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...
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 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...
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...
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 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...
the floor spans 15' and i was told by the architect that is a flat terracotta arch. i cannot probe because above and below are other apartments. Does anybody know what kind of thickness will span 15' and what is the self weight of this floor?
i have some old beams (from early 1900's)which i have the measurements but do not know the sizes. could anybody help me with this. beam#1 has the following measurements:
depth=14.75, bflange=5.5, tflange=3/8". Beam #2 has the following depth:10", bflange=4", tflange=3/8". i need I and S...
I have a building in Manhattan from the early 1900's. It is steel construction with flat arch floors. What could be the structural steel members ultimate capacity?
Will the mechanical and chemical properties of steel that has been exposed to fire change? Can we detect that steel has been exposed to fire by testing for changes to these properties?
I am renovating a house that has teracotta brick bearing exterior walls. the house is in NYC. According to the seismic code, since this is a major renovation, the resulting structure shall meet NYC seismic code. Any ideas on how to make these walls comply?
thanks
what is the usual way to attach light weight steel joists to a new CMU wall. Do they sit on the wall in pockets? or sit on a channel anchored in the wall? which is the cheapest solution?
thanks
ick2
I will use lightweight joist construction for a residencial project. Since my joists are 12" o.c. I am using a form deck UFS 9/16" thick and 2 1/2" slab. This gives a capacity of 480psf for a single span. However i have seen residential construction where for the same...
I am dealing with a foundation wall around a sidewalk vault. The wall is made out of stone and is 48' long and 9'tall (grade to underside of sidewalk beams). A 20' wide section is leaning 1 or 2 inches towards the vault. We need to support this wall. The owner wants a cheap solution. All the...
