Install Instructions

Publication: January 2021
ISIMET/MAPA, LLC Box 129 Naples, Texas 75568 Phone [phone] Fax [phone]
Recommended Maximum Support Spacing for Horizontal Installation
Recommended support spacing based on the ASME standard recommended pipe support spacing
guidelines.
Nominal Diameter
Pipe - NPS
(inches)
MAPA Products recommended maximum space between Supports
Standard Steel Pipe
Copper Tube
Water
Steam
Water
1/2
7
8
5
3/4
7
9
5
1
7
9
6
1 1/2
9
10
8
2
10
10
8
2 1/2
10
10
9
3
10
10
10
4
10
10
10
Maximum support spacing for PVC - Polyvinyl Chloride - pipes depends on the operating temperature. Refer to pipe
manufactures data.
- The typical application for MAPA strut supports are electrical conduit; consideration should be given to the size and
number of conduits and the supports recommended weight limit so that maximum support load is not exceeded.
Maintenance:
Often damage to piping and supports systems occur during routine maintenance, renovations and/or improvements.
This type of damage is difficult to verify, therefore ISIMET/MAPA, LLC must be notified ten (10) days in advance of roof
traffic in conjunction with any major maintenance, renovations and/or improvements and upon completion
of said
traffic. Damage caused by said traffic is not warranted.