MIAMI TECH, INC.
AST Standard Duty
A/C Stand Design Tool
FBC 6th Ed. (2017) - HVHZ & NON-HVHZ
     
Click to View
FSA #: FL21464-R1
   
CONTRACTOR & JOB INFORMATION
Contractor Name: Job Name:
Job Address: Job City/State: , FL
      DETERMINE SITE SPECIFIC DESIGN PRESSURES  
Lateral Wind Load and Uplift Wind Load shown below are for both HVHZ and non-HVHZ zones.
?
(STEP 1) Exposure Category:
Click to view
How to Determine
Lateral Wind Load (psf) = 
(STEP 2) Roof Height (ft):
Uplift Wind Load (psf) = 
(STEP 3) Windspeed (mph):
Click to view
Get Windspeed
      STAND AND UNIT INFORMATION  
Enter unit dimensions (a minimum of 1 unit and a maximum of 5 units) as well as Stand Dimensions. See photo below for description (example below has 2 frames).
?
(STEP 4)         (STEP 5)    
Unit # Width (in) Depth (in) Height (in)
1
Unit Height must be less than or equal to 45 inches.
  Post Height (in) =
See Requirements
2
Unit Height must be less than or equal to 45 inches.
Stand Depth (in) =
3
Unit Height must be less than or equal to 45 inches.
Number of Frames =
4
Unit Height must be less than or equal to 45 inches.
Roof Substrate:   
5
Unit Height must be less than or equal to 45 inches.
Part No.
   
The table below lists all potential failure modes of the proposed A/C stand. All stand components listed shall be below 100%.
?
DESIGN CHECK SUMMARY    
Moment In Post
Moment In Frame
Moment In Rail
Axial Load In Post.
Frame Weld (Moment)
Frame Weld (Shear)
Base Weld (Moment)
Base Weld (Shear)
Channel Weld (Moment)
Channel Weld (Shear)
 Anchor Capacity
Clip Capacity
Moment CAB Angle
CAB Angle Tie-Down
         
This document is not legally binding without the certification of a Professional Engineer. 
NOTICE TO ALL CONTRACTORS AND BUILDING OFFICIALS:
ALL CALCULATION RESULTS CAN ONLY BE ACHIEVED BY AND USED FOR MIAMI TECH A/C ROOF STANDS COMPLETE SYSTEM
OF FRAMES AND I -BEAMS BEARING THE MTI STAMPED MARKING ON ITS COMPONENTS.
• Contractor to determine beam length based on unit width(s) PLUS the required spacing of units as specified by the euipment manufacturer.
• When specified stand depth indicated is greater than the unit to be mounted, Cross Mounting Angles (MTI part # AS17CAB-xx) are a 
  required accessory for installation.
• If no results found using this calculator, please Contact Miami Tech Inc at (800)-339-2290 for further assistance.