I looked at a house where the Contractor has used a 1"x4" sill plate on top of the foundation wall instead of a 2"x4" sill plate specified by code. The sill plate is anchored to the foundation wall with anchors at 4'-0" o/c (half the code required spacing) and the floor joists are toenailed to...
I am looking for possible solutions to gain access to the interior of a rooftop light well/belvedere. The belvedere opening is approximately 25'-0" long and 8'-0" wide (see attached file). The reason for access would be future window washing of the upper windows.
I have already considered...
I have several granite bases (30"x30"x30") subject to overturning due to wind loads on sculptures supported by the granite bases. The granite bases are typically dowelled into a reinforced concrete footing. I have attached a sketch.
Normally I would propose anchoring the granite base using...
It is becoming increasingly popular to install arrays of solar panels onto existing flat roof structures. See attached jpg for an example of racking for solar panels.
The racking and solar panels are elevated from the top surface of the roof and racking manufacturers typically provide leg loads...
Hello,
I have a project to design a 75ft. long, 12" thick curved wall for a cenotaph in Canada. Crack control is essential as no joints allowed and it will be an exposed, polished concrete surface. I have had a little experience with water retaining structures where minimum reinforcement ratio...
I have a client who would like a cantilevered glass guard around the 2nd floor level of their boathouse (10 to 12 ft. height above grade/water level). Guard would be 1070 mm (42in.) high, no posts, no top/bottom rails. I have been shown examples of similar type rails installed by the glass...
I have been asked to calculate the natural frequency of a rectangular sign structure, 20' long x 12' high, cantilevered from it's base. I have not been able to source a formula for this particular shape. Can anyone point me in the right direction for a source of this type of information for...
I am designing a large cantilevered 'sign type' structure. The Canadian Steel Handbook provides properties and dimensions for round HSS sections up to 16" in diameter, however, prelim calcs indicate a larger diamter is required. Does anyone know where I can source information on larger diameter...
I am looking for either a code reference (USA/CAN) or guideline for the allowable deflection of steel HSS posts supporting a relatively small sign structure (in the 40 sq. ft. range about 12 to 14 ft. above ground level)due to wind loading. The steel HSS posts cantilever from a concrete...
I have a client that would like a curved set of stairs between the main and upper floor of their custom home. The layout of the house does not allow for any intermediate support of the stringers. The concept has the stairs curving a total of 90 degrees with open treads. The stair contractor is...
