I am designing the anchorage of a double 2x8 wood plate to concrete using a post-installed screw anchor. The applicable code is the 2018 IBC and the 2018 AWC NDS. I have the anchor design and the lateral load on the wood complete and there are no problems there. How do I calculate the...
All,
I have a wide flange beam that I believe is a WF16x8.5 that would have been constructed in the early 1960s. What is the allowable stress for this beam if it was designed per the 5th edition of the AISC Manual? What is the allowable stress for this beam if it was designed per the 6th...
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I want to check the capacity of some existing steel columns that are TS7x7x3/8. The building was constructed in 1982. Does anyone have a reference that would specify the minimum yield stress of this shape for this time period?
Thank you,
EIT
Hello,
I am designing a retaining wall and the concrete needs to be designed according to ACI 318-14. Please refer to the attachment for a general sense of what I am talking about. However, my specific design has different dimensions and loading than shown in the attachment. The vertical...
Please refer to this closed thread: thread507-278845
Does anyone have any references that agree with BARetired's statement about designing an interior wall to the full exterior wall pressures if the bays on each side of the wall are partially enclosed?
EIT
Hello,
I am designing a building per Ch. 30 part 2 of ASCE 7-10. I have the MWFRS pressures and the component and cladding (C&C) pressures for the walls and the roof taken directly for Fig. 30.5-1. I'm struggling a little with the roof overhang C&C pressures. My building requires a basic wind...
Hello,
I am using ASCE 7-10 and I have calculated the "design wind force" on a sign according to equation 29.4-1 (F = qhGCfAs). I came up with F = 2.1 kips. Do I treat "F" as "W" in the load combinations listed in Chapter 2 of ASCE 7-10?
I am ultimately trying to design the foundation for...
Hello,
Please refer to the attachment. I am designing a support structure for three mechanical units to sit on it. The structure will span over the roof of a walk-in cooler and the units will be bolted directly to the W16x67 beams. I am thinking that these long beams will be connected to the...
Does ASCE 7-10 offer any guidance on how the C&C pressures on the walls of a structure with an arched roof should be calculated? The structure is enclosed with a mean roof height, h, of 32'-0". Chapter 30 part 3 is applicable to an enclosed or partially enclosed building with h > 60' and an...
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I am analyzing the component and cladding wind pressures on an arched roof. Note #4 of Fig. 27.4-3 of ASCE 7-10 states "For components and cladding: (1) At roof perimeter, use the external pressure coefficients in Fig. 30.4-2A, B and C with theta based on spring-line slope and (2)...
Hello,
In ASCE 7-10 12.11.1, it states "Structural walls and their anchorage shall be designed for a force normal to the surface equal to Fp=0.4(Sds)(Ie) times the weight of the structural wall with a minimum force of 10% of the weight of the structural wall."
My question is this: When I...
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I have a quick question. I am designing a concrete masonry unit wall to span vertically between the floor slab and the roof diaphragm. My design requires that the wall be reinforced vertically with #4 rebar at 3'-4" on center. I have a continuous horizontal bond beam at the roof...
Hello,
I am working on the foundation designs for a pre-engineered metal building that was designed according to the 2015 IBC and ASCE 7-10. This is my first foundation design using the 2015 IBC and the "new" wind loads. I am accustom to the 2009 IBC. I feel like this topic has been beat to...
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Is anyone able to help me to identify what the precast roof panels are in the attachment? They are 18" wide and 3" thick and contain some welded wire reinforcement as can be seen in the attachment. There is some sort of 1/2" thick fiber board on top of the panels and then rubber...
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I have some existing plans for a project built in 1957. The plans call for "SJ 146" steel joists to support the flat roof. I easily found the load tables associated with this steel joist designation in the 75-Year Steel Joist Manual, so I thought my job of analyzing the joists was...
All,
Per ASCE 7-05, Table 12.2-1, how would you classify the seismic force resisting system of this wood framed building? I am trying to determine the response modification coefficient, R, to calculate the seismic response coefficient. FYI, wind will probably control my lateral analysis for...
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I am tasked with calculating the wind loads on wood framed Gambrel roof trusses that span 65'-0". The slope on the lower portion of the truss is about 62 degrees and the slope on the upper portion of the truss is about 22 degrees. They are symmetrical about the center. I am using...
See the attached picture. This is an approximately 36" long crack in a 6" thick vertical piece of granite. Can anyone suggest an appropriate epoxy to repair it? Whatever product that I end up specifying, will be exposed to temperatures in the winter of around -10 degrees below zero Fahrenheit...
Hello,
I am working on a structure that will get "over-build" trusses installed on top of a flat roof to create a look like a mansard roof. I am trying to determine my reaction forces for these trusses. I have calculated my wind loads but I'm not sure when to use roof uplift or pressure with...
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I do have this posted in the OSHA section also, but noticed the last post there was 4 months ago.
I am working with a contractor to establish a fall protection system to be used during the demolition of a bridge. The bridge deck is only 10'-0" off the ground. The contractor wants to...
