Recent content by chencfp

I am wondering if it is practical for flat roof by using wood material (ie, Wood truss or 2x12 with 3/4” plywood deck, then applying waterproof material and shingle. Where I am able to find a specification or standard for this type application? Thanks.

hokie66, Thanks. We will use 3" gage 18 deck.

Ron, Jike, Thanks. We will use 9' oc span (we use WF beam instead of barjoist), the clear span will be around 8'. Beside the welding (metal deck weld to WF) and metal deck deflection, what other problems I need to concern according to your experiences? Thank again.

Ron, Thank you for your help. I am right now starting to read your provided references. One more question for you. I saw some projects in this area and typical roof span is around 5-ft. Is it adequate to have span at 9-ft (more than 3 spans)if we use thick metal deck (ie, 18 gage deck)? Thank...

Thank you all. The project is in NY. We use metal roof deck on WF beam (flat roof). I don't have any experience for details above metal deck. I saw some project around this area. They use insulation, rubber sheet, and apply some liquid (for waterproof?). But I don't known how those layers...

I would like to learn more about metal deck roof with waterproof material construction details. I am wondering if some one here can give me suggestions or references. Thanks.

Thanks. BArtired, I am also concerning the stability issue around concrete wall and W36 beam. It is easy to understand for adding stiffeners according to AISC 13th J10.4. But it seems still need a diagonal bracing to prevent overall movement such as wall horizontal deflection. We use metal deck...

Thanks all. According to my attaching sketch, the concrete wall is parallel with the main support beam. Is it adequate to consider the W27 as W36 compression flange lateral bracing?

Thanks DaveAtkins, Can you please talk about how to check sidesway web buckling in the supporting beam? Thank you again.

I am working on a beam connection design. According to Steel manual and reference book examples, most of connections are both beams' top flange at same level. I did not find any case with one beam placing on top of another beam. Is it adequate to place one beam on top of another beam if room...

Thanks all for sharing so valuable information.

Thank you. It is more than 2000 dollars for cambering each 60 span W40x324.

I have a WF beam (W40X324)cambering issues for help. We have a 60-ft span beam and will deflect about 1.5" under dead load. It will be expensive to camber this beam to 1.5". The beam will be under L/240" deflection under total load. Do I need to camber the beam? Any suggestions? Thanks.

I have some questions and need helps: 1. How to weld the horizontal bracing to bar joist top and bottom chords. I saw a lot of connection using bolt. But we think welding is easer than bolting (it is diffcult to make correct hole location on bracing angle). 2. We are going to construct a flat...

For analysis point of view, you need to consider wind speed in the tower site per ASCE 7. you might also need to consider "P-Delta" effect from dead load. For fabrication porint of view, the straight section is easer to fabricate than tappered section. Your tower base width can go as small as...