Search results for query: *

Hello, I'm designing a reinforced concrete pile for pure tension that is anchoring a thick doubly-reinforced slab mat from uplift. I'm just wondering, is it better to hook the vertical bars from the pile inwards or outwards? It seems like hooking outwards would be better to spread the tension...

Hello, I have encountered this atypical hairpin detail for anchoring pre-engineered metal building frames... I just wanted to get your thoughts on this, if this would be effective at all? The hairpin will be cast in the slab, but it's wrapped around another U-bar that is anchored into the...

Hello, Does the triple span condition in any steel deck catalogue consider patterned loading for the 3 spans or is it typically just uniform distribution? Thank you.

Hello, Would anyone have a catalogue of Westeel-Rosco Steel Roof deck from the 70's or 80's?' I tried contacting SDI but they don't have it. Thank you.

Hello, I am designing a reinforced concrete beam composite with a slab poured separately as shown below. I understand this will require shear interface reinforcement for shear friction to resist horizontal slip. My questions are as follows: 1. Are the horizontal shear reinforcements (in the...

Hello, I'm looking for reference on lateral shear capacity & uplift capacity of the "Broomed" strand connection to cast-in-place cap shown below without embedment for precast prestressed piles. Any help would be appreciated. Thank you.

Hello, A contractor wanted to use fully threaded anchor rods instead of threaded ends only as shown below. I have no concerns regarding the strength & net area of the threaded rod, but I'm not sure about the concrete bonding to the threaded portion. Is it possible that the bonded concrete in...

Hello. I'm looking for a design guide on how to calculate hollowcore diaphragm defleciton assuming it is flexible and simply supported. I can't seem to find any guide in the PCI manual about this topic. Thank you.

I was wondering if anyone has a copy of hollowcore span tables from Con-Force Products in the 1980s? I'm working on a precast building with hollowcore roof slabs supported by precast beams. The originals drawings I received were missing the pages I need to determine the structural capacity of...

Hello, I'm a structural engineer designing a support frame for an evaporative condenser by Imeco which I believe got acquired by York International which then got acquired by Johnson Controls. I needed to figure out the weight of the unit but I couldn't find any information online and the...

Does the shear capacity of a wood to wood connection using wood screws get affected by which way the head of the screw is drilled from? I'm reinforcing the ends of an existing wood joists with a new LVL ply, and I was wondering if it mattered which way the screw is drilled from. It would be...

I have a situation where I have an overhead door jamb right adjacent the free edge of the concrete at a door buck location. Can anyone provide me a reference on how to calculate concrete bearing capacity adjacent the free edge where the failure plane is shearing towards the free edge as shown...

I wanted to check the connection strength of an existing OWSJ with resistance welded web to chord connection as shown below. Can anyone provide a reference (preferably Canadian Code) of how to calculate the strength of the connection? Would the fused area be the only variable here? It seems...

Hello, Does anyone have a copy of the OWSJ Catalog from the Dominion Bridge Company Limited (1970s)in Winnipeg, Manitoba, Canada? I'm working on an OWSJ that has a hat section for the chords, and a round rod for the webs. I pulled the tag on one of the joists but the only info it has is the...

Hello, I'm working on an old building and I observed what appears to be a sheared bolt / damaged base plate supporting the ends of a 112' span x 8' high girder truss. See image below. If this is related to bolt shearing, is it typical to see the white substance around the bolt? I have not seen...

Hello, I'm working on a steel beam reinforcement consisting of a new W-shaped beam welded below an existing W-shaped girder, which looks like this: I'm trying to determine the anchorage force and extension required for partial reinforcement. According to my reference below from the Canadian...

Hello, I am checking a double angle welded connection to a gusset plate. The double angle is a compression web member of a girder truss. Does anyone know if I have to consider shear lag effects when checking the capacity of the member at the connection? Is shear lag critical for tension members...

What is the correct limitation on slenderness of legs of angles for a double angle compression chord of a girder truss? I have attached the relevant tables below. The angles are primarily resisting compressive forces but there are some minor flexural stresses as well. My confusion stems from...

I'm trying to anchor a 6" reinforced concrete slab membrane into an existing 18" concrete slab underneath for remediation purposes. There is a hydrophilic waterstop between the 6" slab membrane and the 18" slab which causes expansive pressures when wet, so I intend to tie both slabs together...

Is there a particular reason why the concrete exposure class C-2 in CSA A23.1 is specifically for unreinforced concrete as specified in the table below? The exposure class was specified in a new buried reinforced concrete reservoir and I'm not sure if it's applicable. The max w/c ratio...