Technical Information

Design Assumptions

In the preparation of input data for the elastic analysis of the awning frames, only areas and inertias of Schedule 40 pipe have been used. However, since the relative stiffness of the members of every structure considered is essentially the same, analysis based on pipe was applied to the design of the awning schemes using Allied “Gatorshield” tubing products as well as Schedule 40 pipe.

In order to estimate the actual elastic deflections, the designer should compare the pipe size and wall thickness used in the input for analysis, to the one shown in the design tables to be used for construction. Careful engineering judgement must be exercised in selecting the appropriate design, especially for awnings exposed to snow loads.

In general, an effective length factor of K = 0.65 has been used in the design. In order to comply, good quality workmanship is required in the welding process, per the general notes which follow.

The Load Resistance Factor Design concept has been used in the design process, and load factors of 1.3 have been used for live and wind loads. Load factors of 1.4 were applied for snow loads.

Notes

You are advised to thoroughly read the Section 10700 General Notes for Awnings, to fully comprehend the requirements, specifications, limitations and restrictions prior to application. The specifications, descriptions, information and illustrated material herein is not intended nor should it be relied upon to provide anyone with all of the relevant information required. Reference should be made to original or primary source date along with standard accepted industry practice. The material herein is as of the date of publication and subject to change without notice. Nothing contained herein shall give rise to an express or implied warranties, including any warranty of merchantability, fitness for a particular purpose or otherwise, relating to Allied Tube & Conduit Corporation. Although this manual has been meticulously reviewed prior to publication, notification of any errors, or comments and suggestions would be greatly appreciated by Allied Tube & Conduit.

Live, Wind & Snow Loads

Three different design combinations are provided, typical of regional code requirements. Given the large discrepancies, however, between the Standard Building Code (SBCCI) and the South Florida Building Code (SFBC), a load pattern that covers both code requirements has been used. It should be noted that considerable savings in steel weight could be realized in areas where SBCCI fully applies, particularly in the case of long spans.

South Florida and Gulf (Coastal) Areas:

• Snow = 0, Live Load = 15 PSF, Uplift = 15 PSF

East, Central and West Zones:

• Snow = 25 PSF, Live Load* = 15 PSF, Uplift = 15 PSF

New England, North Central and Northern States:

• Snow = 40 PSF, Live Load* = 15 PSF, Uplift = 15 PSF
• Does not govern design
• Dead Loads: 2 PSF or less

Live load reductions are applied according to SFBC in the design of girders. No consideration for unbalanced loads, drifting or sliding snow loads has been considered in any of the three load cases. However, snow loads have been reduced as permitted by ANSI A 58.1 – 1982 7.4.3, which is a nationally recognized standard.

It should be noted that the regional code load requirements applied are meant only as a guide. They may over or understate actual requirements. It is the responsibility of the designer to determine local regulations and restrictions governing dead, live, wind, snow, and seismic load conditions as applicable to the particular project.

Notes

You are advised to thoroughly read the Section 10700 General Notes for Awnings, to fully comprehend the requirements, specifications, limitations and restrictions prior to application. The specifications, descriptions, information and illustrated material herein is not intended nor should it be relied upon to provide anyone with all of the relevant information required. Reference should be made to original or primary source date along with standard accepted industry practice. The material herein is as of the date of publication and subject to change without notice. Nothing contained herein shall give rise to an express or implied warranties, including any warranty of merchantability, fitness for a particular purpose or otherwise, relating to Allied Tube & Conduit Corporation. Although this manual has been meticulously reviewed prior to publication, notification of any errors, or comments and suggestions would be greatly appreciated by Allied Tube & Conduit.

Section 10700