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Somundy Enterprises offers Engineering and Design Services of light gauge steel framing systems. Our experienced team of Engineers, provides you with a complete line of design services that will make your building process cost effective and fast.

Our designers are experienced and very qualified. Having designed thousands of commercial and residential buildings, Somundy Enterprises International provides the highest quality and most economical light gage steel roof, wall and floor solutions available.

Structural Engineering Design
Our team of Engineers and Technologists can design light steel structures to conform to any specification or building code in the world. Seismic loads, wind loads, snow loads, and live loads are all considered when determining the structural design requirements. In addition, our Engineers will also provide you with back-up calculations, fire rated assemblies, thermal and sound assemblies, structural member sizes, gages and maximum spacing requirements. This information is delivered in a drawing form that may be used to obtain municipal approvals.

Production & Installation Drawings
Our Designers will build a virtual 3 dimensional CAD model of your building, and frame it according to Engineering calculations and detailing. Clear and comprehensive production and Installation drawings are generated from the model. The drawings will enable you to build your light gage steel framing most efficiently and effectively while ensuring proper installation that will meet the design requirements. The drawings included are;


Wall and Floor Framing Layouts and Connection Details
These drawings provide you with all the information required to frame the floors and walls of your building structure. They include; structural member sizes, gages, maximum spacing requirements, beam and lintel sizes, load bearing and non-load bearing wall locations, and typical/specific connection details that meet engineering and building code requirements.

Roof and Truss Layout Drawings and Connection Details
Your roof will be designed with a light gage steel truss system and/or c-channel rafter framing. Drawings will be provided to allow you to construct the roof and/or produce trusses prior to on-site installation. Connection details will also be provided along with roof bracing diagrams.

Foundation Layout Drawings
These drawings outline and confirm the foundation of your building and provide you with important information regarding cast-in tie down items, beam pockets and/or special piers or footings. This drawing allows for accurate coordination with your foundation contractor.


Engineering Certificate & Sign-Off

We complete the project with an on-site review of the framing once it is erected. This review is to ensure that the framing was installed according to the engineering design. The engineer will submit a certified letter of completion to you and the building officials. This provides you and your local building department with the appropriate assurance that the building was built as designed.

All trusses are modeled in STRAP, a specialized light gauge steel analysis computer program. The truss model is input into the computer graphically, consisting of beam elements and nodes, or points of intersection of beam elements. The orientation of the beam in space is assigned through setting the local axis. Each beam in the program is assigned a material property from the database of available shapes. Beam end releases are assigned where required. Continuously rolled members are assigned fixed intermediate end releases where web members create a node. Standard practice is to assign a pinned connection at one support and a roller connection at the other support.

Loads are applied to the beams continuously across the length of the beam to accurately reflect the dead load conditions as specified on the drawings. Live loads are applied in accordance to their value and direction. Snow loads are applied to the top chords in values required by the plans, and are stated on the shop drawings.

NOTE: Other truss programs often assign loads at nodes only, which neglects the fact that proper analysis of the chords requires treating them as a continuous beam. In a light gauge steel truss, axial forces alone are usually not the limiting factor, but rather the lateral-torsion buckling stress in conjunction with the axial forces that limit the allowable loads. The software we use applies this more stringent method of analysis.

Standard combinations tested are per ASCE 7-98
The program reports results for the worst case load case combination
Standard loadings calculated are as follows:

Floor live load- 40 psf Floor dead load- 10 psf
Snow load 30 psf
(factored by exposure coefficient)
Roof dead load- 10 psf
Wind velocity design pressure - 80 mph Ceiling dead load- 5 psf
Roof live load- 25 psf  

In some cases, local codes may require values other than the standards noted above. It is the responsibility of the purchaser to supply local code design loads if other than above.

Results are tabulated and reported in list fashion, sequentially by beam number. The beam number graphic is printed separately from the tabulated results. Results are reported as a percentage of allowable stress on each beam. Fastener count is derived from beam axial stresses. Allowable fastener stress is computed in accordance to standards established by AISI. When joining metal of different gauges, only the thinner gauge value is used.

Shear Values of Screws (# 10-16 drill point) in pounds
Factor of Safety for screws values is 3.0

Steel Gauge
20
18
16
Allowable Load in Shear 243 419 513