table I can use to look up the joist designation based on the member sizes? i.e 30" deep, 3/4" square bar, 2 x 2 x 3/8" angle...
  15. Deener

    Shoring Design - Connecting Props (post shores) to Girders (aluminum or wood beams)

    Hi All, We're replacing some columns in the basement of an old building. When the columns are removed, I need to shore up an old 8"x8" wood beam. I can't simply place post shores beneath the wood beam since there needs to be clearance around the columns to pour new footings. So for this...
  16. Deener

    Moment Connection - Beam Bearing on Column Cap Plate

    Hi All, I have been asked to provide a moment connection detail for a pipe support composed of a W8x21 cantilevered beam off a W10x22 column. A325 bolted connection between bottom flange of beam and column cap plate.See image below. Typically when I detail a moment connection, the top flange...
  17. Deener

    Falsework for Column Replacement

    A column on the exterior wall of a warehouse has been hit by a tractor trailer. We are replacing the column and are currently looking into the the requirements for falsework while the column is removed.I have attached an isometric view of my simple 3D model of the partial structure highlighting...
  18. Deener

    Anchorage to Concrete (ACI 318 Appendix D) - D5.3.5 Bearing strength at head of anchor

    My team is designing a group of pre-tensioned anchors. The anchors themselves are basically headed bolts with their threads protruding out through holes in the baseplate above the concrete surface. The nut on these threads is torqued after the concrete cures. To ensure we don't apply too much...
  19. Deener

    AISC Section J2.2b - limitations on fillet welds

    Hey guys, I'm checking the strength of a fillet weld used to connect an end plate to HSS in a pin connection (HSS is diagonal cross bracing for a frame). I have uploaded a snapshot of the connection. To increase weld length and to help with shear lag, we have added a stiffener around the...
  20. Deener

    AISC Steel Construction Manual - J10 - Flanges and webs with concentrated forces - stiffeners

    Hey guys, I'm designing a simple frame. Each connection is designed as a full moment connection. I have checked all of the cases for which stiffeners may be required and it appears they are not (J10.1 to J10.9). Deformations in the frame are to be kept to a minimum. I would imagine that adding...

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