Formwork Design Loads

north_man · Jan 31, 2024

Got a formwork job for a slab. Should the design loads used be the loads given on the structural set? Or should they be construction design loads.

With respect to live, the given live load is 100 psf. Construction live load could be taken as 50 psf. Which to use?

For dead load, should I use their given dead loads or should I just take the self-weight of the materials and my forms?

DoubleStud · Jan 31, 2024

you use 50 psf live load to design the form. When you design the concrete (concrete cured to design strength), it needs to be able to support the 100 psf live load.

Dead load, you use dead load of the form plus wet concrete for the form design. The concrete design use their DL and concrete DL (Assuming they have not counted the concrete).

jjl317 · Feb 1, 2024

If you are designing to US standards, ACI SP-4 Formwork for Concrete is a great resource.

FWIW - there are many companies out there who sell/rent/design specialized systems to simplify the whole process.

HTURKAK · Feb 2, 2024

Pls look ACI 347-04_ Guide to Formwork for Concrete. The following excerpt from the same .

Use it up, wear it out;
Make it do, or do without.

NEW ENGLAND MAXIM

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Formwork Design Loads

north_man

Structural

Recommended for you

DoubleStud

Structural

jjl317

Structural

HTURKAK

Structural

Similar threads

Part and Inventory Search

Sponsor