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This is kind of an emergency and i will appreciate any help i can get. I have a 3 story single family house. The floor is made of TJIs and the exterior walls are metal studs. If we cut a section thru the edge of slab we have the metal stud (lower floor) with the top track, then double wood...

thanks all for your answers. i finally convinced the owner and the architect to use concrete on the first floor and thus tie the walls together.

i have to design a three story house on long island where the basic wind speed exceeds 110mph and therefore i cannot use prescreptive methods to design the vertical diaphragms. From the ground(1st floor) to the 2nd floor the exterior walls are reinforced CMU with 4"brick in front. From the...

i cannot assume that the wall is supported at the top. too much load to bring into the plywood diaphragm of the first floor.

thanks for your replies. the walls by archtectural geometry have to be 16" thick and 11' deep.(12.5 ft to the bottom of the wall ftg).so i have decided to design them as cantilever retaining walls. however they are only secure against overturning when all the dead weight is on. (all the four...

i like the idea of the rim beam. let's say that i design the wall as a propped cantilever with pressure at rest. then i design the footing as a beam spanning between the cross walls subjected to a uniform load (the reaction of the propped cantilever) and the uniform torsion equal the moment at...

I have an 11' deep basement in a residential construction. Do i have to tie the basement slab to my basement wall? up to now i was thinking to use 6" thick "floating foundation slab" but i have second thoughts. Then i guess the wall i can design as cantilever wall using the active earth...

****** * * ************* * * * * * * cross section showing wall, attic floor and roof

in an existing house the roof joists have been raised 2 feet above the top of the brick wall, and frame into the rafters. the roof joists support an uninhabitable attic floor. There are two wood plates at the top of the wall which i do not think that are connected to the wall. the rafters sit...

so how do you do that?

i am looking for steel foundation pile specifications and capacities. any ideas where to look for them?

can you provide a support directly under the press that can rest on a footing? in this case you do not have to reinforce the floor.

i have no idea who made the beams. i had a coupon taken from the end flange and we tested that. from the size of the beams some said that they are 15" american standard. the testing lab told me that this steel is weldable (if that tells us anything). Some other info on the composition is...

i am checking some steel beams from 1906 in New York City. Based on AISC at that time, the allowable bending stress was around 16 to 18 ksi. However i have tested the material and found that the yield stress is 38300psi and the tensile strength is 64300psi. The percent elongation in 2" is...

I would like to mention that the results from the testing of the steel gave yield stress of 38300psi and tensile stress of 64300psi. The bending stress from the new loads is 21000psi. i do not see how this steel could have an allowable of only 16 or 18 ksi. I will tend to agree with JAE...

i have an old steel building built in 1906 in New York City. I have to check the existing beams for some new loading. I have tested the beams and found that they are A36 steel. What allowable bending stress i am allowed to use? do i have to find the steel code of that era or can i use the...

thanks for all the replies

thanks samdamon for your help. i am pretty sure that we have the first system of floor and not the second. We have terracotta tiles. I thought that 15' is long span for those and i am looking now to see if there are secondary beams in between the main beams where the terracotta spans to. In...

pylko: what is the tf for those two sizes? it maybe that the measurement is a little off. If the tf shown is 1/4" then it maybe right. For beam #2 i made a mistake the bf=4.5" and not 4". is there anything close in the reference book? if the tf shown is a little smaller than the one...

thanks JAE. what do you mean by rivet steel?